Vulnerability in Ffmpeg
CVE-2026-120244
FFmpeg 2.1 through 9.0.2 contains a use of uninitialized resource vulnerability in the PCX decoder that allows attackers to leak heap memory through truncated RLE scanlines. Attackers can craft a PCX image whose RLE data ends early, causing pcx_decode_frame() to copy uninitialized av_malloc() buffer contents into visible decoded pixels.
Published .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- code.ffmpeg.org/FFmpeg/FFmpeg/pulls/24868 (issue-tracking)
- github.com/FFmpeg/FFmpeg/commit/ecd5dfc308a164757e7f25b1afefd8db21b43cf9 (patch)
- github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavcodec/pcx.c (technical-description)
- github.com/FFmpeg/FFmpeg (product)
- www.vulncheck.com/advisories/ffmpeg-2.1-through-9.0.2-uninitialized-memory-leak… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-120244?
- CVE-2026-120244 is a medium-severity vulnerability in Ffmpeg, classified under Use of Uninitialized Resource. CVSS score: 5.5/10. Published 2026-11-01.
- How severe is CVE-2026-120244?
- Medium severity. CVSS v3 base score is 5.5 out of 10.