{"id":"CVE-2026-68210","state":"PUBLISHED","title":"media: stm32: dcmi: unregister notifier on probe failure","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: stm32: dcmi: unregister notifier on probe failure\n\ndcmi_graph_init() registers the async notifier before dcmi_probe() toggles\nthe reset line. If reset_control_assert() or reset_control_deassert()\nfails afterwards, probe returns through err_cleanup and the driver core\nwill not call dcmi_remove().\n\nUnregister the notifier before cleaning it up on that error path,\nmatching the successful remove path and the V4L2 async notifier lifetime\nrules.\n\n[hverkuil: added Fixes tag]","publishedAt":"2026-08-10T12:00:29.515Z","updatedAt":"2026-08-19T16:31:34.517Z","severity":{"score":7.8,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","source":"Linux"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"d079f94c90469f413920b9f2b201537fac2ceb06","status":"affected","lessThan":"222a9301b086852b90d3b092fef436c3f4e927c4","versionType":"git"},{"version":"d079f94c90469f413920b9f2b201537fac2ceb06","status":"affected","lessThan":"37ff63c5d7119cbc5c6bacdcc658add6008a8e1f","versionType":"git"},{"version":"d079f94c90469f413920b9f2b201537fac2ceb06","status":"affected","lessThan":"6c6f22b7e6cbc4e8c1e359fc9b190419391c3db7","versionType":"git"},{"version":"d079f94c90469f413920b9f2b201537fac2ceb06","status":"affected","lessThan":"931abe1deb65b919d23fa203d7f6d6fbd4fccd8e","versionType":"git"},{"version":"d079f94c90469f413920b9f2b201537fac2ceb06","status":"affected","lessThan":"4b7ee504969e074725e439c949f2483e5fa5572a","versionType":"git"},{"version":"d079f94c90469f413920b9f2b201537fac2ceb06","status":"affected","lessThan":"084973ebd67b28f0945c5d45408f86c58b540110","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/media/platform/st/stm32/stm32-dcmi.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.20","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.20","versionType":"semver"},{"version":"6.1.183","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.148","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.101","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.42","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.6","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/media/platform/st/stm32/stm32-dcmi.c"]}],"references":["https://git.kernel.org/stable/c/222a9301b086852b90d3b092fef436c3f4e927c4","https://git.kernel.org/stable/c/37ff63c5d7119cbc5c6bacdcc658add6008a8e1f","https://git.kernel.org/stable/c/6c6f22b7e6cbc4e8c1e359fc9b190419391c3db7","https://git.kernel.org/stable/c/931abe1deb65b919d23fa203d7f6d6fbd4fccd8e","https://git.kernel.org/stable/c/4b7ee504969e074725e439c949f2483e5fa5572a","https://git.kernel.org/stable/c/084973ebd67b28f0945c5d45408f86c58b540110"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:49.727Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/68xxx/CVE-2026-68210.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-68210","state":"PUBLISHED","datePublished":"2026-08-10T12:00:29.515Z","dateUpdated":"2026-08-19T16:31:34.517Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-07-30T09:28:09.375Z"},"containers":{"cna":{"title":"media: stm32: dcmi: unregister notifier on probe failure","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: stm32: dcmi: unregister notifier on probe failure\n\ndcmi_graph_init() registers the async notifier before dcmi_probe() toggles\nthe reset line. If reset_control_assert() or reset_control_deassert()\nfails afterwards, probe returns through err_cleanup and the driver core\nwill not call dcmi_remove().\n\nUnregister the notifier before cleaning it up on that error path,\nmatching the successful remove path and the V4L2 async notifier lifetime\nrules.\n\n[hverkuil: added Fixes tag]"}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"d079f94c90469f413920b9f2b201537fac2ceb06","status":"affected","lessThan":"222a9301b086852b90d3b092fef436c3f4e927c4","versionType":"git"},{"version":"d079f94c90469f413920b9f2b201537fac2ceb06","status":"affected","lessThan":"37ff63c5d7119cbc5c6bacdcc658add6008a8e1f","versionType":"git"},{"version":"d079f94c90469f413920b9f2b201537fac2ceb06","status":"affected","lessThan":"6c6f22b7e6cbc4e8c1e359fc9b190419391c3db7","versionType":"git"},{"version":"d079f94c90469f413920b9f2b201537fac2ceb06","status":"affected","lessThan":"931abe1deb65b919d23fa203d7f6d6fbd4fccd8e","versionType":"git"},{"version":"d079f94c90469f413920b9f2b201537fac2ceb06","status":"affected","lessThan":"4b7ee504969e074725e439c949f2483e5fa5572a","versionType":"git"},{"version":"d079f94c90469f413920b9f2b201537fac2ceb06","status":"affected","lessThan":"084973ebd67b28f0945c5d45408f86c58b540110","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/media/platform/st/stm32/stm32-dcmi.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.20","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.20","versionType":"semver"},{"version":"6.1.183","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.148","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.101","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.42","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.6","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/media/platform/st/stm32/stm32-dcmi.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/222a9301b086852b90d3b092fef436c3f4e927c4"},{"url":"https://git.kernel.org/stable/c/37ff63c5d7119cbc5c6bacdcc658add6008a8e1f"},{"url":"https://git.kernel.org/stable/c/6c6f22b7e6cbc4e8c1e359fc9b190419391c3db7"},{"url":"https://git.kernel.org/stable/c/931abe1deb65b919d23fa203d7f6d6fbd4fccd8e"},{"url":"https://git.kernel.org/stable/c/4b7ee504969e074725e439c949f2483e5fa5572a"},{"url":"https://git.kernel.org/stable/c/084973ebd67b28f0945c5d45408f86c58b540110"}],"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 affected code is a platform camera-interface driver probe path on STM32 SoCs; it is reached only through local device/driver binding on the machine itself, with the resulting dangling notifier consumed by in-kernel V4L2 subdev registration. No network or remote data path reaches this code.\nAC:L - Once the driver has probe-failed on the reset line, the stale notifier remains on the global v4l2 notifier_list indefinitely, and any subsequent subdev registration deterministically walks the freed object; no race or unpredictable memory layout must be won to reach the freed dereference.\nPR:L - A local user account on the device is sufficient to interact with the media/V4L2 stack and trigger subdev registration paths that walk the corrupted global notifier list; no root or administrative capability is needed to consume the dangling pointer.\nUI:N - The stale notifier is left behind automatically by the failing probe path and is dereferenced by kernel-internal V4L2 async registration; no victim action such as opening a file or mounting a filesystem is required.\nS:U - The freed memory, the corrupted list, and the resulting impact are all within the kernel's own security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The devm-allocated stm32_dcmi object containing the notifier is freed while still linked into the global notifier_list, so reallocated heap contents are read back as notifier state and traversed as list pointers, which can be leveraged to disclose kernel memory.\nI:H - Traversal and eventual list_del of the freed notifier_entry performs writes through attacker-influenceable heap contents, giving a use-after-free list-corruption primitive that can be shaped into an arbitrary write and control-flow hijack.\nA:H - Dereferencing and unlinking a freed notifier from the global list reliably produces list corruption and an oops or panic in the V4L2 async core, taking down the kernel."}]}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-19T16:31:34.517Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.20","versionEndExcluding":"6.1.183"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.20","versionEndExcluding":"6.6.148"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.20","versionEndExcluding":"6.12.101"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.20","versionEndExcluding":"6.18.42"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.20","versionEndExcluding":"7.1.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.20","versionEndExcluding":"7.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}