Debian Security Advisory

DLA-1809-1 libav -- LTS security update

Date Reported:
29 May 2019
Affected Packages:
Security database references:
In Mitre's CVE dictionary: CVE-2018-15822, CVE-2019-11338.
More information:

Two more security issues have been corrected in multiple demuxers and decoders of the libav multimedia library.

  • CVE-2018-15822

    The flv_write_packet function in libavformat/flvenc.c in libav did not check for an empty audio packet, leading to an assertion failure.

  • CVE-2019-11338

    libavcodec/hevcdec.c in libav mishandled detection of duplicate first slices, which allowed 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.

For Debian 8 Jessie, these problems have been fixed in version 6:11.12-1~deb8u7.

We recommend that you upgrade your libav packages.

Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: