Vulnerability-Lookup

BDU:2026-09411 (CVE-2022-50177)

Vulnerability from fstec – Published: 2026-07-08 – Updated: 2026-07-08 – View on bdu.fstec.ru Fixed

Title

Уязвимость функций rcutorture_booster_init() и rcu_torture_init() в модуле kernel/rcu/rcutorture.c подсистемы синхронизации в многопоточных системах ядра операционной системы Linux, позволяющая нарушителю вызвать отказ в обслуживании

Summary

Уязвимость функций rcutorture_booster_init() и rcu_torture_init() в модуле kernel/rcu/rcutorture.c подсистемы синхронизации в многопоточных системах ядра операционной системы Linux связана с некорректной инициализацией. Эксплуатация уязвимости может позволить нарушителю вызвать отказ в обслуживании

Severity

4.6 (Medium) CVSS 2.0


                      
                        AV:L/AC:L/Au:S/C:N/I:N/A:C

5.5 (Medium) CVSS 3.1


                      
                        CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Class

Code vulnerability

Status

Confirmed by the vendor

Exploitation

Resource manipulation

Incidents

Being clarified

Remediation

Software update

CWE

CWE-665 - Неверная инициализация

Aliases

CVE-2022-50177

References

10 references

URL
https://git.kernel.org/stable/c/7e7472c62c6ded322afd9d5ac8bb20a08e7c5674
https://git.kernel.org/stable/c/3002153a91a9732a6d1d0bb95138593c7da15743
https://git.kernel.org/stable/c/621595f771a6bd458ffbc40679e222ba5d0a7a1e
https://git.kernel.org/stable/c/8e84693621f53bf894af9905a6531e0530402145
https://www.cve.org/CVERecord?id=CVE-2022-50177
https://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.61
https://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.18.18
https://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.19.2
https://access.redhat.com/security/cve/cve-2022-50177
https://ubuntu.com/security/CVE-2022-50177

Impacted products

3 products from 4 vendors

Vendors

Red Hat, Inc., Canonical Ltd., Сообщество свободного программного обеспечения

Products

Red Hat Enterprise Linux, Ubuntu, Linux

Versions

8.0 (Red Hat Enterprise Linux), 20.04 LTS (Ubuntu), 22.04 LTS (Ubuntu), от 5.19 до 5.19.1 включительно (Linux), от 5.16 до 5.18.17 включительно (Linux), 9.0 (Red Hat Enterprise Linux), от 5.14 до 5.15.60 включительно (Linux)

Product types

Operating system

Platforms

Red Hat, Inc. Red Hat Enterprise Linux 8.0, Canonical Ltd. Ubuntu 20.04 LTS, Canonical Ltd. Ubuntu 22.04 LTS, Сообщество свободного программного обеспечения Linux от 5.19 до 5.19.1 включительно, Сообщество свободного программного обеспечения Linux от 5.16 до 5.18.17 включительно, Inc. Red Hat Enterprise Linux 9.0, Сообщество свободного программного обеспечения Linux от 5.14 до 5.15.60 включительно

Mitigations

В условиях отсутствия обновлений безопасности от производителя рекомендуется придерживаться "Рекомендаций по безопасной настройке операционных систем LINUX", изложенных в методическом документе ФСТЭК России, утверждённом 25 декабря 2022 года. Использование рекомендаций: Для Linux: https://git.kernel.org/stable/c/7e7472c62c6ded322afd9d5ac8bb20a08e7c5674 https://git.kernel.org/stable/c/3002153a91a9732a6d1d0bb95138593c7da15743 https://git.kernel.org/stable/c/621595f771a6bd458ffbc40679e222ba5d0a7a1e https://git.kernel.org/stable/c/8e84693621f53bf894af9905a6531e0530402145 https://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.61 https://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.18.18 https://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.19.2 Для Debian GNU/Linux: https://access.redhat.com/security/cve/cve-2022-50177 Для Ubuntu: https://ubuntu.com/security/CVE-2022-50177

