CVE-2019-11338

Publication date 18 April 2019

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

libavcodec/hevcdec.c in FFmpeg 3.4 and 4.1.2 mishandles detection of duplicate first slices, which allows remote attackers to cause a denial of service (NULL pointer dereference and out-of-array access) or possibly have unspecified other impact via crafted HEVC data.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
ffmpeg	20.04 LTS focal	Not affected
	19.10 eoan	Not affected
	19.04 disco	Fixed in 7:4.1.3-0ubuntu1
	18.10 cosmic	Ignored end of life
	18.04 LTS bionic	Fixed in 7:3.4.6-0ubuntu0.18.04.1
	16.04 LTS xenial	Fixed in 7:2.8.17-0ubuntu0.1
	14.04 LTS trusty	Not in release

Severity score breakdown

CVSS version: CVSS v3.0

Base score 8.8 · High

Base metrics

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

Scores

Parameter	Value
Base score	8.8 · High
Exploitability score	-
Impact score	-

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References

Related Ubuntu Security Notices (USN)

USN-3967-1
FFmpeg vulnerabilities
6 May 2019

USN-4431-1
FFmpeg vulnerabilities
22 July 2020