CVE-2026-125207
FFmpeg through 9.0.2 Excessive Memory Allocation via Interplay ACM Decoder
CVSS Score
5.5
EPSS Score
0.0%
EPSS Percentile
0th
FFmpeg through 9.0.2 contains an uncontrolled memory allocation vulnerability in the Interplay ACM decoder that allows attackers to exhaust memory via an attacker-controlled block size. Attackers can supply a crafted ACM file with maximum level and row count in extradata, making decode_init() allocate nearly a gigabyte and deny service.
| CWE | CWE-789 |
| Vendor | ffmpeg |
| Product | ffmpeg |
| Published | Nov 9, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
FFmpeg / FFmpeg
0 ≤ 9.0.2
References
code.ffmpeg.org: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/25703 github.com: https://github.com/FFmpeg/FFmpeg/commit/6ecaddb9c1d59cf7f5de16017122fecb2fa0c67c github.com: https://github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavcodec/interplayacm.c#L101 github.com: https://github.com/FFmpeg/FFmpeg vulncheck.com: https://www.vulncheck.com/advisories/ffmpeg-through-9.0.2-excessive-memory-allocation-via-interplay-acm-decoder
Credits
Joshua Rogers (AISLE Research) Michael Niedermayer