Vulnerability-Lookup

EUVD-2026-310134

European Vulnerability Database identifier assigned by ENISA

Reserved

2026-10-02 07:11

Assigner

ENISA

Alias of

a CVE record, shown under related vulnerabilities. This identifier carries no description, severity or references of its own: they belong to that CVE.

JSON

To clipboard

{
  "assigner": "ENISA",
  "date_reserved": "2026-10-02T07:11:18.045907+00:00",
  "id": "EUVD-2026-310134"
}

CVE-2022-48760 (GCVE-0-2022-48760)

Vulnerability from cvelistv5 – Published: 2024-06-20 11:13 – Updated: 2026-05-11 18:46

Title

USB: core: Fix hang in usb_kill_urb by adding memory barriers

Summary

In the Linux kernel, the following vulnerability has been resolved: USB: core: Fix hang in usb_kill_urb by adding memory barriers The syzbot fuzzer has identified a bug in which processes hang waiting for usb_kill_urb() to return. It turns out the issue is not unlinking the URB; that works just fine. Rather, the problem arises when the wakeup notification that the URB has completed is not received. The reason is memory-access ordering on SMP systems. In outline form, usb_kill_urb() and __usb_hcd_giveback_urb() operating concurrently on different CPUs perform the following actions: CPU 0 CPU 1 ---------------------------- --------------------------------- usb_kill_urb(): __usb_hcd_giveback_urb(): ... ... atomic_inc(&urb->reject); atomic_dec(&urb->use_count); ... ... wait_event(usb_kill_urb_queue, atomic_read(&urb->use_count) == 0); if (atomic_read(&urb->reject)) wake_up(&usb_kill_urb_queue); Confining your attention to urb->reject and urb->use_count, you can see that the overall pattern of accesses on CPU 0 is: write urb->reject, then read urb->use_count; whereas the overall pattern of accesses on CPU 1 is: write urb->use_count, then read urb->reject. This pattern is referred to in memory-model circles as SB (for "Store Buffering"), and it is well known that without suitable enforcement of the desired order of accesses -- in the form of memory barriers -- it is entirely possible for one or both CPUs to execute their reads ahead of their writes. The end result will be that sometimes CPU 0 sees the old un-decremented value of urb->use_count while CPU 1 sees the old un-incremented value of urb->reject. Consequently CPU 0 ends up on the wait queue and never gets woken up, leading to the observed hang in usb_kill_urb(). The same pattern of accesses occurs in usb_poison_urb() and the failure pathway of usb_hcd_submit_urb(). The problem is fixed by adding suitable memory barriers. To provide proper memory-access ordering in the SB pattern, a full barrier is required on both CPUs. The atomic_inc() and atomic_dec() accesses themselves don't provide any memory ordering, but since they are present, we can use the optimized smp_mb__after_atomic() memory barrier in the various routines to obtain the desired effect. This patch adds the necessary memory barriers.

Severity

No CVSS data available.

