CVE-2015-8661

Publication date 24 December 2015

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

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.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
ffmpeg	15.10 wily	Fixed 7:2.7.4-0ubuntu0.15.10.1
	15.04 vivid	Not affected
	14.04 LTS trusty	Not in release
	12.04 LTS precise	Not in release
libav	15.10 wily	Not in release
	15.04 vivid	Ignored end of life
	14.04 LTS trusty	Not affected
	12.04 LTS precise	Not affected

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
ffmpeg	Upstream: http://git.videolan.org/?p=ffmpeg.git;a=commit;h=4ea4d2f438c9a7eba37980c9a87be4b34943e4d5

Severity score breakdown

CVSS version: CVSS v3.0

Base score 8.3 · High

Base metrics

Parameter	Value
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Changed
Confidentiality impact	Low
Integrity impact	Low
Availability impact	Low

Scores

Parameter	Value
Base score	8.3 · High
Exploitability score	-
Impact score	-

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L

References

Other references

https://www.cve.org/CVERecord?id=CVE-2015-8661