CVE-2026-125174mediumCWE-252

CVE-2026-125174: medium-severity vulnerability in FFmpeg

FFmpeg before 8.1.3 and 9.x before 9.0.2 NULL Pointer Dereference via ff_hap_set_chunk_count()

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10Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 6.8
FFmpeg before 8.1.3 and 9.x before 9.0.2 contains a NULL pointer dereference vulnerability in ff_hap_set_chunk_count() in libavcodec/hap.c, where a shadowed return variable masks reallocation failures. Attackers can supply a crafted Hap video frame with an oversized chunk count so the decoder writes through a NULL chunk table, crashing the application.
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Affected products
FFmpeg · FFmpeg
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