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-06-20 14:49 UTC

Assigner

Linux mitre root Scorecard

References

9 references

URL	Tags
https://git.kernel.org/stable/c/5f138ef224dffd15d…
https://git.kernel.org/stable/c/b50f5ca60475710bb…
https://git.kernel.org/stable/c/546ba238535d92525…
https://git.kernel.org/stable/c/5904dfd3ddaff3bf4…
https://git.kernel.org/stable/c/9c61fce322ac2ef7f…
https://git.kernel.org/stable/c/e3b131e30e612ff0e…
https://git.kernel.org/stable/c/9340226388c66a7e0…
https://git.kernel.org/stable/c/c9a18f7c5b071dce5…
https://git.kernel.org/stable/c/26fbe9772b8c45968…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 49367d8f1d9f26482cf7089489e90f0afd0a942c , < 5f138ef224dffd15d5e5c5b095859719e0038427 (git) Affected: 49367d8f1d9f26482cf7089489e90f0afd0a942c , < b50f5ca60475710bbc9a3af32fbfc17b1e69c2f0 (git) Affected: 49367d8f1d9f26482cf7089489e90f0afd0a942c , < 546ba238535d925254e0b3f12012a5c55801e2f3 (git) Affected: 49367d8f1d9f26482cf7089489e90f0afd0a942c , < 5904dfd3ddaff3bf4a41c3baf0a8e8f31ed4599b (git) Affected: 49367d8f1d9f26482cf7089489e90f0afd0a942c , < 9c61fce322ac2ef7fecf025285353570d60e41d6 (git) Affected: 49367d8f1d9f26482cf7089489e90f0afd0a942c , < e3b131e30e612ff0e32de6c1cb4f69f89db29193 (git) Affected: 49367d8f1d9f26482cf7089489e90f0afd0a942c , < 9340226388c66a7e090ebb00e91ed64a753b6c26 (git) Affected: 49367d8f1d9f26482cf7089489e90f0afd0a942c , < c9a18f7c5b071dce5e6939568829d40994866ab0 (git) Affected: 49367d8f1d9f26482cf7089489e90f0afd0a942c , < 26fbe9772b8c459687930511444ce443011f86bf (git)
Linux	Linux	Affected: 2.6.29 Unaffected: 0 , < 2.6.29 (semver) Unaffected: 4.4.302 , ≤ 4.4.* (semver) Unaffected: 4.9.300 , ≤ 4.9.* (semver) Unaffected: 4.14.265 , ≤ 4.14.* (semver) Unaffected: 4.19.228 , ≤ 4.19.* (semver) Unaffected: 5.4.176 , ≤ 5.4.* (semver) Unaffected: 5.10.96 , ≤ 5.10.* (semver) Unaffected: 5.15.19 , ≤ 5.15.* (semver) Unaffected: 5.16.5 , ≤ 5.16.* (semver) Unaffected: 5.17 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2022-48760",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-06-20T14:49:44.326446Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-06-20T14:50:00.838Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T15:25:01.565Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/5f138ef224dffd15d5e5c5b095859719e0038427"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/b50f5ca60475710bbc9a3af32fbfc17b1e69c2f0"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/546ba238535d925254e0b3f12012a5c55801e2f3"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/5904dfd3ddaff3bf4a41c3baf0a8e8f31ed4599b"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/9c61fce322ac2ef7fecf025285353570d60e41d6"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/e3b131e30e612ff0e32de6c1cb4f69f89db29193"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/9340226388c66a7e090ebb00e91ed64a753b6c26"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/c9a18f7c5b071dce5e6939568829d40994866ab0"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/26fbe9772b8c459687930511444ce443011f86bf"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/core/hcd.c",
            "drivers/usb/core/urb.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "5f138ef224dffd15d5e5c5b095859719e0038427",
              "status": "affected",
              "version": "49367d8f1d9f26482cf7089489e90f0afd0a942c",
              "versionType": "git"
            },
            {
              "lessThan": "b50f5ca60475710bbc9a3af32fbfc17b1e69c2f0",
              "status": "affected",
              "version": "49367d8f1d9f26482cf7089489e90f0afd0a942c",
              "versionType": "git"
            },
            {
              "lessThan": "546ba238535d925254e0b3f12012a5c55801e2f3",
              "status": "affected",
              "version": "49367d8f1d9f26482cf7089489e90f0afd0a942c",
              "versionType": "git"
            },
            {
              "lessThan": "5904dfd3ddaff3bf4a41c3baf0a8e8f31ed4599b",
              "status": "affected",
              "version": "49367d8f1d9f26482cf7089489e90f0afd0a942c",
              "versionType": "git"
            },
            {
              "lessThan": "9c61fce322ac2ef7fecf025285353570d60e41d6",
              "status": "affected",
              "version": "49367d8f1d9f26482cf7089489e90f0afd0a942c",
              "versionType": "git"
            },
            {
              "lessThan": "e3b131e30e612ff0e32de6c1cb4f69f89db29193",
              "status": "affected",
              "version": "49367d8f1d9f26482cf7089489e90f0afd0a942c",
              "versionType": "git"
            },
            {
              "lessThan": "9340226388c66a7e090ebb00e91ed64a753b6c26",
              "status": "affected",
              "version": "49367d8f1d9f26482cf7089489e90f0afd0a942c",
              "versionType": "git"
            },
            {
              "lessThan": "c9a18f7c5b071dce5e6939568829d40994866ab0",
              "status": "affected",
              "version": "49367d8f1d9f26482cf7089489e90f0afd0a942c",
              "versionType": "git"
            },
            {
              "lessThan": "26fbe9772b8c459687930511444ce443011f86bf",
              "status": "affected",
              "version": "49367d8f1d9f26482cf7089489e90f0afd0a942c",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/core/hcd.c",
            "drivers/usb/core/urb.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.29"
            },
            {
              "lessThan": "2.6.29",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.4.*",
              "status": "unaffected",
              "version": "4.4.302",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.9.*",
              "status": "unaffected",
