Debian Security Advisory

DLA-2669-1 libxml2 -- LTS security update

Date Reported:
30 May 2021
Affected Packages:
Security database references:
In Mitre's CVE dictionary: CVE-2021-3541.
More information:

An issue has been found in libxml2, the GNOME XML library. This issue is called "Parameter Laughs"-attack and is related to parameter entities expansion. It is similar to the "Billion Laughs"-attacks found earlier in libexpat. More information can be found at [1]


For Debian 9 stretch, this problem has been fixed in version 2.9.4+dfsg1-2.2+deb9u5.

We recommend that you upgrade your libxml2 packages.

For the detailed security status of libxml2 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: