Debian Security Advisory

DLA-2085-1 zlib -- LTS security update

Date Reported:
29 Jan 2020
Affected Packages:
Security database references:
In Mitre's CVE dictionary: CVE-2016-9840, CVE-2016-9841, CVE-2016-9842, CVE-2016-9843.
More information:

Several issues have been found in zlib, a compression library. They are basically about improper big-endian CRC calculation, improper left shift of negative integers and improper pointer arithmetic.

For Debian 8 Jessie, these problems have been fixed in version 1:1.2.8.dfsg-2+deb8u1.

We recommend that you upgrade your zlib packages.

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