FKIE_CVE-2026-99095

Vulnerability from fkie_nvd - Published: 2026-10-26 15:16 - Updated: 2026-10-26 15:16
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/vc4: drain the hangcheck timer and works on V3D unbind Nothing stops the hangcheck timer that submitted jobs arm, or the job_done_work that the render-done interrupt queues, at teardown: vc4_irq_disable() cancels only overflow_mem_work, and vc4_gem_destroy() runs from the drm-managed release, after vc4_v3d_unbind() has already uninstalled the V3D interrupt and cleared vc4->v3d. A timer still armed by then reads V3D registers through the NULL vc4->v3d pointer, and the late callbacks run on the vc4_dev embedding them after it has been freed. Drain them in vc4_v3d_unbind(): shut the timer down and cancel reset_work before the interrupt is taken down, because its vc4_irq_reset() re-enables it, then flush job_done_work so that completions queued at teardown still release their jobs. This issue was found by an in-house static analysis tool.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/17c5fa371de2d5508755cd4cd227cc8e2bb99240
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/94cf5971b1d04c6382437387c4dc3836cc7a1437
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a046cd60ff3f4a8c8e672b3b18902682c1f91731
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ade226dfd28cf2fd1dce143c556d1ee77d953696
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e61465d3e0292daebf4dbb34e0add635e2439569
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/vc4/vc4_v3d.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "17c5fa371de2d5508755cd4cd227cc8e2bb99240",
              "status": "affected",
              "version": "d5b1a78a772f1e31a94f8babfa964152ec5e9aa5",
              "versionType": "git"
            },
            {
              "lessThan": "a046cd60ff3f4a8c8e672b3b18902682c1f91731",
              "status": "affected",
              "version": "d5b1a78a772f1e31a94f8babfa964152ec5e9aa5",
              "versionType": "git"
            },
            {
              "lessThan": "e61465d3e0292daebf4dbb34e0add635e2439569",
              "status": "affected",
              "version": "d5b1a78a772f1e31a94f8babfa964152ec5e9aa5",
              "versionType": "git"
            },
            {
              "lessThan": "ade226dfd28cf2fd1dce143c556d1ee77d953696",
              "status": "affected",
              "version": "d5b1a78a772f1e31a94f8babfa964152ec5e9aa5",
              "versionType": "git"
            },
            {
              "lessThan": "94cf5971b1d04c6382437387c4dc3836cc7a1437",
              "status": "affected",
              "version": "d5b1a78a772f1e31a94f8babfa964152ec5e9aa5",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/vc4/vc4_v3d.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.5"
            },
            {
              "lessThan": "4.5",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.160",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.113",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.57",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/vc4: drain the hangcheck timer and works on V3D unbind\n\nNothing stops the hangcheck timer that submitted jobs arm, or the\njob_done_work that the render-done interrupt queues, at teardown:\nvc4_irq_disable() cancels only overflow_mem_work, and vc4_gem_destroy()\nruns from the drm-managed release, after vc4_v3d_unbind() has already\nuninstalled the V3D interrupt and cleared vc4-\u003ev3d. A timer still armed\nby then reads V3D registers through the NULL vc4-\u003ev3d pointer, and the\nlate callbacks run on the vc4_dev embedding them after it has been\nfreed.\n\nDrain them in vc4_v3d_unbind(): shut the timer down and cancel\nreset_work before the interrupt is taken down, because its\nvc4_irq_reset() re-enables it, then flush job_done_work so that\ncompletions queued at teardown still release their jobs.\n\nThis issue was found by an in-house static analysis tool."
    }
  ],
  "id": "CVE-2026-99095",
  "lastModified": "2026-10-26T15:16:48.500",
  "metrics": {},
  "published": "2026-10-26T15:16:48.500",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/17c5fa371de2d5508755cd4cd227cc8e2bb99240"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/94cf5971b1d04c6382437387c4dc3836cc7a1437"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a046cd60ff3f4a8c8e672b3b18902682c1f91731"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ade226dfd28cf2fd1dce143c556d1ee77d953696"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e61465d3e0292daebf4dbb34e0add635e2439569"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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