Vulnerability DatabaseCVE-2026-125190
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CVE-2026-125190
Published:November 09, 2026
Updated:November 13, 2026
FFmpeg through 9.0.2 contains an information disclosure vulnerability in decode_mvc2() in libavcodec/mvcdec.c that leaks uninitialized stack memory through unchecked palette indices. Attackers can supply a crafted MVC2 stream declaring few colors but referencing higher palette indices, copying process stack contents into decoded RGB frames.
Related Resources (8)
https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/125xxx/CVE-2026-125190.json
https://github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavcodec/mvcdec.c#L141
https://code.ffmpeg.org/FFmpeg/FFmpeg
https://nvd.nist.gov/vuln/detail/CVE-2026-125190
https://github.com/FFmpeg/FFmpeg
https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/25278
https://github.com/FFmpeg/FFmpeg/commit/3a5eb948e76dc6390e4b3cff7becf84bc492b7af
https://www.vulncheck.com/advisories/ffmpeg-through-9.0.2-uninitialized-stack-memory-disclosure-via-mvc2-decoder
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CVSS v4
Base Score:
4.8
Attack Vector
LOCAL
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
PASSIVE
Vulnerable System Confidentiality
LOW
Vulnerable System Integrity
NONE
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
3.3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
LOW
Integrity
NONE
Availability
NONE
Weakness Type (CWE)
Use of Uninitialized Resource
CWE-908
EPSS
Base Score:
0.13