CVE-2026-66038

Name
CVE-2026-66038
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.
NVD Severity
unknown
Other trackers
CVE, NVD, CERT, CVE Details, CIRCL, Arch Linux, Debian, Red Hat, Ubuntu, Gentoo, SUSE (Bugzilla), SUSE (CVE), Mageia
Mailing lists
oss-security, full-disclosure, bugtraq
Exploits
Exploit DB, Metasploit
Forges
GitHub (code, issues), Aports (code, issues)

References

Type URI
disclosure@vulncheck.com https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/e7cbfd1c507b57a806a5825b87d609963e862c8c
disclosure@vulncheck.com https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23626
disclosure@vulncheck.com https://www.vulncheck.com/advisories/ffmpeg-lcl-zlib-video-decoder-information-disclosure-via-lcldec-c

Match rules

CPE URI Source package Min version Max version
cpe:2.3:a:ffmpeg:ffmpeg:*:*:*:*:*:*:*:* ffmpeg >= None <= 8.1.2

Vulnerable and fixed packages

Source package Branch Version Maintainer Status
ffmpeg edge-community 8.1.2-r1 Achill Gilgenast <achill@achill.org> possibly vulnerable
ffmpeg edge-community 8.1.2-r0 Achill Gilgenast <achill@achill.org> possibly vulnerable
ffmpeg edge-community 8.1.1-r1 Achill Gilgenast <achill@achill.org> possibly vulnerable
ffmpeg edge-community 8.1.1-r0 Achill Gilgenast <achill@achill.org> possibly vulnerable
ffmpeg edge-community 8.1-r1 Achill Gilgenast <achill@achill.org> possibly vulnerable
ffmpeg edge-community 8.1-r0 Achill Gilgenast <achill@achill.org> possibly vulnerable
ffmpeg edge-community 8.0.1-r3 Achill Gilgenast <achill@achill.org> possibly vulnerable
ffmpeg edge-community 8.0.1-r2 Achill Gilgenast <achill@achill.org> possibly vulnerable
ffmpeg edge-community 8.0.1-r1 Achill Gilgenast <achill@achill.org> possibly vulnerable
ffmpeg edge-community 8.0.1-r0 Achill Gilgenast <achill@achill.org> possibly vulnerable
ffmpeg edge-community 8.0-r4 Achill Gilgenast <achill@achill.org> possibly vulnerable
ffmpeg edge-community 8.0-r3 Achill Gilgenast <achill@achill.org> possibly vulnerable
ffmpeg edge-community 8.0-r2 Achill Gilgenast <achill@achill.org> possibly vulnerable
ffmpeg edge-community 8.0-r1 Achill Gilgenast <achill@achill.org> possibly vulnerable
ffmpeg edge-community 8.0-r0 Achill Gilgenast <achill@achill.org> possibly vulnerable
ffmpeg edge-community 7.1.2-r0 Achill Gilgenast <achill@achill.org> possibly vulnerable
ffmpeg edge-community 7.1.1-r1 Achill Gilgenast <achill@achill.org> possibly vulnerable
ffmpeg edge-community 7.1.1-r0 Achill Gilgenast <achill@achill.org> possibly vulnerable
ffmpeg edge-community 6.1.2-r5 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 6.1.2-r4 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 6.1.2-r3 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 6.1.2-r2 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 6.1.2-r1 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 6.1.2-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 6.1.1-r10 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 6.1.1-r9 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 6.1.1-r8 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 6.1.1-r7 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 6.1.1-r6 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 6.1.1-r5 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 6.1.1-r4 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 6.1.1-r3 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 6.1.1-r2 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 6.1.1-r1 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 6.1.1-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 6.1-r1 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 6.1-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 6.0.1-r1 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 6.0.1-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 6.0-r27 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 6.0-r26 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 6.0-r25 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 6.0-r24 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 6.0-r23 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 6.0-r22 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 6.0-r21 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 6.0-r20 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 6.0-r19 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 6.0-r18 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 6.0-r17 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 6.0-r16 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 6.0-r15 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 6.0-r14 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 6.0-r13 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 6.0-r12 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 6.0-r10 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 6.0-r9 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 6.0-r8 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 6.0-r7 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 6.0-r6 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 6.0-r5 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 6.0-r4 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 6.0-r3 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 6.0-r2 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 6.0-r1 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 6.0-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 5.1.2-r9 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 5.1.2-r8 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 5.1.2-r7 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 5.1.2-r6 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 5.1.2-r5 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 5.1.2-r4 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 5.1.2-r3 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 5.1.2-r2 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 5.1.2-r1 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 5.1.1-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 5.1-r5 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 5.1-r4 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 5.1-r3 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 5.1-r2 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 5.1-r1 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 5.1-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 5.0.1-r4 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 5.0.1-r3 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 5.0.1-r2 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 5.0.1-r1 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 5.0.1-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 5.0-r3 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 5.0-r2 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 5.0-r1 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 5.0-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 4.4.1-r3 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 4.4.1-r2 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 4.4.1-r1 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 4.4.1-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 4.4-r4 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 4.4-r3 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 4.4-r2 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 4.4-r1 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 4.4-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
ffmpeg edge-community 4.3.2-r0 None possibly vulnerable
ffmpeg edge-community 4.3.1-r0 None possibly vulnerable
ffmpeg edge-community 4.3-r0 None possibly vulnerable
ffmpeg edge-community 4.2.1-r0 None possibly vulnerable
ffmpeg edge-community 4.2-r0 None possibly vulnerable
ffmpeg edge-community 4.1.4-r0 None possibly vulnerable
ffmpeg edge-community 4.1.3-r0 None possibly vulnerable
ffmpeg edge-community 4.1.1-r0 None possibly vulnerable
ffmpeg edge-community 4.1-r0 None possibly vulnerable
ffmpeg edge-community 4.0.2-r0 None possibly vulnerable
ffmpeg edge-community 4.0.1-r0 None possibly vulnerable
ffmpeg edge-community 4.0.0-r0 None possibly vulnerable
ffmpeg edge-community 3.4.4-r0 None possibly vulnerable
ffmpeg edge-community 3.4.3-r0 None possibly vulnerable
ffmpeg edge-community 3.3.4-r0 None possibly vulnerable
ffmpeg 3.24-community 8.1.2-r0 Achill Gilgenast <achill@achill.org> possibly vulnerable
ffmpeg 3.24-community 8.1.1-r0 Achill Gilgenast <achill@achill.org> possibly vulnerable