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Fri, 24 Jul 2026 23:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Ffmpeg
Ffmpeg ffmpeg |
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| Vendors & Products |
Ffmpeg
Ffmpeg ffmpeg |
Fri, 24 Jul 2026 21:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
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Fri, 24 Jul 2026 20:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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. | |
| Title | FFmpeg LCL/ZLIB Video Decoder Information Disclosure via lcldec.c | |
| Weaknesses | CWE-908 | |
| References |
| |
| Metrics |
cvssV3_1
|
Projects
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Status: PUBLISHED
Assigner: VulnCheck
Published:
Updated: 2026-07-24T20:14:17.998Z
Reserved: 2026-07-23T20:45:17.816Z
Link: CVE-2026-66038
Updated: 2026-07-24T20:14:14.026Z
No data.
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OpenCVE Enrichment
Updated: 2026-07-24T23:15:04Z