Use of Uninitialized Resource Affecting libavcodec58_134 package, versions <4.4.8-150400.3.72.1


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-SLES154-LIBAVCODEC58134-18591993
  • published8 Aug 2026
  • disclosed7 Aug 2026

Introduced: 7 Aug 2026

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

How to fix?

Upgrade SLES:15.4 libavcodec58_134 to version 4.4.8-150400.3.72.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libavcodec58_134 package and not the libavcodec58_134 package as distributed by SLES. See How to fix? for SLES:15.4 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