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Debian 11: libxml2 DLA-4319-1 CVE-2025-9714 DoS Threat Resolution

debian lts
Calendar Grey September 30, 2025
Dist Debian Esm H88
Security issues in libxml2 discovered; potential DoS or heap corruption vulnerabilities mitigated. Upgrade recommended.
Two security issues were found in libxml2, the GNOME XML library, which could yield denial of service or heap corruption
Topics%20covered

Topics Covered

security advisory heap corruption debian DoS libxml2 cve-2025-9714

Summary

CVE-2025-9714

It was discovered that recursion evaluation in XPath evaluation is
uncontrolled and therefore allows a local attacker to cause a stack
overflow via crafted expressions.

CVE-2025-7425

Sergei Glazunov discovered a heap-use-after-free in xmlFreeID()
caused by `atype` corruption. While the vulnerability was reported
against libxslt, the XSLT 1.0 processing library, it is now
mitigated in this libxml2 version.

For Debian 11 bullseye, this problem has been fixed in version
2.9.10+dfsg-6.7+deb11u9.

We recommend that you upgrade your libxml2 packages.

For the detailed security status of libxml2 please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/source-package/libxml2

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: libxml2
Version: 2.9.10+dfsg-6.7+deb11u9
CVE ID: CVE-2025-9714 CVE-2025-7425
Debian Bug: 1109122

Topics%20covered

Topics Covered

security advisory heap corruption debian DoS libxml2 cve-2025-9714

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