CVE-2026-125263
FFmpeg 9.0 through 9.0.2 Memory Exhaustion via LCEVC Enhancement Dimensions
FFmpeg 9.0 through 9.0.2 built with liblcevc_dec fails to validate LCEVC enhanced output dimensions against max_pixels in libavcodec/decode.c before frame allocation. Attackers can supply crafted H.264, HEVC or VVC streams declaring huge LCEVC resolutions to force oversized get_buffer2() allocations and exhaust memory.
Public vulnerability details
- Record state
- Published
- Published (UTC)
- Last updated (UTC)
- Assigned by
- VulnCheck
- CVSS score
- 5.7 (CVSS v4.0, from VulnCheck)
- Severity
- MEDIUM
- CISA KEV
- No KEV entry in this record. This does not show that the CVE is absent from the KEV catalog.
- Additional data from
- CISA-ADP
FHE assessment
No FHE assessment is available in this application yet. This does not mean FHE cannot mitigate an impact of this CVE.
References
- https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/25408 (VulnCheck)
- Patch Commit (VulnCheck)
- https://github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavcodec/decode.c#L1660 (VulnCheck)
- https://github.com/FFmpeg/FFmpeg (VulnCheck)
- VulnCheck Advisory: FFmpeg 9.0 through 9.0.2 Memory Exhaustion via LCEVC Enhancement Dimensions (VulnCheck)
Source
CVE JSON 5.2 record from the CVE List archive 2026-11-09_delta_CVEs_at_end_of_day.zip, which covers changes through . Imported .