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
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7180 records in the last 180 days details
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)
guessed Create a notification for this product.
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.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-40211",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-16T19:58:30.759747Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-06-16T19:58:39.666Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "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"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.302",
                  "versionStartIncluding": "3.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.247",
                  "versionStartIncluding": "3.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.197",
                  "versionStartIncluding": "3.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.159",
                  "versionStartIncluding": "3.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.117",
                  "versionStartIncluding": "3.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.58",
                  "versionStartIncluding": "3.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.17.8",
                  "versionStartIncluding": "3.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18",
                  "versionStartIncluding": "3.17",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "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 ]"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T21:44:54.867Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "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"
        }
      ],
      "title": "ACPI: video: Fix use-after-free in acpi_video_switch_brightness()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-40211",
    "datePublished": "2025-11-21T10:21:36.438Z",
    "dateReserved": "2025-04-16T07:20:57.179Z",
    "dateUpdated": "2026-06-16T19:58:39.666Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2025-40211",
      "date": "2026-10-28",
      "epss": "0.0021",
      "percentile": "0.11145"
    },
    "microsoft_vex": {
      "current_release_date": "2025-12-02T14:35:54.000Z",
      "cve": "CVE-2025-40211",
      "id": "msrc_CVE-2025-40211",
      "initial_release_date": "2025-11-02T00:00:00.000Z",
      "product_status:fixed": "1",
      "product_status:known_affected": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "ACPI: video: Fix use-after-free in acpi_video_switch_brightness()",
      "url": "https://msrc.microsoft.com/csaf/vex/2025/msrc_cve-2025-40211.json",
      "version": "2"
    },
    "nvd": {
      "cve": {
        "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 ]"
          },
          {
            "lang": "es",
            "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nACPI: video: Correcci\u00f3n de uso despu\u00e9s de liberaci\u00f3n en acpi_video_switch_brightness()\n\nEl trabajo retrasado switch_brightness_work accede a device  -\u003e  brightness y device  -\u003e  backlight, liberados por acpi_video_dev_unregister_backlight() durante la eliminaci\u00f3n del dispositivo.\n\nSi el trabajo se ejecuta despu\u00e9s de que acpi_video_bus_unregister_backlight() libera estos recursos, causa un uso despu\u00e9s de liberaci\u00f3n cuando acpi_video_switch_brightness() desreferencia device  -\u003e  brightness o device  -\u003e  backlight.\n\nEsto se soluciona llamando a cancel_delayed_work_sync() para el switch_brightness_work de cada dispositivo en acpi_video_bus_remove_notify_handler() despu\u00e9s de eliminar el gestor de notificaci\u00f3n que encola el trabajo. Esto asegura que el trabajo se complete antes de que se libere la memoria.\n\n[ rjw: Edici\u00f3n del registro de cambios ]"
          }
        ],
        "id": "CVE-2025-40211",
        "lastModified": "2026-10-19T19:10:00.130",
        "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"
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-30T02:56:58+00:00",
      "cve": "CVE-2025-40211",
      "id": "CVE-2025-40211",
      "initial_release_date": "2025-11-21T00:00:00+00:00",
      "product_status:known_affected": "232",
      "product_status:known_not_affected": "42",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: ACPI: video: Fix use-after-free in acpi_video_switch_brightness()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-40211.json",
      "version": "3"
    },
    "vulnrichment": {
      "containers": {
        "adp": [
          {
            "metrics": [
              {
                "other": {
                  "content": {
                    "id": "CVE-2025-40211",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "partial"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2026-06-16T19:58:30.759747Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2026-06-16T19:58:35.404Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "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"
                }
              ]
            }
          ],
          "cpeApplicability": [
            {
              "nodes": [
                {
                  "cpeMatch": [
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.4.302",
                      "versionStartIncluding": "3.17",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.10.247",
                      "versionStartIncluding": "3.17",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.15.197",
                      "versionStartIncluding": "3.17",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.1.159",
                      "versionStartIncluding": "3.17",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.6.117",
                      "versionStartIncluding": "3.17",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.12.58",
                      "versionStartIncluding": "3.17",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.17.8",
                      "versionStartIncluding": "3.17",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.18",
                      "versionStartIncluding": "3.17",
                      "vulnerable": true
                    }
                  ],
                  "negate": false,
                  "operator": "OR"
                }
              ]
            }
          ],
          "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 ]"
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-05-11T21:44:54.867Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "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"
            }
          ],
          "title": "ACPI: video: Fix use-after-free in acpi_video_switch_brightness()",
          "x_generator": {
            "engine": "bippy-1.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2025-40211",
        "datePublished": "2025-11-21T10:21:36.438Z",
        "dateReserved": "2025-04-16T07:20:57.179Z",
        "dateUpdated": "2026-06-16T19:58:39.666Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

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.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON

Loading timeline…




    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.