CVE-2015-8661

Severity: high (CVSS 8.3 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2015-12-24 · updated 2026-06-17
Weakness: CWE-119

Description

The h264_slice_header_init function in libavcodec/h264_slice.c in FFmpeg before 2.8.3 does not validate the relationship between the number of threads and the number of slices, which allows remote attackers to cause a denial of service (out-of-bounds array access) or possibly have unspecified other impact via crafted H.264 data.

Affected products

FFmpeg: through 2.8.2

References

http://git.videolan.org/?p=ffmpeg.git%3Ba=commit%3Bh=4ea4d2f438c9a7eba37980c9a87be4b34943e4d5
http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00004.html
http://www.securitytracker.com/id/1034539
https://lists.debian.org/debian-lts-announce/2018/12/msg00009.html
http://git.videolan.org/?p=ffmpeg.git%3Ba=commit%3Bh=4ea4d2f438c9a7eba37980c9a87be4b34943e4d5
http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00004.html
http://www.securitytracker.com/id/1034539
https://lists.debian.org/debian-lts-announce/2018/12/msg00009.html

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