CVE-2025-49796

Description

A vulnerability was found in libxml2. Processing certain sch:name elements from the input XML file can trigger a memory corruption issue. This flaw allows an attacker to craft a malicious XML input file that can lead libxml to crash, resulting in a denial of service or other possible undefined behavior due to sensitive data being corrupted in memory.

CVSS v3.1 Score

9.1

CRITICAL

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

Weakness Type (CWE)

CWE-125 Out-of-bounds Read

References

Other References

https://access.redhat.com/errata/RHSA-2025:10630 https://access.redhat.com/errata/RHSA-2025:10698 https://access.redhat.com/errata/RHSA-2025:10699 https://access.redhat.com/errata/RHSA-2025:11580 https://access.redhat.com/errata/RHSA-2025:12098 https://access.redhat.com/errata/RHSA-2025:12099 https://access.redhat.com/errata/RHSA-2025:12199 https://access.redhat.com/errata/RHSA-2025:12237 https://access.redhat.com/errata/RHSA-2025:12239 https://access.redhat.com/errata/RHSA-2025:12240

Frequently Asked Questions

What is CVE-2025-49796? +

A vulnerability was found in libxml2. Processing certain sch:name elements from the input XML file can trigger a memory corruption issue. This flaw allows an attacker to craft a malicious XML input file that can lead libxml to crash, resulting in a denial of service or other possible undefined behavior due to sensitive data being corrupted in memory. It has a CVSS v3.1 base score of 9.1 (CRITICAL).

How severe is CVE-2025-49796? +

CVE-2025-49796 has a CVSS v3.1 score of 9.1 out of 10, rated CRITICAL. This is a critical vulnerability that should be patched immediately.

How do I check if I'm vulnerable to CVE-2025-49796? +

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.

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