JSON

To clipboard

{
  "CVSS 2.0": "AV:L/AC:L/Au:S/C:N/I:N/A:C",
  "CVSS 3.0": "AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
  "CVSS 4.0": null,
  "remediation_\u0418\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440": null,
  "remediation_\u041d\u0430\u0438\u043c\u0435\u043d\u043e\u0432\u0430\u043d\u0438\u0435": null,
  "\u0412\u0435\u043d\u0434\u043e\u0440 \u041f\u041e": "Red Hat, Inc., Canonical Ltd., \u0421\u043e\u043e\u0431\u0449\u0435\u0441\u0442\u0432\u043e \u0441\u0432\u043e\u0431\u043e\u0434\u043d\u043e\u0433\u043e \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f",
  "\u0412\u0435\u0440\u0441\u0438\u044f \u041f\u041e": "8.0 (Red Hat Enterprise Linux), 20.04 LTS (Ubuntu), 22.04 LTS (Ubuntu), \u043e\u0442 5.19 \u0434\u043e 5.19.1 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (Linux), \u043e\u0442 5.16 \u0434\u043e 5.18.17 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (Linux), 9.0 (Red Hat Enterprise Linux), \u043e\u0442 5.14 \u0434\u043e 5.15.60 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (Linux)",
  "\u0412\u043e\u0437\u043c\u043e\u0436\u043d\u044b\u0435 \u043c\u0435\u0440\u044b \u043f\u043e \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u044e": "\u0412 \u0443\u0441\u043b\u043e\u0432\u0438\u044f\u0445 \u043e\u0442\u0441\u0443\u0442\u0441\u0442\u0432\u0438\u044f \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0439 \u0431\u0435\u0437\u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 \u043e\u0442 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044f \u0440\u0435\u043a\u043e\u043c\u0435\u043d\u0434\u0443\u0435\u0442\u0441\u044f \u043f\u0440\u0438\u0434\u0435\u0440\u0436\u0438\u0432\u0430\u0442\u044c\u0441\u044f \"\u0420\u0435\u043a\u043e\u043c\u0435\u043d\u0434\u0430\u0446\u0438\u0439 \u043f\u043e \u0431\u0435\u0437\u043e\u043f\u0430\u0441\u043d\u043e\u0439 \u043d\u0430\u0441\u0442\u0440\u043e\u0439\u043a\u0435 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u043e\u043d\u043d\u044b\u0445 \u0441\u0438\u0441\u0442\u0435\u043c LINUX\", \u0438\u0437\u043b\u043e\u0436\u0435\u043d\u043d\u044b\u0445 \u0432 \u043c\u0435\u0442\u043e\u0434\u0438\u0447\u0435\u0441\u043a\u043e\u043c \u0434\u043e\u043a\u0443\u043c\u0435\u043d\u0442\u0435 \u0424\u0421\u0422\u042d\u041a \u0420\u043e\u0441\u0441\u0438\u0438, \u0443\u0442\u0432\u0435\u0440\u0436\u0434\u0451\u043d\u043d\u043e\u043c 25 \u0434\u0435\u043a\u0430\u0431\u0440\u044f 2022 \u0433\u043e\u0434\u0430.\n\n\n\n\u0418\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435 \u0440\u0435\u043a\u043e\u043c\u0435\u043d\u0434\u0430\u0446\u0438\u0439:\n\n\u0414\u043b\u044f Linux:\nhttps://git.kernel.org/stable/c/7e7472c62c6ded322afd9d5ac8bb20a08e7c5674\nhttps://git.kernel.org/stable/c/3002153a91a9732a6d1d0bb95138593c7da15743\nhttps://git.kernel.org/stable/c/621595f771a6bd458ffbc40679e222ba5d0a7a1e\nhttps://git.kernel.org/stable/c/8e84693621f53bf894af9905a6531e0530402145\nhttps://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.61\nhttps://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.18.18\nhttps://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.19.2\n\n\u0414\u043b\u044f Debian GNU/Linux:\nhttps://access.redhat.com/security/cve/cve-2022-50177\n\n\u0414\u043b\u044f Ubuntu:\nhttps://ubuntu.com/security/CVE-2022-50177",
  "\u0414\u0430\u0442\u0430 \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0438\u044f": "21.06.2022",
  "\u0414\u0430\u0442\u0430 \u043f\u043e\u0441\u043b\u0435\u0434\u043d\u0435\u0433\u043e \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f": "08.07.2026",
  "\u0414\u0430\u0442\u0430 \u043f\u0443\u0431\u043b\u0438\u043a\u0430\u0446\u0438\u0438": "08.07.2026",
  "\u0418\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440": "BDU:2026-09411",
