Debian Security Advisory

DLA-2715-1 systemd -- LTS security update

Date Reported:
20 Jul 2021
Affected Packages:
Security database references:
In Mitre's CVE dictionary: CVE-2021-33910.
More information:

The Qualys Research Labs discovered that an attacker-controlled allocation using the alloca() function could result in memory corruption, allowing to crash systemd and hence the entire operating system.

Details can be found in the Qualys advisory at

For Debian 9 stretch, this problem has been fixed in version 232-25+deb9u13.

We recommend that you upgrade your systemd packages.

For the detailed security status of systemd 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: