media: v4l2-ctrls: validate HEVC active reference counts
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 6.1.183, 6.6.148, 6.12.101, 6.18.42, 7.1.6
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
- Exploitation: none
- Automatable: no
- Technical impact: total
Summary
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.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: no · Technical impact: total
- Record last updated
Affected versions
- Linux Linux
From d395a78db9eabd12633b39e05c80e803543b6590 · fixed in 3299c3905f3fb439ebd892658b87bc76c93ae116; From d395a78db9eabd12633b39e05c80e803543b6590 · fixed in 9a998cc1c348769262d433acb7d238c5fac4b2e0; From d395a78db9eabd12633b39e05c80e803543b6590 · fixed in dbaf0e0023e2f9332c5164822def7f80b7d2c5ef; From d395a78db9eabd12633b39e05c80e803543b6590 · fixed in 3068ab802fc98b121dcb451e1f7f4d338ffc7a19; From d395a78db9eabd12633b39e05c80e803543b6590 · fixed in b01df98a6669d2b67d8aed816021b327fd905998; From d395a78db9eabd12633b39e05c80e803543b6590 · fixed in afbe4bc252d90a6f8fad869b06d5430f615f22f9
- Linux Linux
5.14
- KernelLinux
From 5.14.0 · fixed in 6.1.183; From 6.2.0 · fixed in 6.6.148; From 6.7.0 · fixed in 6.12.101; From 6.13.0 · fixed in 6.18.42; From 6.19.0 · fixed in 7.1.6