  "\u0418\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440\u044b \u0434\u0440\u0443\u0433\u0438\u0445 \u0441\u0438\u0441\u0442\u0435\u043c \u043e\u043f\u0438\u0441\u0430\u043d\u0438\u0439 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "CVE-2022-50177",
  "\u0418\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u044f \u043e\u0431 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0430",
  "\u041a\u043b\u0430\u0441\u0441 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u043a\u043e\u0434\u0430",
  "\u041d\u0430\u0437\u0432\u0430\u043d\u0438\u0435 \u041f\u041e": "Red Hat Enterprise Linux, Ubuntu, Linux",
  "\u041d\u0430\u0438\u043c\u0435\u043d\u043e\u0432\u0430\u043d\u0438\u0435 \u041e\u0421 \u0438 \u0442\u0438\u043f \u0430\u043f\u043f\u0430\u0440\u0430\u0442\u043d\u043e\u0439 \u043f\u043b\u0430\u0442\u0444\u043e\u0440\u043c\u044b": "Red Hat, Inc. Red Hat Enterprise Linux 8.0 , Canonical Ltd. Ubuntu 20.04 LTS , Canonical Ltd. Ubuntu 22.04 LTS , \u0421\u043e\u043e\u0431\u0449\u0435\u0441\u0442\u0432\u043e \u0441\u0432\u043e\u0431\u043e\u0434\u043d\u043e\u0433\u043e \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f Linux \u043e\u0442 5.19 \u0434\u043e 5.19.1 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e , \u0421\u043e\u043e\u0431\u0449\u0435\u0441\u0442\u0432\u043e \u0441\u0432\u043e\u0431\u043e\u0434\u043d\u043e\u0433\u043e \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f Linux \u043e\u0442 5.16 \u0434\u043e 5.18.17 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e , Red Hat, Inc. Red Hat Enterprise Linux 9.0 , \u0421\u043e\u043e\u0431\u0449\u0435\u0441\u0442\u0432\u043e \u0441\u0432\u043e\u0431\u043e\u0434\u043d\u043e\u0433\u043e \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f Linux \u043e\u0442 5.14 \u0434\u043e 5.15.60 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e ",
  "\u041d\u0430\u0438\u043c\u0435\u043d\u043e\u0432\u0430\u043d\u0438\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0444\u0443\u043d\u043a\u0446\u0438\u0439 rcutorture_booster_init() \u0438 rcu_torture_init() \u0432 \u043c\u043e\u0434\u0443\u043b\u0435 kernel/rcu/rcutorture.c \u043f\u043e\u0434\u0441\u0438\u0441\u0442\u0435\u043c\u044b \u0441\u0438\u043d\u0445\u0440\u043e\u043d\u0438\u0437\u0430\u0446\u0438\u0438 \u0432 \u043c\u043d\u043e\u0433\u043e\u043f\u043e\u0442\u043e\u0447\u043d\u044b\u0445 \u0441\u0438\u0441\u0442\u0435\u043c\u0430\u0445 \u044f\u0434\u0440\u0430 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u043e\u043d\u043d\u043e\u0439 \u0441\u0438\u0441\u0442\u0435\u043c\u044b Linux, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u043d\u0430\u0440\u0443\u0448\u0438\u0442\u0435\u043b\u044e \u0432\u044b\u0437\u0432\u0430\u0442\u044c \u043e\u0442\u043a\u0430\u0437 \u0432 \u043e\u0431\u0441\u043b\u0443\u0436\u0438\u0432\u0430\u043d\u0438\u0438",
  "\u041d\u0430\u043b\u0438\u0447\u0438\u0435 \u044d\u043a\u0441\u043f\u043b\u043e\u0439\u0442\u0430": "\u0414\u0430\u043d\u043d\u044b\u0435 \u0443\u0442\u043e\u0447\u043d\u044f\u044e\u0442\u0441\u044f",
  "\u041e\u043f\u0438\u0441\u0430\u043d\u0438\u0435 \u043e\u0448\u0438\u0431\u043a\u0438 CWE": "\u041d\u0435\u0432\u0435\u0440\u043d\u0430\u044f \u0438\u043d\u0438\u0446\u0438\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u044f (CWE-665)",