              "version": "4.9.300",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.14.*",
              "status": "unaffected",
              "version": "4.14.265",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.19.*",
              "status": "unaffected",
              "version": "4.19.228",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.176",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.96",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.19",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.16.*",
              "status": "unaffected",
              "version": "5.16.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "5.17",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.4.302",
                  "versionStartIncluding": "2.6.29",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.9.300",
                  "versionStartIncluding": "2.6.29",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.14.265",
                  "versionStartIncluding": "2.6.29",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.19.228",
                  "versionStartIncluding": "2.6.29",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.176",
                  "versionStartIncluding": "2.6.29",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.96",
                  "versionStartIncluding": "2.6.29",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.19",
                  "versionStartIncluding": "2.6.29",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.16.5",
                  "versionStartIncluding": "2.6.29",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.17",
                  "versionStartIncluding": "2.6.29",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nUSB: core: Fix hang in usb_kill_urb by adding memory barriers\n\nThe syzbot fuzzer has identified a bug in which processes hang waiting\nfor usb_kill_urb() to return.  It turns out the issue is not unlinking\nthe URB; that works just fine.  Rather, the problem arises when the\nwakeup notification that the URB has completed is not received.\n\nThe reason is memory-access ordering on SMP systems.  In outline form,\nusb_kill_urb() and __usb_hcd_giveback_urb() operating concurrently on\ndifferent CPUs perform the following actions:\n\nCPU 0\t\t\t\t\tCPU 1\n----------------------------\t\t---------------------------------\nusb_kill_urb():\t\t\t\t__usb_hcd_giveback_urb():\n  ...\t\t\t\t\t  ...\n  atomic_inc(\u0026urb-\u003ereject);\t\t  atomic_dec(\u0026urb-\u003euse_count);\n  ...\t\t\t\t\t  ...\n  wait_event(usb_kill_urb_queue,\n\tatomic_read(\u0026urb-\u003euse_count) == 0);\n\t\t\t\t\t  if (atomic_read(\u0026urb-\u003ereject))\n\t\t\t\t\t\twake_up(\u0026usb_kill_urb_queue);\n\nConfining your attention to urb-\u003ereject and urb-\u003euse_count, you can\nsee that the overall pattern of accesses on CPU 0 is:\n\n\twrite urb-\u003ereject, then read urb-\u003euse_count;\n\nwhereas the overall pattern of accesses on CPU 1 is:\n\n\twrite urb-\u003euse_count, then read urb-\u003ereject.\n\nThis pattern is referred to in memory-model circles as SB (for \"Store\nBuffering\"), and it is well known that without suitable enforcement of\nthe desired order of accesses -- in the form of memory barriers -- it\nis entirely possible for one or both CPUs to execute their reads ahead\nof their writes.  The end result will be that sometimes CPU 0 sees the\nold un-decremented value of urb-\u003euse_count while CPU 1 sees the old\nun-incremented value of urb-\u003ereject.  Consequently CPU 0 ends up on\nthe wait queue and never gets woken up, leading to the observed hang\nin usb_kill_urb().\n\nThe same pattern of accesses occurs in usb_poison_urb() and the\nfailure pathway of usb_hcd_submit_urb().\n\nThe problem is fixed by adding suitable memory barriers.  To provide\nproper memory-access ordering in the SB pattern, a full barrier is\nrequired on both CPUs.  The atomic_inc() and atomic_dec() accesses\nthemselves don\u0027t provide any memory ordering, but since they are\npresent, we can use the optimized smp_mb__after_atomic() memory\nbarrier in the various routines to obtain the desired effect.\n\nThis patch adds the necessary memory barriers."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T18:46:24.191Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/5f138ef224dffd15d5e5c5b095859719e0038427"
        },
        {
          "url": "https://git.kernel.org/stable/c/b50f5ca60475710bbc9a3af32fbfc17b1e69c2f0"
        },
        {
          "url": "https://git.kernel.org/stable/c/546ba238535d925254e0b3f12012a5c55801e2f3"
        },
        {
          "url": "https://git.kernel.org/stable/c/5904dfd3ddaff3bf4a41c3baf0a8e8f31ed4599b"
        },
        {
          "url": "https://git.kernel.org/stable/c/9c61fce322ac2ef7fecf025285353570d60e41d6"
        },
        {
          "url": "https://git.kernel.org/stable/c/e3b131e30e612ff0e32de6c1cb4f69f89db29193"
        },
        {
          "url": "https://git.kernel.org/stable/c/9340226388c66a7e090ebb00e91ed64a753b6c26"
        },
        {
          "url": "https://git.kernel.org/stable/c/c9a18f7c5b071dce5e6939568829d40994866ab0"
        },
        {
          "url": "https://git.kernel.org/stable/c/26fbe9772b8c459687930511444ce443011f86bf"
        }
      ],
      "title": "USB: core: Fix hang in usb_kill_urb by adding memory barriers",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-48760",
    "datePublished": "2024-06-20T11:13:38.532Z",
    "dateReserved": "2024-06-20T11:09:39.059Z",
    "dateUpdated": "2026-05-11T18:46:24.191Z",
    "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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

EUVD-2026-310134

CVE-2022-48760 (GCVE-0-2022-48760)

Tags

Sightings

Nomenclature

Related by attack behaviour