Debian Security Advisory

DLA-2573-1 libzstd -- LTS security update

Date Reported:
20 Feb 2021
Affected Packages:
Security database references:
In the Debian bugtracking system: Bug 981404, Bug 982519.
More information:

It was discovered that zstd, a compression utility, was vulnerable to a race condition: it temporarily exposed, during a very short timeframe, a world-readable version of its input even if the original file had restrictive permissions.

For Debian 9 stretch, this problem has been fixed in version 1.1.2-1+deb9u1.

We recommend that you upgrade your libzstd packages.

For the detailed security status of libzstd please refer to its security tracker page at:

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