  "\u041e\u043f\u0438\u0441\u0430\u043d\u0438\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0444\u0443\u043d\u043a\u0446\u0438\u0439 rcutorture_booster_init() \u0438 rcu_torture_init() \u0432 \u043c\u043e\u0434\u0443\u043b\u0435 kernel/rcu/rcutorture.c \u043f\u043e\u0434\u0441\u0438\u0441\u0442\u0435\u043c\u044b \u0441\u0438\u043d\u0445\u0440\u043e\u043d\u0438\u0437\u0430\u0446\u0438\u0438 \u0432 \u043c\u043d\u043e\u0433\u043e\u043f\u043e\u0442\u043e\u0447\u043d\u044b\u0445 \u0441\u0438\u0441\u0442\u0435\u043c\u0430\u0445 \u044f\u0434\u0440\u0430 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u043e\u043d\u043d\u043e\u0439 \u0441\u0438\u0441\u0442\u0435\u043c\u044b Linux \u0441\u0432\u044f\u0437\u0430\u043d\u0430 \u0441 \u043d\u0435\u043a\u043e\u0440\u0440\u0435\u043a\u0442\u043d\u043e\u0439 \u0438\u043d\u0438\u0446\u0438\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0435\u0439. \u042d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u043c\u043e\u0436\u0435\u0442 \u043f\u043e\u0437\u0432\u043e\u043b\u0438\u0442\u044c \u043d\u0430\u0440\u0443\u0448\u0438\u0442\u0435\u043b\u044e \u0432\u044b\u0437\u0432\u0430\u0442\u044c \u043e\u0442\u043a\u0430\u0437 \u0432 \u043e\u0431\u0441\u043b\u0443\u0436\u0438\u0432\u0430\u043d\u0438\u0438",
  "\u041f\u043e\u0441\u043b\u0435\u0434\u0441\u0442\u0432\u0438\u044f \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u0438 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": null,
  "\u041f\u0440\u043e\u0447\u0430\u044f \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u044f": null,
  "\u0421\u0432\u044f\u0437\u044c \u0441 \u0438\u043d\u0446\u0438\u0434\u0435\u043d\u0442\u0430\u043c\u0438 \u0418\u0411": "\u0414\u0430\u043d\u043d\u044b\u0435 \u0443\u0442\u043e\u0447\u043d\u044f\u044e\u0442\u0441\u044f",
  "\u0421\u043e\u0441\u0442\u043e\u044f\u043d\u0438\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d\u0430",
  "\u0421\u043f\u043e\u0441\u043e\u0431 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u044f": "\u041e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0435 \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f",
  "\u0421\u043f\u043e\u0441\u043e\u0431 \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u0438": "\u041c\u0430\u043d\u0438\u043f\u0443\u043b\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u0435 \u0440\u0435\u0441\u0443\u0440\u0441\u0430\u043c\u0438",
  "\u0421\u0441\u044b\u043b\u043a\u0438 \u043d\u0430 \u0438\u0441\u0442\u043e\u0447\u043d\u0438\u043a\u0438": "https://git.kernel.org/stable/c/7e7472c62c6ded322afd9d5ac8bb20a08e7c5674\nhttps://git.kernel.org/stable/c/3002153a91a9732a6d1d0bb95138593c7da15743\nhttps://git.kernel.org/stable/c/621595f771a6bd458ffbc40679e222ba5d0a7a1e\nhttps://git.kernel.org/stable/c/8e84693621f53bf894af9905a6531e0530402145\nhttps://www.cve.org/CVERecord?id=CVE-2022-50177\nhttps://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.61\nhttps://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.18.18\nhttps://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.19.2\nhttps://access.redhat.com/security/cve/cve-2022-50177\nhttps://ubuntu.com/security/CVE-2022-50177",
  "\u0421\u0442\u0430\u0442\u0443\u0441 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u041f\u043e\u0434\u0442\u0432\u0435\u0440\u0436\u0434\u0435\u043d\u0430 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u0435\u043c",
  "\u0422\u0438\u043f \u041f\u041e": "\u041e\u043f\u0435\u0440\u0430\u0446\u0438\u043e\u043d\u043d\u0430\u044f \u0441\u0438\u0441\u0442\u0435\u043c\u0430",
  "\u0422\u0438\u043f \u043e\u0448\u0438\u0431\u043a\u0438 CWE": "CWE-665",
  "\u0423\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0421\u0440\u0435\u0434\u043d\u0438\u0439 \u0443\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 (\u0431\u0430\u0437\u043e\u0432\u0430\u044f \u043e\u0446\u0435\u043d\u043a\u0430 CVSS 2.0 \u0441\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 4,6)\n\u0421\u0440\u0435\u0434\u043d\u0438\u0439 \u0443\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 (\u0431\u0430\u0437\u043e\u0432\u0430\u044f \u043e\u0446\u0435\u043d\u043a\u0430 CVSS 3.1 \u0441\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 5,5)"
}

