github - ghsa-v5pw-w6w2-2r5q

GHSA-V5PW-W6W2-2R5Q

Vulnerability from github – Published: 2024-10-21 18:30 – Updated: 2024-11-01 15:31

Details

In the Linux kernel, the following vulnerability has been resolved:

drm/xe/guc_submit: add missing locking in wedged_fini

Any non-wedged queue can have a zero refcount here and can be running concurrently with an async queue destroy, therefore dereferencing the queue ptr to check wedge status after the lookup can trigger UAF if queue is not wedged. Fix this by keeping the submission_state lock held around the check to postpone the free and make the check safe, before dropping again around the put() to avoid the deadlock.

(cherry picked from commit d28af0b6b9580b9f90c265a7da0315b0ad20bbfd)

Severity ?

5.5 (Medium)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2024-49943"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-667"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-10-21T18:15:15Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/xe/guc_submit: add missing locking in wedged_fini\n\nAny non-wedged queue can have a zero refcount here and can be running\nconcurrently with an async queue destroy, therefore dereferencing the\nqueue ptr to check wedge status after the lookup can trigger UAF if\nqueue is not wedged.  Fix this by keeping the submission_state lock held\naround the check to postpone the free and make the check safe, before\ndropping again around the put() to avoid the deadlock.\n\n(cherry picked from commit d28af0b6b9580b9f90c265a7da0315b0ad20bbfd)",
  "id": "GHSA-v5pw-w6w2-2r5q",
  "modified": "2024-11-01T15:31:45Z",
  "published": "2024-10-21T18:30:58Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-49943"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/790533e44bfc7af929842fccd9674c9f424d4627"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d88f9bab7e62dd0dbe983fa70cf040042a60cc84"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2024-49943 (GCVE-0-2024-49943)

Vulnerability from cvelistv5 – Published: 2024-10-21 18:02 – Updated: 2025-05-04 09:41

Summary

In the Linux kernel, the following vulnerability has been resolved: drm/xe/guc_submit: add missing locking in wedged_fini Any non-wedged queue can have a zero refcount here and can be running concurrently with an async queue destroy, therefore dereferencing the queue ptr to check wedge status after the lookup can trigger UAF if queue is not wedged. Fix this by keeping the submission_state lock held around the check to postpone the free and make the check safe, before dropping again around the put() to avoid the deadlock. (cherry picked from commit d28af0b6b9580b9f90c265a7da0315b0ad20bbfd)

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/d88f9bab7e62dd0db…
	https://git.kernel.org/stable/c/790533e44bfc7af92…

Impacted products

Vendor

Product

Version

Linux

Affected: 8ed9aaae39f39130b7a3eb2726be05d7f64b344c , < d88f9bab7e62dd0dbe983fa70cf040042a60cc84 (git)
Affected: 8ed9aaae39f39130b7a3eb2726be05d7f64b344c , < 790533e44bfc7af929842fccd9674c9f424d4627 (git)

Linux

Affected: 6.11
Unaffected: 0 , < 6.11 (semver)
Unaffected: 6.11.3 , ≤ 6.11.* (semver)
Unaffected: 6.12 , ≤ * (original_commit_for_fix)

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Sightings

Author	Source	Type	Date

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.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-V5PW-W6W2-2R5Q

CVE-2024-49943 (GCVE-0-2024-49943)

Tags

Sightings

Nomenclature