CVE-2025-49795 (CVSS 7.5)

Description

A NULL pointer dereference vulnerability was found in libxml2 when processing XPath XML expressions. This flaw allows an attacker to craft a malicious XML input to libxml2, leading to a denial of service.

Is your site exposed to CVE-2025-49795?

Run a free security scan — no signup, results in seconds.

CVSS v3.1 Score

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness Type (CWE)

CWE-825 CWE-825

References

Other References

https://access.redhat.com/errata/RHSA-2025:10630 https://access.redhat.com/errata/RHSA-2025:19020 https://access.redhat.com/errata/RHSA-2026:7519 https://access.redhat.com/security/cve/CVE-2025-49795 https://bugzilla.redhat.com/show_bug.cgi?id=2372379 https://gitlab.gnome.org/GNOME/libxml2/-/issues/932

Frequently Asked Questions

What is CVE-2025-49795? +

A NULL pointer dereference vulnerability was found in libxml2 when processing XPath XML expressions. This flaw allows an attacker to craft a malicious XML input to libxml2, leading to a denial of service. It has a CVSS v3.1 base score of 7.5 (HIGH).

How severe is CVE-2025-49795? +

CVE-2025-49795 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

How do I check if I'm vulnerable to CVE-2025-49795? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

Related Vulnerabilities

CVE-2026-52924 9.8

In the Linux kernel, the following vulnerability has been resolved: sctp: purge outqueue on stale COOKIE-ECHO handling sctp_stream_update() is only …

CVE-2026-53006 9.8

In the Linux kernel, the following vulnerability has been resolved: ipv6: fix possible UAF in icmpv6_rcv() Caching saddr and daddr …

CVE-2024-23310 9.8

A use-after-free vulnerability exists in the sopen_FAMOS_read functionality of The Biosig Project libbiosig 2.5.0 and Master Branch (ab0ee111). A specially …

CVE-2025-49794 9.1

A use-after-free vulnerability was found in libxml2. This issue occurs when parsing XPath elements under certain circumstances when the XML …

CVE-2026-52952 8.8

In the Linux kernel, the following vulnerability has been resolved: iommu: Fix WARN_ON in __iommu_group_set_domain_nofail() due to reset In __iommu_group_set_domain_internal(), …

CVE-2026-7111 8.4

Text::CSV_XS versions before 1.62 for Perl have a use-after-free when registered callbacks extend the Perl argument stack, which may enable …

CVE-2025-49795