CVE-2022-50177 (GCVE-0-2022-50177)

Vulnerability from cvelistv5 – Published: 2025-06-18 11:03 – Updated: 2026-05-11 19:14

Title

rcutorture: Fix ksoftirqd boosting timing and iteration

Summary

In the Linux kernel, the following vulnerability has been resolved: rcutorture: Fix ksoftirqd boosting timing and iteration The RCU priority boosting can fail in two situations: 1) If (nr_cpus= > maxcpus=), which means if the total number of CPUs is higher than those brought online at boot, then torture_onoff() may later bring up CPUs that weren't online on boot. Now since rcutorture initialization only boosts the ksoftirqds of the CPUs that have been set online on boot, the CPUs later set online by torture_onoff won't benefit from the boost, making RCU priority boosting fail. 2) The ksoftirqd kthreads are boosted after the creation of rcu_torture_boost() kthreads, which opens a window large enough for these rcu_torture_boost() kthreads to wait (despite running at FIFO priority) for ksoftirqds that are still running at SCHED_NORMAL priority. The issues can trigger for example with: ./kvm.sh --configs TREE01 --kconfig "CONFIG_RCU_BOOST=y" [ 34.968561] rcu-torture: !!! [ 34.968627] ------------[ cut here ]------------ [ 35.014054] WARNING: CPU: 4 PID: 114 at kernel/rcu/rcutorture.c:1979 rcu_torture_stats_print+0x5ad/0x610 [ 35.052043] Modules linked in: [ 35.069138] CPU: 4 PID: 114 Comm: rcu_torture_sta Not tainted 5.18.0-rc1 #1 [ 35.096424] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.14.0-0-g155821a-rebuilt.opensuse.org 04/01/2014 [ 35.154570] RIP: 0010:rcu_torture_stats_print+0x5ad/0x610 [ 35.198527] Code: 63 1b 02 00 74 02 0f 0b 48 83 3d 35 63 1b 02 00 74 02 0f 0b 48 83 3d 21 63 1b 02 00 74 02 0f 0b 48 83 3d 0d 63 1b 02 00 74 02 <0f> 0b 83 eb 01 0f 8e ba fc ff ff 0f 0b e9 b3 fc ff f82 [ 37.251049] RSP: 0000:ffffa92a0050bdf8 EFLAGS: 00010202 [ 37.277320] rcu: De-offloading 8 [ 37.290367] RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000001 [ 37.290387] RDX: 0000000000000000 RSI: 00000000ffffbfff RDI: 00000000ffffffff [ 37.290398] RBP: 000000000000007b R08: 0000000000000000 R09: c0000000ffffbfff [ 37.290407] R10: 000000000000002a R11: ffffa92a0050bc18 R12: ffffa92a0050be20 [ 37.290417] R13: ffffa92a0050be78 R14: 0000000000000000 R15: 000000000001bea0 [ 37.290427] FS: 0000000000000000(0000) GS:ffff96045eb00000(0000) knlGS:0000000000000000 [ 37.290448] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 37.290460] CR2: 0000000000000000 CR3: 000000001dc0c000 CR4: 00000000000006e0 [ 37.290470] Call Trace: [ 37.295049] <TASK> [ 37.295065] ? preempt_count_add+0x63/0x90 [ 37.295095] ? _raw_spin_lock_irqsave+0x12/0x40 [ 37.295125] ? rcu_torture_stats_print+0x610/0x610 [ 37.295143] rcu_torture_stats+0x29/0x70 [ 37.295160] kthread+0xe3/0x110 [ 37.295176] ? kthread_complete_and_exit+0x20/0x20 [ 37.295193] ret_from_fork+0x22/0x30 [ 37.295218] </TASK> Fix this with boosting the ksoftirqds kthreads from the boosting hotplug callback itself and before the boosting kthreads are created.

