CVE-2021-46905 (GCVE-0-2021-46905)

Vulnerability from cvelistv5 – Published: 2024-02-25 14:03 – Updated: 2026-05-23 15:18
VLAI
Title
net: hso: fix NULL-deref on disconnect regression
Summary
In the Linux kernel, the following vulnerability has been resolved: net: hso: fix NULL-deref on disconnect regression Commit 8a12f8836145 ("net: hso: fix null-ptr-deref during tty device unregistration") fixed the racy minor allocation reported by syzbot, but introduced an unconditional NULL-pointer dereference on every disconnect instead. Specifically, the serial device table must no longer be accessed after the minor has been released by hso_serial_tty_unregister().
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-03-04 21:23 UTC
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: a462067d7c8e6953a733bf5ade8db947b1bb5449 , < 5871761c5f0f20d6e98bf3b6bd7486d857589554 (git)
Affected: 145c89c441d27696961752bf51b323f347601bee , < 0c71d4c89559f72cec2592d078681a843bce570e (git)
Affected: caf5ac93b3b5d5fac032fc11fbea680e115421b4 , < 24b699bea7553fc0b98dad9d864befb6005ac7f1 (git)
Affected: 92028d7a31e55d53e41cff679156b9432cffcb36 , < 5c17cfe155d21954b4c7e2a78fa771cebcd86725 (git)
Affected: 4a2933c88399c0ebc738db39bbce3ae89786d723 , < d7fad2ce15bdbbd0fec3ebe999fd7cab2267f53e (git)
Affected: dc195928d7e4ec7b5cfc6cd10dc4c8d87a7c72ac , < 90642ee9eb581a13569b1c0bd57e85d962215273 (git)
Affected: 388d05f70f1ee0cac4a2068fd295072f1a44152a , < 0f000005da31f6947f843ce6b3e3a960540c6e00 (git)
Affected: 8a12f8836145ffe37e9c8733dce18c22fb668b66 , < 41c44e1f3112d7265dae522c026399b2a42d19ef (git)
Affected: 8a12f8836145ffe37e9c8733dce18c22fb668b66 , < 2ad5692db72874f02b9ad551d26345437ea4f7f3 (git)
Affected: 4.19.187 , < 4.19.189 (semver)
Affected: 5.4.112 , < 5.4.115 (semver)
Affected: 5.10.30 , < 5.10.33 (semver)
Affected: 5.11.14 , < 5.11.17 (semver)
Create a notification for this product.
Linux Linux Affected: 5.12
Unaffected: 0 , < 5.12 (semver)
Unaffected: 4.19.189 , ≤ 4.19.* (semver)
Unaffected: 5.4.115 , ≤ 5.4.* (semver)
Unaffected: 5.10.33 , ≤ 5.10.* (semver)
Unaffected: 5.11.17 , ≤ 5.11.* (semver)
Unaffected: 5.12.1 , ≤ 5.12.* (semver)
Unaffected: 5.13 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Show details on NVD website
To clipboard 

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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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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.
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  • 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.



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