numbers.c in libxslt before 1.1.43 has a use-after-free because, in nested XPath evaluations, an XPath context node can be modified but never restored. This is related to xsltNumbe — CVE-2025-24855
Date
Source
MSRC
MSRC
Vendor
Microsoft
Microsoft
Threat
high
high
CVSS
7.8
7.8
Summary
Advisory CVE-2025-24855. numbers.c in libxslt before 1.1.43 has a use-after-free because, in nested XPath evaluations, an XPath context node can be modified but… Vendor: Microsoft. Source: MSRC. Threat: high. CVSS 7.8. See the official…
What to do
General, cautious steps (verify details in the official source):
- Prioritize patching or mitigation immediately (treat as actively risky).
- Identify affected product versions in your inventory and verify whether you are impacted.
- Apply vendor patches/updates or recommended mitigations as soon as available.
- Read the official advisory for exact affected versions and remediation steps.