CVE-2026-68210 (GCVE-0-2026-68210)

Vulnerability from cvelistv5 – Published: 2026-08-10 12:00 – Updated: 2026-08-19 16:31
VLAI
Title
media: stm32: dcmi: unregister notifier on probe failure
Summary
In the Linux kernel, the following vulnerability has been resolved: media: stm32: dcmi: unregister notifier on probe failure dcmi_graph_init() registers the async notifier before dcmi_probe() toggles the reset line. If reset_control_assert() or reset_control_deassert() fails afterwards, probe returns through err_cleanup and the driver core will not call dcmi_remove(). Unregister the notifier before cleaning it up on that error path, matching the successful remove path and the V4L2 async notifier lifetime rules. [hverkuil: added Fixes tag]
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: d079f94c90469f413920b9f2b201537fac2ceb06 , < 222a9301b086852b90d3b092fef436c3f4e927c4 (git)
Affected: d079f94c90469f413920b9f2b201537fac2ceb06 , < 37ff63c5d7119cbc5c6bacdcc658add6008a8e1f (git)
Affected: d079f94c90469f413920b9f2b201537fac2ceb06 , < 6c6f22b7e6cbc4e8c1e359fc9b190419391c3db7 (git)
Affected: d079f94c90469f413920b9f2b201537fac2ceb06 , < 931abe1deb65b919d23fa203d7f6d6fbd4fccd8e (git)
Affected: d079f94c90469f413920b9f2b201537fac2ceb06 , < 4b7ee504969e074725e439c949f2483e5fa5572a (git)
Affected: d079f94c90469f413920b9f2b201537fac2ceb06 , < 084973ebd67b28f0945c5d45408f86c58b540110 (git)
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Linux Linux Affected: 4.20
Unaffected: 0 , < 4.20 (semver)
Unaffected: 6.1.183 , ≤ 6.1.* (semver)
Unaffected: 6.6.148 , ≤ 6.6.* (semver)
Unaffected: 6.12.101 , ≤ 6.12.* (semver)
Unaffected: 6.18.42 , ≤ 6.18.* (semver)
Unaffected: 7.1.6 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
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{
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          "product": "Linux",
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            "drivers/media/platform/st/stm32/stm32-dcmi.c"
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              "version": "7.1.6",
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              "version": "7.2",
              "versionType": "original_commit_for_fix"
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          "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]"
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              "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\u0027s 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."
            }
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        "shortName": "Linux"
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    "cveId": "CVE-2026-68210",
    "datePublished": "2026-08-10T12:00:29.515Z",
    "dateReserved": "2026-07-30T09:28:09.375Z",
    "dateUpdated": "2026-08-19T16:31:34.517Z",
    "state": "PUBLISHED"
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      "date": "2026-08-20",
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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-14T14:01:01+00:00",
      "cve": "CVE-2026-68210",
      "id": "CVE-2026-68210",
      "initial_release_date": "2026-08-10T00:00:00+00:00",
      "product_status:known_affected": "1",
      "product_status:known_not_affected": "275",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: media: stm32: dcmi: unregister notifier on probe failure",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-68210.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-14T00:53:20Z",
      "cve": "CVE-2026-68210",
      "id": "CVE-2026-68210",
      "initial_release_date": "2026-08-13T16:22:57Z",
      "product_status:known_affected": "156",
      "product_status:known_not_affected": "140",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-68210",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-68210.json",
      "version": "3"
    }
  }
}



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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

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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.