VDB
CVE-2026-75141
CVE-2026-75141
PUBLISHED
CVSS 8.5 HIGH
Reported by VulnCheck · Published August 19, 2026
FFmpeg before commit acf5d7c contains a heap buffer overflow in the hvcC box writer. When writing an HEVC configuration record with more NAL units of a single type than the count field can represent, the NAL unit count overflows, causing a heap buffer overflow. A crafted HEVC input file triggers the overflow during muxing.
Risk Scores
CVSS 4.0
8.5
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| FFmpeg | FFmpeg | 0 |
| FFmpeg | FFmpeg | 0, 0, 0 |
Timeline
- Aug 19, 2026 CVE Published
- Aug 20, 2026 Coalition ESS Score
- Aug 20, 2026 Security Advisory
- Aug 21, 2026 CVE Updated
- Aug 24, 2026 EPSS Score
- Sep 4, 2026 Security Advisory
- Sep 9, 2026 EPSS Score
References
- Pull Request issue-tracking
- Patch Commit patch
- third-party-advisory