Debian Security Advisory

DLA-2895-1 qt4-x11 -- LTS security update

Date Reported:
24 Jan 2022
Affected Packages:
Security database references:
In the Debian bugtracking system: Bug 986798, Bug 1002991.
In Mitre's CVE dictionary: CVE-2021-3481, CVE-2021-45930.
More information:

Multiple out-of-bounds error were discovered in qt4-x11. The highest threat from CVE-2021-3481 (at least) is to data confidentiality the application availability.

For Debian 9 stretch, these problems have been fixed in version 4:4.8.7+dfsg-11+deb9u3.

We recommend that you upgrade your qt4-x11 packages.

For the detailed security status of qt4-x11 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: