{"id":"CVE-2025-40316","state":"PUBLISHED","title":"drm/mediatek: Fix device use-after-free on unbind","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/mediatek: Fix device use-after-free on unbind\n\nA recent change fixed device reference leaks when looking up drm\nplatform device driver data during bind() but failed to remove a partial\nfix which had been added by commit 80805b62ea5b (\"drm/mediatek: Fix\nkobject put for component sub-drivers\").\n\nThis results in a reference imbalance on component bind() failures and\non unbind() which could lead to a user-after-free.\n\nMake sure to only drop the references after retrieving the driver data\nby effectively reverting the previous partial fix.\n\nNote that holding a reference to a device does not prevent its driver\ndata from going away so there is no point in keeping the reference.","publishedAt":"2025-12-08T00:46:43.210Z","updatedAt":"2026-05-23T16:02:05.577Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"7d98166183d627c0b9daca7672b2191fae0f8a03","status":"affected","lessThan":"a5a896f8315de358a2932e2c23c42d550256046a","versionType":"git"},{"version":"31ce7c089b50c3d3056c37e0e25e7535e4428ae1","status":"affected","lessThan":"0142fe895986addf35885b43440718e567121155","versionType":"git"},{"version":"1f403699c40f0806a707a9a6eed3b8904224021a","status":"affected","lessThan":"8ba827e09eb586e952d10e39406fa02d10bb591e","versionType":"git"},{"version":"1f403699c40f0806a707a9a6eed3b8904224021a","status":"affected","lessThan":"926d002e6d7e2f1fd5c1b53cf6208153ee7d380d","versionType":"git"},{"version":"fae58d0155a979a8c414bbc12db09dd4b2f910d0","status":"affected","versionType":"git"},{"version":"6.6.105","status":"affected","lessThan":"6.6.117","versionType":"semver"},{"version":"6.12.45","status":"affected","lessThan":"6.12.58","versionType":"semver"},{"version":"6.16.5","status":"affected","lessThan":"6.17","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/mediatek/mtk_drm_drv.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.17","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.17","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/gpu/drm/mediatek/mtk_drm_drv.c"]}],"references":["https://git.kernel.org/stable/c/a5a896f8315de358a2932e2c23c42d550256046a","https://git.kernel.org/stable/c/0142fe895986addf35885b43440718e567121155","https://git.kernel.org/stable/c/8ba827e09eb586e952d10e39406fa02d10bb591e","https://git.kernel.org/stable/c/926d002e6d7e2f1fd5c1b53cf6208153ee7d380d"],"weaknesses":[],"ingestedAt":"2026-10-29T20:09:09.358Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/40xxx/CVE-2025-40316.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-40316","state":"PUBLISHED","datePublished":"2025-12-08T00:46:43.210Z","dateUpdated":"2026-05-23T16:02:05.577Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-04-16T07:20:57.186Z"},"containers":{"cna":{"title":"drm/mediatek: Fix device use-after-free on unbind","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/mediatek: Fix device use-after-free on unbind\n\nA recent change fixed device reference leaks when looking up drm\nplatform device driver data during bind() but failed to remove a partial\nfix which had been added by commit 80805b62ea5b (\"drm/mediatek: Fix\nkobject put for component sub-drivers\").\n\nThis results in a reference imbalance on component bind() failures and\non unbind() which could lead to a user-after-free.\n\nMake sure to only drop the references after retrieving the driver data\nby effectively reverting the previous partial fix.\n\nNote that holding a reference to a device does not prevent its driver\ndata from going away so there is no point in keeping the reference."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"7d98166183d627c0b9daca7672b2191fae0f8a03","status":"affected","lessThan":"a5a896f8315de358a2932e2c23c42d550256046a","versionType":"git"},{"version":"31ce7c089b50c3d3056c37e0e25e7535e4428ae1","status":"affected","lessThan":"0142fe895986addf35885b43440718e567121155","versionType":"git"},{"version":"1f403699c40f0806a707a9a6eed3b8904224021a","status":"affected","lessThan":"8ba827e09eb586e952d10e39406fa02d10bb591e","versionType":"git"},{"version":"1f403699c40f0806a707a9a6eed3b8904224021a","status":"affected","lessThan":"926d002e6d7e2f1fd5c1b53cf6208153ee7d380d","versionType":"git"},{"version":"fae58d0155a979a8c414bbc12db09dd4b2f910d0","status":"affected","versionType":"git"},{"version":"6.6.105","status":"affected","lessThan":"6.6.117","versionType":"semver"},{"version":"6.12.45","status":"affected","lessThan":"6.12.58","versionType":"semver"},{"version":"6.16.5","status":"affected","lessThan":"6.17","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/mediatek/mtk_drm_drv.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.17","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.17","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/gpu/drm/mediatek/mtk_drm_drv.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/a5a896f8315de358a2932e2c23c42d550256046a"},{"url":"https://git.kernel.org/stable/c/0142fe895986addf35885b43440718e567121155"},{"url":"https://git.kernel.org/stable/c/8ba827e09eb586e952d10e39406fa02d10bb591e"},{"url":"https://git.kernel.org/stable/c/926d002e6d7e2f1fd5c1b53cf6208153ee7d380d"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-23T16:02:05.577Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6.105","versionEndExcluding":"6.6.117"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.12.45","versionEndExcluding":"6.12.58"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.17","versionEndExcluding":"6.17.8"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.17","versionEndExcluding":"6.18"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.16.5"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}