Description
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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| FFmpeg | FFmpeg | — | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | ffmpeg | 7:9.0.2-1 | — |
| Debian 13 | ffmpeg | No fix yet | — |
| Debian 12 | ffmpeg | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | ffmpeg | No fix yet | — |
Show 7 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 26.04 LTS | ffmpeg | 7:8.0.1-3ubuntu2+esm4 | USN-8716-2 |
| Ubuntu Pro 24.04 LTS | ffmpeg | 7:6.1.1-3ubuntu5+esm13 | USN-8716-1 |
| Ubuntu Pro 22.04 LTS | ffmpeg | 7:4.4.2-0ubuntu0.22.04.1+esm15 | USN-8716-1 |
| Ubuntu Pro 20.04 LTS | ffmpeg | 7:4.2.7-0ubuntu0.1+esm16 | USN-8716-1 |
| Ubuntu Pro 18.04 LTS | ffmpeg | 7:3.4.11-0ubuntu0.1+esm15 | USN-8716-1 |
| Ubuntu Pro 16.04 LTS | ffmpeg | 7:2.8.17-0ubuntu0.1+esm17 | USN-8716-1 |
| Ubuntu Pro 14.04 LTS | libav | No fix yet | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | ffmpeg | 3.4.2-150200.11.88.1 | SUSE-SU-2026:5220-1 |
| SLES 15 SP6 | ffmpeg | 3.4.2-150200.11.88.1 | SUSE-SU-2026:5220-1 |
| SLES 15 SP5 | ffmpeg | 3.4.2-150200.11.88.1 | SUSE-SU-2026:5220-1 |
| SLES 15 SP4 | ffmpeg | 3.4.2-150200.11.88.1 | SUSE-SU-2026:5220-1 |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 15 SP6 | ffmpeg | 3.4.2-150200.11.88.1 | SUSE-SU-2026:5220-1 |
| SLES for SAP 15 SP5 | ffmpeg | 3.4.2-150200.11.88.1 | SUSE-SU-2026:5220-1 |
| SLES for SAP 15 SP4 | ffmpeg | 3.4.2-150200.11.88.1 | SUSE-SU-2026:5220-1 |
| SLE HPC 15 SP5 | ffmpeg | 3.4.2-150200.11.88.1 | SUSE-SU-2026:5220-1 |
| SLE HPC 15 SP4 | ffmpeg | 3.4.2-150200.11.88.1 | SUSE-SU-2026:5220-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | ffmpeg-4 | 4.4.8-6.1 | openSUSE-SU-2026:12064-1 |
| openSUSE Tumbleweed | ffmpeg-7 | 7.1.5-2.1 | openSUSE-SU-2026:11665-1 |
| openSUSE Tumbleweed | ffmpeg-8 | 8.1.2-3.1 | openSUSE-SU-2026:11682-1 |
| openSUSE Tumbleweed | ffmpeg-9 | 9.0.1-3.1 | openSUSE-SU-2026:11659-1 |
| openSUSE Leap 16.0 | ffmpeg-7 | 7.1.5-160000.1.1 | openSUSE-SU-2026:21877-1 |
Advisories 9
- SUSE-SU-2026:5220-1 Security update for ffmpeg SUSE / openSUSE Security Updates · Nov 13, 2026
- WID-SEC-2026-2939 ffmpeg: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 12, 2026
- openSUSE-SU-2026:12064-1 ffmpeg-4-4.4.8-6.1 on GA media SUSE / openSUSE Security Updates · Oct 7, 2026
- openSUSE-SU-2026:21877-1 Security update for ffmpeg-7 SUSE / openSUSE Security Updates · Sep 25, 2026
- USN-8716-2 ffmpeg vulnerabilities Ubuntu Security Notices (USN) · Sep 10, 2026
- openSUSE-SU-2026:11682-1 ffmpeg-8-8.1.2-3.1 on GA media SUSE / openSUSE Security Updates · Sep 5, 2026
- USN-8716-1 Several security issues were fixed in FFmpeg. Ubuntu Security Notices (USN) · Sep 3, 2026
- openSUSE-SU-2026:11665-1 ffmpeg-7-7.1.5-2.1 on GA media SUSE / openSUSE Security Updates · Sep 3, 2026
- openSUSE-SU-2026:11659-1 ffmpeg-9-libavcodec-devel-9.0.1-3.1 on GA media SUSE / openSUSE Security Updates · Sep 2, 2026
References
- Pull Request issue-tracking
- Patch Commit patch
- https://www.vulncheck.com/advisories/ffmpeg-heap-buffer-overflow-in-hvcc-box-writer-via-hevc-muxing third-party-advisory