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.
CVSS Details
- CVSS 4.0 Base Score: 8.5 (HIGH)
- CVSS 4.0 Vector: (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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X)
- CVSS 3.1 Base Score: 7.8
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Ubuntu | — | Upgrade ffmpeg (Ubuntu Pro)Upgrade libavcodec-extra60 (Ubuntu Pro)Upgrade libavfilter11 (Ubuntu Pro)Upgrade libavformat-extra62 (Ubuntu Pro)Upgrade libavcodec-extra57 (Ubuntu Pro)Upgrade libavcodec57 (Ubuntu Pro)Upgrade libavformat57 (Ubuntu Pro)Upgrade libavformat-ffmpeg56 (Ubuntu Pro)Upgrade libavfilter9 (Ubuntu Pro)Upgrade libavformat60 (Ubuntu Pro)Upgrade libavformat-extra58 (Ubuntu Pro)Upgrade libavcodec60 (Ubuntu Pro)Upgrade libavformat58 (Ubuntu Pro)Upgrade libavfilter7 (Ubuntu Pro)Upgrade libavcodec58 (Ubuntu Pro)Upgrade libavfilter6 (Ubuntu Pro)Upgrade libavcodec-extra58 (Ubuntu Pro)Upgrade libavcodec62 (Ubuntu Pro)Upgrade libavformat-extra60 (Ubuntu Pro)Upgrade libavfilter-ffmpeg5 (Ubuntu Pro)Upgrade libavcodec-ffmpeg-extra56 (Ubuntu Pro)Upgrade libavcodec-ffmpeg56 (Ubuntu Pro)Upgrade libavcodec-extra62 (Ubuntu Pro)Upgrade libavformat62 (Ubuntu Pro) | Sep 14, 2026 | Sep 3, 2026 |
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