Severity

No CVSS data available.

Assigner

Linux mitre root Scorecard

References

4 references

URL	Tags
https://git.kernel.org/stable/c/621595f771a6bd458…
https://git.kernel.org/stable/c/8e84693621f53bf89…
https://git.kernel.org/stable/c/7e7472c62c6ded322…
https://git.kernel.org/stable/c/3002153a91a9732a6…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: ea6d962e80b61996aeacb443661cc3adcb605315 , < 621595f771a6bd458ffbc40679e222ba5d0a7a1e (git) Affected: ea6d962e80b61996aeacb443661cc3adcb605315 , < 8e84693621f53bf894af9905a6531e0530402145 (git) Affected: ea6d962e80b61996aeacb443661cc3adcb605315 , < 7e7472c62c6ded322afd9d5ac8bb20a08e7c5674 (git) Affected: ea6d962e80b61996aeacb443661cc3adcb605315 , < 3002153a91a9732a6d1d0bb95138593c7da15743 (git)
Linux	Linux	Affected: 5.14 Unaffected: 0 , < 5.14 (semver) Unaffected: 5.15.61 , ≤ 5.15.* (semver) Unaffected: 5.18.18 , ≤ 5.18.* (semver) Unaffected: 5.19.2 , ≤ 5.19.* (semver) Unaffected: 6.0 , ≤ * (original_commit_for_fix)

