media: v4l2-ctrls: validate HEVC active reference counts
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.
CVE-2026-68206
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-68206
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "d395a78db9eabd12633b39e05c80e803543b6590",
"lessThan": "3299c3905f3fb439ebd892658b87bc76c93ae116",
"versionType": "git"
},
{
"status": "affected",
"version": "d395a78db9eabd12633b39e05c80e803543b6590",
"lessThan": "9a998cc1c348769262d433acb7d238c5fac4b2e0",
"versionType": "git"
},
{
"status": "affected",
"version": "d395a78db9eabd12633b39e05c80e803543b6590",
"lessThan": "dbaf0e0023e2f9332c5164822def7f80b7d2c5ef",
"versionType": "git"
},
{
"status": "affected",
"version": "d395a78db9eabd12633b39e05c80e803543b6590",
"lessThan": "3068ab802fc98b121dcb451e1f7f4d338ffc7a19",
"versionType": "git"
},
{
"status": "affected",
"version": "d395a78db9eabd12633b39e05c80e803543b6590",
"lessThan": "b01df98a6669d2b67d8aed816021b327fd905998",
"versionType": "git"
},
{
"status": "affected",
"version": "d395a78db9eabd12633b39e05c80e803543b6590",
"lessThan": "afbe4bc252d90a6f8fad869b06d5430f615f22f9",
"versionType": "git"
}
],
"programFiles": [
"drivers/media/v4l2-core/v4l2-ctrls-core.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.14"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.14",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.1.183",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.148",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.101",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.42",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.6",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/media/v4l2-core/v4l2-ctrls-core.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-68206
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #41156 · Revision 1
- Added to Heist Feed
- Publisher date