Vulnerability-Lookup

GHSA-Q3JJ-FVXW-R3CF

Vulnerability from github – Published: 2026-08-10 15:33 – Updated: 2026-08-10 15:33

Details

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

drm/vc4: Shut down BO cache timer before teardown

The BO cache timer callback schedules time_work, and time_work can rearm the timer through vc4_bo_cache_free_old().

vc4_bo_cache_destroy() deletes the timer and then cancels the work, which does not break that cycle: the work being cancelled can rearm the timer, and the timer then queues work again after teardown.

Use timer_shutdown_sync() instead, so the timer cannot be rearmed and the cycle ends with cancel_work_sync().

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{
  "affected": [],
  "aliases": [
    "CVE-2026-68233"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-10T13:20:11Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/vc4: Shut down BO cache timer before teardown\n\nThe BO cache timer callback schedules time_work, and time_work can rearm\nthe timer through vc4_bo_cache_free_old().\n\nvc4_bo_cache_destroy() deletes the timer and then cancels the work, which\ndoes not break that cycle: the work being cancelled can rearm the timer,\nand the timer then queues work again after teardown.\n\nUse timer_shutdown_sync() instead, so the timer cannot be rearmed and the\ncycle ends with cancel_work_sync().",
  "id": "GHSA-q3jj-fvxw-r3cf",
  "modified": "2026-08-10T15:33:42Z",
  "published": "2026-08-10T15:33:42Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-68233"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6273dd3ffb54ec581855b82ae77331b66028249c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a38f2724eb93a78ba250b01e0caf3468df4d3956"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bac4c1a9af690b8635c6924872075c41d8763ed9"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-68233 (GCVE-0-2026-68233)

Vulnerability from cvelistv5 – Published: 2026-08-10 12:00 – Updated: 2026-08-17 05:01

Title

drm/vc4: Shut down BO cache timer before teardown

Summary

In the Linux kernel, the following vulnerability has been resolved: drm/vc4: Shut down BO cache timer before teardown The BO cache timer callback schedules time_work, and time_work can rearm the timer through vc4_bo_cache_free_old(). vc4_bo_cache_destroy() deletes the timer and then cancels the work, which does not break that cycle: the work being cancelled can rearm the timer, and the timer then queues work again after teardown. Use timer_shutdown_sync() instead, so the timer cannot be rearmed and the cycle ends with cancel_work_sync().

Severity

No CVSS data available.

Assigner

Linux mitre root

References

3 references

URL	Tags
https://git.kernel.org/stable/c/a38f2724eb93a78ba…
https://git.kernel.org/stable/c/bac4c1a9af690b863…
https://git.kernel.org/stable/c/6273dd3ffb54ec581…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: c826a6e1064419f78855463cf29ce9e8b9d25bf4 , < a38f2724eb93a78ba250b01e0caf3468df4d3956 (git) Affected: c826a6e1064419f78855463cf29ce9e8b9d25bf4 , < bac4c1a9af690b8635c6924872075c41d8763ed9 (git) Affected: c826a6e1064419f78855463cf29ce9e8b9d25bf4 , < 6273dd3ffb54ec581855b82ae77331b66028249c (git)
Linux	Linux	Affected: 4.5 Unaffected: 0 , < 4.5 (semver) Unaffected: 6.18.42 , ≤ 6.18.* (semver) Unaffected: 7.1.6 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/vc4/vc4_bo.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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          "versions": [
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              "status": "affected",
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              "versionType": "git"
            },
            {
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              "version": "c826a6e1064419f78855463cf29ce9e8b9d25bf4",
              "versionType": "git"
            }
          ]
        },
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          "product": "Linux",
          "programFiles": [
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          ],
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          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.5"
            },
            {
              "lessThan": "4.5",
              "status": "unaffected",
              "version": "0",
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            },
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            },
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              "version": "7.1.6",
              "versionType": "semver"
            },
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              "status": "unaffected",
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              "versionType": "original_commit_for_fix"
            }
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      ],
      "cpeApplicability": [
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          "nodes": [
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              "cpeMatch": [
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                  "versionStartIncluding": "4.5",
                  "vulnerable": true
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                  "versionStartIncluding": "4.5",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/vc4: Shut down BO cache timer before teardown\n\nThe BO cache timer callback schedules time_work, and time_work can rearm\nthe timer through vc4_bo_cache_free_old().\n\nvc4_bo_cache_destroy() deletes the timer and then cancels the work, which\ndoes not break that cycle: the work being cancelled can rearm the timer,\nand the timer then queues work again after teardown.\n\nUse timer_shutdown_sync() instead, so the timer cannot be rearmed and the\ncycle ends with cancel_work_sync()."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-17T05:01:21.868Z",
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        },
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          "url": "https://git.kernel.org/stable/c/6273dd3ffb54ec581855b82ae77331b66028249c"
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      ],
      "title": "drm/vc4: Shut down BO cache timer before teardown",
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    "datePublished": "2026-08-10T12:00:57.580Z",
    "dateReserved": "2026-07-30T09:28:09.376Z",
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    "state": "PUBLISHED"
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}

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.

Detection rules are retrieved from Rulezet.

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.

Action not permitted

GHSA-Q3JJ-FVXW-R3CF

CVE-2026-68233 (GCVE-0-2026-68233)

Tags

Sightings

Nomenclature