Debian Security Advisory

DLA-2534-1 sudo -- LTS security update

Date Reported:
26 Jan 2021
Affected Packages:
Security database references:
In Mitre's CVE dictionary: CVE-2021-3156.
More information:

The Qualys Research Labs discovered a heap-based buffer overflow vulnerability in sudo, a program designed to provide limited super user privileges to specific users. Any local user (sudoers and non-sudoers) can exploit this flaw for root privilege escalation.

For Debian 9 stretch, this problem has been fixed in version 1.8.19p1-2.1+deb9u3.

We recommend that you upgrade your sudo packages.

For the detailed security status of sudo 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: