Ffmpeg: null pointer dereference in ffmpeg als decoder (libavcodec/alsdec.c)
Priority LOW 30CWE-476Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · Low
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-476.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00393 33rd percentileScored 2026-11-07
Fix Fixed ffmpeg: 8.0
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | ffmpeg | before 8.0 | 8.0 | Patch available | CNA |
- ffmpeg Vendor— Affected before 8.0 Fixed in 8.0 Patch available CNA
Remediation
- Fix · CNA ffmpeg Fixed in 8.0
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2025-7700
- 2026-10-03 Alias added: GHSA-p7g8-g57p-r8qx
References
Sources
- CVE-2025-7700 · CVE Program
- CVE-2025-7700 · NVD
- FIRST EPSS
- GHSA-p7g8-g57p-r8qx · GitHub Advisory Database · CC BY 4.0
- CVE-2025-7700 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences