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Vulnerabilities

Vulnerability · CVE-2025-49794

A use-after-free vulnerability was found in libxml2.

Published Jun 16, 2025 · catalog updated Oct 12, 2026 · Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On

Check this week

CVE-2025-49794 is not in CISA KEV. FIRST estimates a 83.00% chance of exploitation in the next 30 days. Check whether you run Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Critical9.1
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
83.00%
Remediation
Vendor / distro source
Affected products
vendor Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On patch: 0:2.9.7-9.el8_4.6

A use-after-free vulnerability was found in libxml2. This issue occurs when parsing XPath elements under certain circumstances when the XML schematron has the schema elements. This flaw allows a malicious actor to craft a malicious XML document used as input for libxml, resulting in the program's crash using libxml or other possible undefined behaviors.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On patch: 0:2.9.7-9.el8_4.6patch: 0:2.9.7-9.el8_4.6

How to fix CVE-2025-49794

  • Recommended remediation

    A vendor or distribution source is linked. Check that advisory for patch availability; this catalog does not invent fix status.

  • Official advisories

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2025-49794 is not in CISA KEV. FIRST estimates a 83.00% chance of exploitation in the next 30 days. Check whether you run Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On.

Which versions are affected?

Compare what you have installed with Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On patch: 0:2.9.7-9.el8_4.6 patch: 0:2.9.7-9.el8_4.6. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 83.00%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Jun 16, 2025 · EUVD

    Detected

    A use-after-free vulnerability was found in libxml2. This issue occurs when parsing XPath elements under certain circumstances when the XML schematron has the schema elements. This flaw allows a malicious actor to craft a malicious XML document used as input for libxml, resulting in the program's crash using libxml or other possible undefined behaviors.

  2. Oct 12, 2026 · EUVD

    Updated

    A use-after-free vulnerability was found in libxml2. This issue occurs when parsing XPath elements under certain circumstances when the XML schematron has the schema elements. This flaw allows a malicious actor to craft a malicious XML document used as input for libxml, resulting in the program's crash using libxml or other possible undefined behaviors.

Sources

  • EUVDVulnerability recordEUVD-2025-18412

    A use-after-free vulnerability was found in libxml2. This issue occurs when parsing XPath elements under certain circumstances when the XML schematron has the schema elements. This flaw allows a malicious actor to craft a malicious XML document used as input for libxml, resulting

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Oct 12, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.