Show details on NVD website

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "kernel/rcu/rcutorture.c"
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "affected",
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              "versionType": "git"
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            {
              "lessThan": "8e84693621f53bf894af9905a6531e0530402145",
              "status": "affected",
              "version": "ea6d962e80b61996aeacb443661cc3adcb605315",
              "versionType": "git"
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            {
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              "versionType": "git"
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              "versionType": "git"
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        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.14"
            },
            {
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              "status": "unaffected",
              "version": "0",
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            },
            {
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            {
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              "status": "unaffected",
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            {
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              "status": "unaffected",
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              "versionType": "semver"
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      "cpeApplicability": [
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                  "versionEndExcluding": "5.15.61",
                  "versionStartIncluding": "5.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.18.18",
                  "versionStartIncluding": "5.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.19.2",
                  "versionStartIncluding": "5.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.0",
                  "versionStartIncluding": "5.14",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nrcutorture: Fix ksoftirqd boosting timing and iteration\n\nThe RCU priority boosting can fail in two situations:\n\n1) If (nr_cpus= \u003e maxcpus=), which means if the total number of CPUs\nis higher than those brought online at boot, then torture_onoff() may\nlater bring up CPUs that weren\u0027t online on boot. Now since rcutorture\ninitialization only boosts the ksoftirqds of the CPUs that have been\nset online on boot, the CPUs later set online by torture_onoff won\u0027t\nbenefit from the boost, making RCU priority boosting fail.\n\n2) The ksoftirqd kthreads are boosted after the creation of\nrcu_torture_boost() kthreads, which opens a window large enough for these\nrcu_torture_boost() kthreads to wait (despite running at FIFO priority)\nfor ksoftirqds that are still running at SCHED_NORMAL priority.\n\nThe issues can trigger for example with:\n\n\t./kvm.sh --configs TREE01 --kconfig \"CONFIG_RCU_BOOST=y\"\n\n\t[   34.968561] rcu-torture: !!!\n\t[   34.968627] ------------[ cut here ]------------\n\t[   35.014054] WARNING: CPU: 4 PID: 114 at kernel/rcu/rcutorture.c:1979 rcu_torture_stats_print+0x5ad/0x610\n\t[   35.052043] Modules linked in:\n\t[   35.069138] CPU: 4 PID: 114 Comm: rcu_torture_sta Not tainted 5.18.0-rc1 #1\n\t[   35.096424] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.14.0-0-g155821a-rebuilt.opensuse.org 04/01/2014\n\t[   35.154570] RIP: 0010:rcu_torture_stats_print+0x5ad/0x610\n\t[   35.198527] Code: 63 1b 02 00 74 02 0f 0b 48 83 3d 35 63 1b 02 00 74 02 0f 0b 48 83 3d 21 63 1b 02 00 74 02 0f 0b 48 83 3d 0d 63 1b 02 00 74 02 \u003c0f\u003e 0b 83 eb 01 0f 8e ba fc ff ff 0f 0b e9 b3 fc ff f82\n\t[   37.251049] RSP: 0000:ffffa92a0050bdf8 EFLAGS: 00010202\n\t[   37.277320] rcu: De-offloading 8\n\t[   37.290367] RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000001\n\t[   37.290387] RDX: 0000000000000000 RSI: 00000000ffffbfff RDI: 00000000ffffffff\n\t[   37.290398] RBP: 000000000000007b R08: 0000000000000000 R09: c0000000ffffbfff\n\t[   37.290407] R10: 000000000000002a R11: ffffa92a0050bc18 R12: ffffa92a0050be20\n\t[   37.290417] R13: ffffa92a0050be78 R14: 0000000000000000 R15: 000000000001bea0\n\t[   37.290427] FS:  0000000000000000(0000) GS:ffff96045eb00000(0000) knlGS:0000000000000000\n\t[   37.290448] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n\t[   37.290460] CR2: 0000000000000000 CR3: 000000001dc0c000 CR4: 00000000000006e0\n\t[   37.290470] Call Trace:\n\t[   37.295049]  \u003cTASK\u003e\n\t[   37.295065]  ? preempt_count_add+0x63/0x90\n\t[   37.295095]  ? _raw_spin_lock_irqsave+0x12/0x40\n\t[   37.295125]  ? rcu_torture_stats_print+0x610/0x610\n\t[   37.295143]  rcu_torture_stats+0x29/0x70\n\t[   37.295160]  kthread+0xe3/0x110\n\t[   37.295176]  ? kthread_complete_and_exit+0x20/0x20\n\t[   37.295193]  ret_from_fork+0x22/0x30\n\t[   37.295218]  \u003c/TASK\u003e\n\nFix this with boosting the ksoftirqds kthreads from the boosting\nhotplug callback itself and before the boosting kthreads are created."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T19:14:18.248Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/621595f771a6bd458ffbc40679e222ba5d0a7a1e"
        },
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          "url": "https://git.kernel.org/stable/c/8e84693621f53bf894af9905a6531e0530402145"
        },
        {
          "url": "https://git.kernel.org/stable/c/7e7472c62c6ded322afd9d5ac8bb20a08e7c5674"
        },
        {
          "url": "https://git.kernel.org/stable/c/3002153a91a9732a6d1d0bb95138593c7da15743"
        }
      ],
      "title": "rcutorture: Fix ksoftirqd boosting timing and iteration",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-50177",
    "datePublished": "2025-06-18T11:03:27.588Z",
    "dateReserved": "2025-06-18T10:57:27.427Z",
    "dateUpdated": "2026-05-11T19:14:18.248Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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BDU:2026-09411 (CVE-2022-50177)

CVE-2022-50177 (GCVE-0-2022-50177)

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