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CVE-2025-40211 (GCVE-0-2025-40211)

Vulnerability from cvelistv5 – Published: 2025-11-21 10:21 – Updated: 2026-06-16 19:58
VLAI
Title
ACPI: video: Fix use-after-free in acpi_video_switch_brightness()
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 ]
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-16 19:58 UTC
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 8ab58e8e7e097bae5fe39cbc67eb93a91f7134b7 , < 3f803ccf5a0c043e7c8b83f6665b082401fc8bee (git)
Affected: 8ab58e8e7e097bae5fe39cbc67eb93a91f7134b7 , < ba1704316492a0496c69334338ea1fdbf4c2fd34 (git)
Affected: 8ab58e8e7e097bae5fe39cbc67eb93a91f7134b7 , < bc78a4f51d548c1ccc3d1967c2b394bf687c86e9 (git)
Affected: 8ab58e8e7e097bae5fe39cbc67eb93a91f7134b7 , < a63a5b6fb508d78fe57ae3b159d9ef3af7ba80e9 (git)
Affected: 8ab58e8e7e097bae5fe39cbc67eb93a91f7134b7 , < 4e85246ec0d019dfba86ba54d841ef6694f97149 (git)
Affected: 8ab58e8e7e097bae5fe39cbc67eb93a91f7134b7 , < de5fc93275a4a459fe2f7cb746984f2ab3e8292a (git)
Affected: 8ab58e8e7e097bae5fe39cbc67eb93a91f7134b7 , < 293125536ef5521328815fa7c76d5f9eb1635659 (git)
Affected: 8ab58e8e7e097bae5fe39cbc67eb93a91f7134b7 , < 8f067aa59430266386b83c18b983ca583faa6a11 (git)
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Linux Linux Affected: 3.17
Unaffected: 0 , < 3.17 (semver)
Unaffected: 5.4.302 , ≤ 5.4.* (semver)
Unaffected: 5.10.247 , ≤ 5.10.* (semver)
Unaffected: 5.15.197 , ≤ 5.15.* (semver)
Unaffected: 6.1.159 , ≤ 6.1.* (semver)
Unaffected: 6.6.117 , ≤ 6.6.* (semver)
Unaffected: 6.12.58 , ≤ 6.12.* (semver)
Unaffected: 6.17.8 , ≤ 6.17.* (semver)
Unaffected: 6.18 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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    "vulnrichment": {
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\"8ab58e8e7e097bae5fe39cbc67eb93a91f7134b7\", \"lessThan\": \"ba1704316492a0496c69334338ea1fdbf4c2fd34\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"8ab58e8e7e097bae5fe39cbc67eb93a91f7134b7\", \"lessThan\": \"bc78a4f51d548c1ccc3d1967c2b394bf687c86e9\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"8ab58e8e7e097bae5fe39cbc67eb93a91f7134b7\", \"lessThan\": \"a63a5b6fb508d78fe57ae3b159d9ef3af7ba80e9\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"8ab58e8e7e097bae5fe39cbc67eb93a91f7134b7\", \"lessThan\": \"4e85246ec0d019dfba86ba54d841ef6694f97149\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"8ab58e8e7e097bae5fe39cbc67eb93a91f7134b7\", \"lessThan\": \"de5fc93275a4a459fe2f7cb746984f2ab3e8292a\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"8ab58e8e7e097bae5fe39cbc67eb93a91f7134b7\", \"lessThan\": \"293125536ef5521328815fa7c76d5f9eb1635659\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"8ab58e8e7e097bae5fe39cbc67eb93a91f7134b7\", \"lessThan\": \"8f067aa59430266386b83c18b983ca583faa6a11\", \"versionType\": \"git\"}], \"programFiles\": [\"drivers/acpi/acpi_video.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"3.17\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"3.17\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.4.302\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.247\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.197\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.159\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.117\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.12.58\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.12.*\"}, {\"status\": \"unaffected\", \"version\": \"6.17.8\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.17.*\"}, {\"status\": \"unaffected\", \"version\": \"6.18\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/acpi/acpi_video.c\"], \"defaultStatus\": \"affected\"}], \"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\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"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 ]\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.302\", \"versionStartIncluding\": \"3.17\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.247\", \"versionStartIncluding\": \"3.17\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.197\", \"versionStartIncluding\": \"3.17\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.159\", \"versionStartIncluding\": \"3.17\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.117\", \"versionStartIncluding\": \"3.17\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.12.58\", \"versionStartIncluding\": \"3.17\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.17.8\", \"versionStartIncluding\": \"3.17\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.18\", \"versionStartIncluding\": \"3.17\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-05-11T21:44:54.867Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2025-40211\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-06-16T19:58:39.666Z\", \"dateReserved\": \"2025-04-16T07:20:57.179Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2025-11-21T10:21:36.438Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.