CVE-2015-6761

Severity: medium (CVSS 6.8 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2015-10-15 · updated 2026-06-17
Weakness: CWE-362

Description

The update_dimensions function in libavcodec/vp8.c in FFmpeg through 2.8.1, as used in Google Chrome before 46.0.2490.71 and other products, relies on a coefficient-partition count during multi-threaded operation, which allows remote attackers to cause a denial of service (race condition and memory corruption) or possibly have unspecified other impact via a crafted WebM file.

Affected products

FFmpeg: through 2.8.1
Google Chrome: through 45.0.2454.101

References

http://git.videolan.org/?p=ffmpeg.git%3Ba=commit%3Bh=dabea74d0e82ea80cd344f630497cafcb3ef872c
http://googlechromereleases.blogspot.com/2015/10/stable-channel-update.html
http://rhn.redhat.com/errata/RHSA-2015-1912.html
http://www.debian.org/security/2015/dsa-3376
http://www.securityfocus.com/bid/77073
http://www.securitytracker.com/id/1033816
http://www.ubuntu.com/usn/USN-2770-1
http://www.ubuntu.com/usn/USN-2770-2
https://code.google.com/p/chromium/issues/detail?id=447860
https://code.google.com/p/chromium/issues/detail?id=532967
https://codereview.chromium.org/1376913003
https://lists.debian.org/debian-lts-announce/2018/12/msg00009.html

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