Vulnerability · Published Nov 7, 2025 · Assigned by redhat
CVE-2025-7700Ffmpeg: null pointer dereference in ffmpeg als decoder (libavcodec/alsdec.c)
Medium 5.3
In plain English
A medium-severity null pointer dereference in ffmpeg. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 34% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
A flaw was found in FFmpeg’s ALS audio decoder, where it does not properly check for memory allocation failures. This can cause the application to crash when processing certain malformed audio files. While it does not lead to data theft or system control, it can be used to disrupt services and cause a denial of service.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | ffmpeg | 7:5.1.7-0+deb12u1 | DEBIAN-CVE-2025-7700 |
| Debian:12 | ffmpeg | 7:5.1.7-0+deb12u1 | DSA-5985-1 |
| Debian:13 | ffmpeg | 7:7.1.2-0+deb13u1 | DEBIAN-CVE-2025-7700 |
| Debian:13 | ffmpeg | 7:7.1.2-0+deb13u1 | DSA-6007-1 |
| Debian:14 | ffmpeg | 7:7.1.2-1 | DEBIAN-CVE-2025-7700 |
| Ubuntu:22.04:LTS | ffmpeg | no fix listed | UBUNTU-CVE-2025-7700 |
| Ubuntu:25.10 | ffmpeg | 7:7.1.1-1ubuntu4.1 | UBUNTU-CVE-2025-7700 |
| Ubuntu:25.10 | ffmpeg | 7:7.1.1-1ubuntu4.1 | USN-7871-1 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| ffmpeg | 0 – before 8.0 |
Weakness: CWE-476 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
References
- https://access.redhat.com/security/cve/CVE-2025-7700 vdb-entry, x_refsource_REDHAT
- RHBZ#2380420 issue-tracking, x_refsource_REDHAT
- https://github.com/FFmpeg/FFmpeg/commit/35a6de137a39f274d5e01ed0e0e6c4f04d0aaf07