CVE-2026-125181

FFmpeg through 9.0.2 FLIC Decoder Out-of-Bounds Write via FLI_BRUN Byte Swap

Published Nov 9, 2026 CVSS 4.0 · 7.3 High EPSS < 1% KEV · Not listed
Description
FFmpeg through 9.0.2 contains an out-of-bounds write vulnerability in flic_decode_frame_15_16BPP() in libavcodec/flicvideo.c that allows attackers to corrupt heap memory on big-endian builds. Attackers can supply a crafted 15/16 bpp FLIC/FLX file with an FLI_BRUN chunk whose non-terminating byte-swap loop writes packet-derived data past the frame buffer, crashing the process.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Description FFmpeg through 9.0.2 contains an out-of-bounds write vulnerability in flic_decode_frame_15_16BPP() in libavcodec/flicvideo.c that allows attackers to corrupt heap memory on big-endian builds. Attackers can supply a crafted 15/16 bpp FLIC/FLX file with an FLI_BRUN chunk whose non-terminating byte-swap loop writes packet-derived data past the frame buffer, crashing the process.
Title FFmpeg through 9.0.2 FLIC Decoder Out-of-Bounds Write via FLI_BRUN Byte Swap
First Time appeared Ffmpeg
Ffmpeg ffmpeg
Weaknesses CWE-787
CPEs cpe:2.3:a:ffmpeg:ffmpeg:*:*:*:*:*:*:*:*
Vendors & Products Ffmpeg
Ffmpeg ffmpeg
References
Metrics cvssV3_1

{'score': 7, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 7.3, 'vector': 'CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Nov 14, 2026, 1:59 AM
Reserved
Nov 9, 2026, 6:15 PM
Status
Undergoing Analysis
Published
Nov 9, 2026, 7:16 PM
Modified
Nov 14, 2026, 2:16 AM