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Debian 11: libxslt Important DoS & Info Disclosure Issue DLA-4309-1

debian lts
Calendar Grey September 25, 2025
Dist Debian Esm H88
Multiple weaknesses identified in libxslt may result in service disruption or unauthorized data exposure. An update is advised for Debian-based installations.
Two vulnerabilities were found in libxslt, an XSLT 1.0 processing library, which could lead to to denial of service or information disclosure
Topics%20covered

Topics Covered

security advisory denial of service debian important information disclosure libxslt

Summary

CVE-2023-40403

It was discovered that the generate-id() function could return
deterministic values and could leak the memory layout of different
XML objects, which might lead to information disclosure.

CVE-2025-7424

Ivan Fratric discovered a type confusion vulnerability in
xmlNode.psvi between stylesheet and source nodes. which could lead
to application crash.

For Debian 11 bullseye, these problems have been fixed in version
1.1.34-4+deb11u3.

We recommend that you upgrade your libxslt packages.

For the detailed security status of libxslt please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/source-package/libxslt

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS


Severity
important
Lowest
Low
Medium
High
Critical

Package: libxslt
Version: 1.1.34-4+deb11u3
CVE ID: CVE-2023-40403 CVE-2025-7424
Debian Bug: 1108074 1109123

Topics%20covered

Topics Covered

security advisory denial of service debian important information disclosure libxslt

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