CVE-2026-68206media: v4l2-ctrls: validate HEVC active reference counts
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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In the Linux kernel, the following vulnerability has been resolved: media: v4l2-ctrls: validate HEVC active reference counts HEVC slice parameters are shared stateless V4L2 controls, but the common validation path does not verify the active L0/L1 reference counts before driver-specific code consumes them. The original report came from Cedrus, but the active count bounds are not Cedrus-specific. Validate them in the common HEVC slice control path so stateless HEVC drivers get the same basic guarantees as soon as the control is queued. Do not reject ref_idx_l0/ref_idx_l1 entries here. Existing userspace may use out-of-range sentinel values such as 0xff for missing references, and some hardware can use that information for concealment. Keep this common check limited to the active reference counts.
- CVSS
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from d395a78db9eabd12633b39e05c80e803543b6590 before 3299c3905f3fb439ebd892658b87bc76c93ae116; from d395a78db9eabd12633b39e05c80e803543b6590 before 9a998cc1c348769262d433acb7d238c5fac4b2e0; from d395a78db9eabd12633b39e05c80e803543b6590 before dbaf0e0023e2f9332c5164822def7f80b7d2c5ef; from d395a78db9eabd12633b39e05c80e803543b6590 before 3068ab802fc98b121dcb451e1f7f4d338ffc7a19; from d395a78db9eabd12633b39e05c80e803543b6590 before b01df98a6669d2b67d8aed816021b327fd905998; from d395a78db9eabd12633b39e05c80e803543b6590 before afbe4bc252d90a6f8fad869b06d5430f615f22f9 | CNA record |
References
- https://git.kernel.org/stable/c/3299c3905f3fb439ebd892658b87bc76c93ae116
- https://git.kernel.org/stable/c/9a998cc1c348769262d433acb7d238c5fac4b2e0
- https://git.kernel.org/stable/c/dbaf0e0023e2f9332c5164822def7f80b7d2c5ef
- https://git.kernel.org/stable/c/3068ab802fc98b121dcb451e1f7f4d338ffc7a19
- https://git.kernel.org/stable/c/b01df98a6669d2b67d8aed816021b327fd905998
- https://git.kernel.org/stable/c/afbe4bc252d90a6f8fad869b06d5430f615f22f9
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.