{"id":"CVE-2025-40211","state":"PUBLISHED","title":"ACPI: video: Fix use-after-free in acpi_video_switch_brightness()","description":"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->brightness\nand device->backlight, 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->brightness or\ndevice->backlight.\n\nFix this by calling cancel_delayed_work_sync() for each device's\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 ]","publishedAt":"2025-11-21T10:21:36.438Z","updatedAt":"2026-06-16T19:58:39.666Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"8ab58e8e7e097bae5fe39cbc67eb93a91f7134b7","status":"affected","lessThan":"3f803ccf5a0c043e7c8b83f6665b082401fc8bee","versionType":"git"},{"version":"8ab58e8e7e097bae5fe39cbc67eb93a91f7134b7","status":"affected","lessThan":"ba1704316492a0496c69334338ea1fdbf4c2fd34","versionType":"git"},{"version":"8ab58e8e7e097bae5fe39cbc67eb93a91f7134b7","status":"affected","lessThan":"bc78a4f51d548c1ccc3d1967c2b394bf687c86e9","versionType":"git"},{"version":"8ab58e8e7e097bae5fe39cbc67eb93a91f7134b7","status":"affected","lessThan":"a63a5b6fb508d78fe57ae3b159d9ef3af7ba80e9","versionType":"git"},{"version":"8ab58e8e7e097bae5fe39cbc67eb93a91f7134b7","status":"affected","lessThan":"4e85246ec0d019dfba86ba54d841ef6694f97149","versionType":"git"},{"version":"8ab58e8e7e097bae5fe39cbc67eb93a91f7134b7","status":"affected","lessThan":"de5fc93275a4a459fe2f7cb746984f2ab3e8292a","versionType":"git"},{"version":"8ab58e8e7e097bae5fe39cbc67eb93a91f7134b7","status":"affected","lessThan":"293125536ef5521328815fa7c76d5f9eb1635659","versionType":"git"},{"version":"8ab58e8e7e097bae5fe39cbc67eb93a91f7134b7","status":"affected","lessThan":"8f067aa59430266386b83c18b983ca583faa6a11","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/acpi/acpi_video.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.17","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.17","versionType":"semver"},{"version":"5.4.302","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.247","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.197","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.159","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.117","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.58","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.17.8","status":"unaffected","lessThanOrEqual":"6.17.*","versionType":"semver"},{"version":"6.18","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/acpi/acpi_video.c"]}],"references":["https://git.kernel.org/stable/c/3f803ccf5a0c043e7c8b83f6665b082401fc8bee","https://git.kernel.org/stable/c/ba1704316492a0496c69334338ea1fdbf4c2fd34","https://git.kernel.org/stable/c/bc78a4f51d548c1ccc3d1967c2b394bf687c86e9","https://git.kernel.org/stable/c/a63a5b6fb508d78fe57ae3b159d9ef3af7ba80e9","https://git.kernel.org/stable/c/4e85246ec0d019dfba86ba54d841ef6694f97149","https://git.kernel.org/stable/c/de5fc93275a4a459fe2f7cb746984f2ab3e8292a","https://git.kernel.org/stable/c/293125536ef5521328815fa7c76d5f9eb1635659","https://git.kernel.org/stable/c/8f067aa59430266386b83c18b983ca583faa6a11"],"weaknesses":[],"ingestedAt":"2026-10-29T20:09:09.358Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/40xxx/CVE-2025-40211.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-40211","state":"PUBLISHED","datePublished":"2025-11-21T10:21:36.438Z","dateUpdated":"2026-06-16T19:58:39.666Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-04-16T07:20:57.179Z"},"containers":{"cna":{"title":"ACPI: video: Fix use-after-free in acpi_video_switch_brightness()","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->brightness\nand device->backlight, 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->brightness or\ndevice->backlight.\n\nFix this by calling cancel_delayed_work_sync() for each device's\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 ]"}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"8ab58e8e7e097bae5fe39cbc67eb93a91f7134b7","status":"affected","lessThan":"3f803ccf5a0c043e7c8b83f6665b082401fc8bee","versionType":"git"},{"version":"8ab58e8e7e097bae5fe39cbc67eb93a91f7134b7","status":"affected","lessThan":"ba1704316492a0496c69334338ea1fdbf4c2fd34","versionType":"git"},{"version":"8ab58e8e7e097bae5fe39cbc67eb93a91f7134b7","status":"affected","lessThan":"bc78a4f51d548c1ccc3d1967c2b394bf687c86e9","versionType":"git"},{"version":"8ab58e8e7e097bae5fe39cbc67eb93a91f7134b7","status":"affected","lessThan":"a63a5b6fb508d78fe57ae3b159d9ef3af7ba80e9","versionType":"git"},{"version":"8ab58e8e7e097bae5fe39cbc67eb93a91f7134b7","status":"affected","lessThan":"4e85246ec0d019dfba86ba54d841ef6694f97149","versionType":"git"},{"version":"8ab58e8e7e097bae5fe39cbc67eb93a91f7134b7","status":"affected","lessThan":"de5fc93275a4a459fe2f7cb746984f2ab3e8292a","versionType":"git"},{"version":"8ab58e8e7e097bae5fe39cbc67eb93a91f7134b7","status":"affected","lessThan":"293125536ef5521328815fa7c76d5f9eb1635659","versionType":"git"},{"version":"8ab58e8e7e097bae5fe39cbc67eb93a91f7134b7","status":"affected","lessThan":"8f067aa59430266386b83c18b983ca583faa6a11","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/acpi/acpi_video.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.17","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.17","versionType":"semver"},{"version":"5.4.302","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.247","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.197","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.159","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.117","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.58","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.17.8","status":"unaffected","lessThanOrEqual":"6.17.*","versionType":"semver"},{"version":"6.18","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/acpi/acpi_video.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/3f803ccf5a0c043e7c8b83f6665b082401fc8bee"},{"url":"https://git.kernel.org/stable/c/ba1704316492a0496c69334338ea1fdbf4c2fd34"},{"url":"https://git.kernel.org/stable/c/bc78a4f51d548c1ccc3d1967c2b394bf687c86e9"},{"url":"https://git.kernel.org/stable/c/a63a5b6fb508d78fe57ae3b159d9ef3af7ba80e9"},{"url":"https://git.kernel.org/stable/c/4e85246ec0d019dfba86ba54d841ef6694f97149"},{"url":"https://git.kernel.org/stable/c/de5fc93275a4a459fe2f7cb746984f2ab3e8292a"},{"url":"https://git.kernel.org/stable/c/293125536ef5521328815fa7c76d5f9eb1635659"},{"url":"https://git.kernel.org/stable/c/8f067aa59430266386b83c18b983ca583faa6a11"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T21:44:54.867Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.17","versionEndExcluding":"5.4.302"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.17","versionEndExcluding":"5.10.247"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.17","versionEndExcluding":"5.15.197"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.17","versionEndExcluding":"6.1.159"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.17","versionEndExcluding":"6.6.117"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.17","versionEndExcluding":"6.12.58"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.17","versionEndExcluding":"6.17.8"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.17","versionEndExcluding":"6.18"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-06-16T19:58:30.759747Z","id":"CVE-2025-40211","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-06-16T19:58:39.666Z"}}]}}}