Use of Uninitialized Resource Affecting ffmpeg-4-private-devel package, versions <4.4.8-150600.13.52.1


Severity

Recommended
0.0
medium
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.25% (16th percentile)

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  • Snyk IDSNYK-SLES157-FFMPEG4PRIVATEDEVEL-18610342
  • published11 Aug 2026
  • disclosed10 Aug 2026

Introduced: 10 Aug 2026

NewCVE-2026-66038  (opens in a new tab)
CWE-908  (opens in a new tab)

How to fix?

Upgrade SLES:15.7 ffmpeg-4-private-devel to version 4.4.8-150600.13.52.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream ffmpeg-4-private-devel package and not the ffmpeg-4-private-devel package as distributed by SLES. See How to fix? for SLES:15.7 relevant fixed versions and status.

FFmpeg through 8.1.2, fixed in commit 8670835, contains an information disclosure vulnerability in the LCL/ZLIB video decoder that allows attackers to expose uninitialized heap memory by supplying a valid zlib stream that inflates to fewer bytes than the expected frame size. The zlib_decomp() function in lcldec.c treats short decompression as non-fatal and continues to the RGB24 conversion path, which copies a full frame's worth of rows from the allocation buffer using original frame dimensions, causing uninitialized heap contents including pointer-derived allocator bytes to be copied into the attacker-observable AVFrame output and potentially defeating ASLR in long-lived media processing services.

CVSS Base Scores

version 3.1