Vulnerability · Published Nov 1, 2026 · Assigned by VulnCheck

CVE-2026-120245FFmpeg 0.10 through 9.0.2 Uninitialized Memory Disclosure via Sun Raster Decoder

Medium 5.5

In plain English

A medium-severity security flaw in FFmpeg from FFmpeg. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 2% of all known vulnerabilities).

Severity (CVSS 3.1)5.5Medium

Exploit odds (30 days)0.1%top 97.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

FFmpeg 0.10 through 9.0.2 contains a use of uninitialized resource vulnerability in sunrast_decode_frame() that leaks heap memory when decoding truncated 1-bit and 4-bit paletted Sun Raster images. Attackers can craft a truncated Sun Raster file so the uncleared temporary bitmap is expanded into PAL8 pixels, exposing stale heap contents such as allocator words in decoded output.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Debian:12	ffmpeg	no fix listed	DEBIAN-CVE-2026-120245
Debian:13	ffmpeg	no fix listed	DEBIAN-CVE-2026-120245
Debian:14	ffmpeg	no fix listed	DEBIAN-CVE-2026-120245
Ubuntu:26.10	ffmpeg	no fix listed	UBUNTU-CVE-2026-120245

Affected products (as reported)

Vendor	Product	Versions
FFmpeg	FFmpeg	0.10 – through 9.0.2

Weakness: CWE-908 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

References

https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/24877 issue-tracking
https://github.com/FFmpeg/FFmpeg/commit/356a391bf57df2fb80fd61f2821c8c83d15ce180 patch
https://github.com/FFmpeg/FFmpeg/commit/66b6ca270b33fd74367d7d371f6de16ec664446e patch
https://github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavcodec/sunrast.c#L188-L194 technical-description
https://github.com/FFmpeg/FFmpeg product
VulnCheck Advisory: FFmpeg 0.10 through 9.0.2 Uninitialized Memory Disclosure via Sun Raster Decoder third-party-advisory