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FKIE_CVE-2025-40211

Vulnerability from fkie_nvd - Published: 2025-11-21 11:15 - Updated: 2026-06-17 09:21
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: ACPI: video: Fix use-after-free in acpi_video_switch_brightness() The switch_brightness_work delayed work accesses device->brightness and device->backlight, freed by acpi_video_dev_unregister_backlight() during device removal. If the work executes after acpi_video_bus_unregister_backlight() frees these resources, it causes a use-after-free when acpi_video_switch_brightness() dereferences device->brightness or device->backlight. Fix this by calling cancel_delayed_work_sync() for each device's switch_brightness_work in acpi_video_bus_remove_notify_handler() after removing the notify handler that queues the work. This ensures the work completes before the memory is freed. [ rjw: Changelog edit ]
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/293125536ef5521328815fa7c76d5f9eb1635659
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3f803ccf5a0c043e7c8b83f6665b082401fc8bee
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4e85246ec0d019dfba86ba54d841ef6694f97149
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8f067aa59430266386b83c18b983ca583faa6a11
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a63a5b6fb508d78fe57ae3b159d9ef3af7ba80e9
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ba1704316492a0496c69334338ea1fdbf4c2fd34
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/bc78a4f51d548c1ccc3d1967c2b394bf687c86e9
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/de5fc93275a4a459fe2f7cb746984f2ab3e8292a
Impacted products
Vendor Product Version
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{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/acpi/acpi_video.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "3f803ccf5a0c043e7c8b83f6665b082401fc8bee",
              "status": "affected",
              "version": "8ab58e8e7e097bae5fe39cbc67eb93a91f7134b7",
              "versionType": "git"
            },
            {
              "lessThan": "ba1704316492a0496c69334338ea1fdbf4c2fd34",
              "status": "affected",
              "version": "8ab58e8e7e097bae5fe39cbc67eb93a91f7134b7",
              "versionType": "git"
            },
            {
              "lessThan": "bc78a4f51d548c1ccc3d1967c2b394bf687c86e9",
              "status": "affected",
              "version": "8ab58e8e7e097bae5fe39cbc67eb93a91f7134b7",
              "versionType": "git"
            },
            {
              "lessThan": "a63a5b6fb508d78fe57ae3b159d9ef3af7ba80e9",
              "status": "affected",
              "version": "8ab58e8e7e097bae5fe39cbc67eb93a91f7134b7",
              "versionType": "git"
            },
            {
              "lessThan": "4e85246ec0d019dfba86ba54d841ef6694f97149",
              "status": "affected",
              "version": "8ab58e8e7e097bae5fe39cbc67eb93a91f7134b7",
              "versionType": "git"
            },
            {
              "lessThan": "de5fc93275a4a459fe2f7cb746984f2ab3e8292a",
              "status": "affected",
              "version": "8ab58e8e7e097bae5fe39cbc67eb93a91f7134b7",
              "versionType": "git"
            },
            {
              "lessThan": "293125536ef5521328815fa7c76d5f9eb1635659",
              "status": "affected",
              "version": "8ab58e8e7e097bae5fe39cbc67eb93a91f7134b7",
              "versionType": "git"
            },
            {
              "lessThan": "8f067aa59430266386b83c18b983ca583faa6a11",
              "status": "affected",
              "version": "8ab58e8e7e097bae5fe39cbc67eb93a91f7134b7",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/acpi/acpi_video.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.17"
            },
            {
              "lessThan": "3.17",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.302",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.247",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.197",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.159",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.117",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.58",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.17.*",
              "status": "unaffected",
              "version": "6.17.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.18",
              "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\nACPI: video: Fix use-after-free in acpi_video_switch_brightness()\n\nThe switch_brightness_work delayed work accesses device-\u003ebrightness\nand device-\u003ebacklight, freed by acpi_video_dev_unregister_backlight()\nduring device removal.\n\nIf the work executes after acpi_video_bus_unregister_backlight()\nfrees these resources, it causes a use-after-free when\nacpi_video_switch_brightness() dereferences device-\u003ebrightness or\ndevice-\u003ebacklight.\n\nFix this by calling cancel_delayed_work_sync() for each device\u0027s\nswitch_brightness_work in acpi_video_bus_remove_notify_handler()\nafter removing the notify handler that queues the work. This ensures\nthe work completes before the memory is freed.\n\n[ rjw: Changelog edit ]"
    }
  ],
  "id": "CVE-2025-40211",
  "lastModified": "2026-06-17T09:21:27.897",
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2025-40211",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-06-16T19:58:30.759747Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2025-11-21T11:15:49.513",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/293125536ef5521328815fa7c76d5f9eb1635659"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3f803ccf5a0c043e7c8b83f6665b082401fc8bee"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/4e85246ec0d019dfba86ba54d841ef6694f97149"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/8f067aa59430266386b83c18b983ca583faa6a11"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a63a5b6fb508d78fe57ae3b159d9ef3af7ba80e9"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ba1704316492a0496c69334338ea1fdbf4c2fd34"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/bc78a4f51d548c1ccc3d1967c2b394bf687c86e9"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/de5fc93275a4a459fe2f7cb746984f2ab3e8292a"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Deferred"
}



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