HIGHCVSS v3.1 7.8Vulnerability
CVE-2026-125203
FFmpeg before 8.1.3 and 9.x before 9.0.2 contains a heap buffer overflow vulnerability in the Cook multichannel decoder in libavcodec/cook.c that fails to verify subpacket channel masks are disjoint. Attackers can supply a crafted RealMedia Cook stream with overlapping subpacket masks, causing cook_decode_frame() to write decoded samples beyond allocated output planes in any application decoding the file.
Properties
- Severity
- HIGH
- Nvd fetched at
- 2026-11-10T23:33:48.924589+00:00
- Epss score
- 0.00141
- Cvss severity
- HIGH
- Cvss score
- 7.8
- Retrieved at
- 2026-11-10T23:35:17+00:00
- Last source
- FIRST EPSS
- Score
- 7.8
- Cvss version
- 3.1
- Cve id
- CVE-2026-125203
- Cvss vector
- CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- First seen by Signal
- 2026-11-09T23:18:15+00:00
- Name
- CVE-2026-125203
- Vector
- CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- Published at
- 2026-11-09T19:16:56.740
- Last modified
- 2026-11-10T21:46:37.837
- Epss percentile
- 0.03476
Related Entities (1)
HAS_WEAKNESS (1)
Related research
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