CVE-2026-120245

Medium

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.

SeverityMedium

CVSS5.5

Exploit probability—

ProductFFmpeg

PublishedNov 1, 2026

First seenNov 4, 2026

Weakness typeCWE-908CWE-908

How to fix

Patches

github.com/FFmpeg/FFmpeg/commit/356a391bf57df2fb80fd61f2821c8c83d15ce180
github.com/FFmpeg/FFmpeg/commit/66b6ca270b33fd74367d7d371f6de16ec664446e

Affected products

Product	Affected versions	Fixed in
FFmpeg FFmpeg	0.10 ≤ v ≤ 9.0.2	—

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