CVE-2026-120245

FFmpeg 0.10 through 9.0.2 Uninitialized Memory Disclosure via Sun Raster Decoder

Published Nov 1, 2026 CVSS 4.0 · 6.8 Medium EPSS < 1% KEV · Not listed
Description
FFmpeg 0.10 through 9.0.2 contains an uninitialized memory disclosure vulnerability in sunrast_decode_frame() in libavcodec/sunrast.c that leaves decoded image regions unwritten for truncated input. Attackers can supply a crafted truncated Sun Raster image, RLE-encoded or raw, to leak stale heap contents such as allocator metadata through the decoded picture.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
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. FFmpeg 0.10 through 9.0.2 contains an uninitialized memory disclosure vulnerability in sunrast_decode_frame() in libavcodec/sunrast.c that leaves decoded image regions unwritten for truncated input. Attackers can supply a crafted truncated Sun Raster image, RLE-encoded or raw, to leak stale heap contents such as allocator metadata through the decoded picture.
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title FFmpeg 0.10 through 9.0.2 Uninitialized Memory Disclosure via Sun Raster Decoder
First Time appeared Ffmpeg
Ffmpeg ffmpeg
Weaknesses CWE-908
CPEs cpe:2.3:a:ffmpeg:ffmpeg:*:*:*:*:*:*:*:*
Vendors & Products Ffmpeg
Ffmpeg ffmpeg
References
Metrics cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N'}

cvssV4_0

{'score': 6.8, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Nov 11, 2026, 2:37 AM
Reserved
Oct 31, 2026, 10:05 PM
Status
Awaiting Analysis
Published
Nov 1, 2026, 1:17 AM
Modified
Nov 11, 2026, 3:16 AM
Severity
Moderate
Public date
Nov 1, 2026, 12:57 AM