{"dataType":"CVE_RECORD","cveMetadata":{"cveId":"CVE-2023-52491","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2024-02-20T12:30:33.303Z","datePublished":"2024-02-29T15:52:09.891Z","dateUpdated":"2026-08-05T09:10:13.876Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-08-05T09:10:13.876Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: mtk-jpeg: Fix use after free bug due to error path handling in mtk_jpeg_dec_device_run\n\nIn mtk_jpeg_probe, &jpeg->job_timeout_work is bound with\nmtk_jpeg_job_timeout_work.\n\nIn mtk_jpeg_dec_device_run, if error happens in\nmtk_jpeg_set_dec_dst, it will finally start the worker while\nmark the job as finished by invoking v4l2_m2m_job_finish.\n\nThere are two methods to trigger the bug. If we remove the\nmodule, it which will call mtk_jpeg_remove to make cleanup.\nThe possible sequence is as follows, which will cause a\nuse-after-free bug.\n\nCPU0                  CPU1\nmtk_jpeg_dec_...    |\n  start worker\t    |\n                    |mtk_jpeg_job_timeout_work\nmtk_jpeg_remove     |\n  v4l2_m2m_release  |\n    kfree(m2m_dev); |\n                    |\n                    | v4l2_m2m_get_curr_priv\n                    |   m2m_dev->curr_ctx //use\n\nIf we close the file descriptor, which will call mtk_jpeg_release,\nit will have a similar sequence.\n\nFix this bug by starting timeout worker only if started jpegdec worker\nsuccessfully. Then v4l2_m2m_job_finish will only be called in\neither mtk_jpeg_job_timeout_work or mtk_jpeg_dec_device_run."}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH"},"scenarios":[{"lang":"en","value":"AV:L - The bug is reached via the Mediatek JPEG V4L2 m2m device node (/dev/videoN) through ordinary open/ioctl/STREAMON/qbuf and close() paths in mtk_jpeg_dec_device_run, requiring local process access rather than network or adjacent packet delivery.\nAC:L - An attacker can deterministically force the mtk_jpeg_set_dec_dst error path (plane/size mismatch under their control), which schedules the 1s job_timeout_work and then job_finish; they fully control the subsequent close or a second decode session that races the dangling timeout, so success does not depend on conditions outside their control.\nPR:L - mtk_jpeg_open has no capability checks; triggering the path only needs access to the JPEG codec video node at unprivileged video-group/media-process level, not real root or init-namespace admin rights.\nUI:N - The attacker performs the entire open, queue, intentional decode-error, and close/second-session sequence themselves; no victim mount, open, or other interactive action is required.\nS:U - The use-after-free corrupts host-kernel m2m/context/buffer state within a single kernel security authority and does not cross a VM, IOMMU, or sandbox boundary.\nC:H - The dangling timeout worker calls v4l2_m2m_get_curr_priv and operates on freed or wrong-context m2m/buffer objects after release or cross-session reuse, enabling reclaim-based arbitrary kernel memory disclosure as with other heap UAFs.\nI:H - The same worker path can double-finish jobs, reset HW, and manipulate freed or concurrently active buffer/context state, providing heap corruption and control-flow hijack primitives consistent with UAF guidance.\nA:H - Use-after-free or NULL dereference in mtk_jpeg_job_timeout_work reliably causes kernel oops/panic, so availability impact is High."}]}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/media/platform/mediatek/jpeg/mtk_jpeg_core.c"],"versions":[{"version":"b2f0d2724ba477d326e9d654d4db1c93e98f8b93","lessThan":"43872f44eee6c6781fea1348b38885d8e78face9","status":"affected","versionType":"git"},{"version":"b2f0d2724ba477d326e9d654d4db1c93e98f8b93","lessThan":"1b1036c60a37a30caf6759a90fe5ecd06ec35590","status":"affected","versionType":"git"},{"version":"b2f0d2724ba477d326e9d654d4db1c93e98f8b93","lessThan":"9fec4db7fff54d9b0306a332bab31eac47eeb5f6","status":"affected","versionType":"git"},{"version":"b2f0d2724ba477d326e9d654d4db1c93e98f8b93","lessThan":"8254d54d00eb6cdb8367399c7f912eb8d354ecd7","status":"affected","versionType":"git"},{"version":"b2f0d2724ba477d326e9d654d4db1c93e98f8b93","lessThan":"6e2f37022f0fc0893da4d85a0500c9d547fffd4c","status":"affected","versionType":"git"},{"version":"b2f0d2724ba477d326e9d654d4db1c93e98f8b93","lessThan":"206c857dd17d4d026de85866f1b5f0969f2a109e","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/media/platform/mediatek/jpeg/mtk_jpeg_core.c"],"versions":[{"version":"4.12","status":"affected"},{"version":"0","lessThan":"4.12","status":"unaffected","versionType":"semver"},{"version":"5.10.210","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.149","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.76","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.15","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.7.3","lessThanOrEqual":"6.7.*","status":"unaffected","versionType":"semver"},{"version":"6.8","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"5.10.210"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"5.15.149"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"6.1.76"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"6.6.15"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"6.7.3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"6.8"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/43872f44eee6c6781fea1348b38885d8e78face9"},{"url":"https://git.kernel.org/stable/c/1b1036c60a37a30caf6759a90fe5ecd06ec35590"},{"url":"https://git.kernel.org/stable/c/9fec4db7fff54d9b0306a332bab31eac47eeb5f6"},{"url":"https://git.kernel.org/stable/c/8254d54d00eb6cdb8367399c7f912eb8d354ecd7"},{"url":"https://git.kernel.org/stable/c/6e2f37022f0fc0893da4d85a0500c9d547fffd4c"},{"url":"https://git.kernel.org/stable/c/206c857dd17d4d026de85866f1b5f0969f2a109e"}],"title":"media: mtk-jpeg: Fix use after free bug due to error path handling in mtk_jpeg_dec_device_run","x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2024-08-02T23:03:19.948Z"},"title":"CVE Program 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