Debian Security Advisory

DLA-3405-1 libxml2 -- LTS security update

Date Reported:
30 Apr 2023
Affected Packages:
Security database references:
In Mitre's CVE dictionary: CVE-2023-28484, CVE-2023-29469.
More information:

Several vulnerabilities were discovered in libxml2, a library providing support to read, modify and write XML and HTML files.

  • CVE-2023-28484

    A NULL pointer dereference flaw when parsing invalid XML schemas may result in denial of service.

  • CVE-2023-29469

    It was reported that when hashing empty strings which aren't null-terminated, xmlDictComputeFastKey could produce inconsistent results, which may lead to various logic or memory errors.

    For Debian 10 buster, these problems have been fixed in version 2.9.4+dfsg1-7+deb10u6.

    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: