Bug 2506911 (CVE-2026-66037) - CVE-2026-66037 FFmpeg: FFmpeg: Denial of Service via uncontrolled resource consumption in IAMF demuxer
Summary: CVE-2026-66037 FFmpeg: FFmpeg: Denial of Service via uncontrolled resource co...
Keywords:
Status: NEW
Alias: CVE-2026-66037
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
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Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-07-24 20:03 UTC by OSIDB Bzimport
Modified: 2026-07-30 12:56 UTC (History)
1 user (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-07-24 20:03:00 UTC
FFmpeg through 8.1.2, fixed in commit 5d7112c, contains an uncontrolled resource consumption vulnerability in the IAMF demuxer that allows an unauthenticated attacker to cause multi-gigabyte memory allocation from a 17-byte input file by supplying a crafted count_label field. The mix_presentation_obu() function in libavformat/iamf_parse.c calls av_calloc(count_label, sizeof(*language_label)) with an attacker-controlled value before validating available OBU data, enabling an allocation amplification of approximately 126 million bytes per input byte that exhausts process memory or triggers an OOM-kill during format probing.


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