CVE-2025-49796

Libxml: type confusion leads to denial of service (dos)

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.

Remediation

Workaround:

  • There's no available mitigation other than to avoid processing untrusted XML documents before updating to the libxml version containing the fix.

Category

9.1
CVSS
Severity: Critical
CVSS 3.1 •
EPSS 0.04%
Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com
Affected: Red Hat Red Hat Enterprise Linux 10
Affected: Red Hat Red Hat Enterprise Linux 8
Affected: Red Hat Red Hat Enterprise Linux 8
Affected: Red Hat Red Hat Enterprise Linux 9
Affected: Red Hat Red Hat Enterprise Linux 9
Affected: Red Hat Red Hat Enterprise Linux 6
Affected: Red Hat Red Hat Enterprise Linux 7
Affected: Red Hat Red Hat JBoss Core Services
Published at:
Updated at:

References

Link Tags
https://access.redhat.com/errata/RHSA-2025:10630 vendor advisory
https://access.redhat.com/errata/RHSA-2025:10698 vendor advisory
https://access.redhat.com/errata/RHSA-2025:10699 vendor advisory
https://access.redhat.com/security/cve/CVE-2025-49796 vdb entry
https://bugzilla.redhat.com/show_bug.cgi?id=2372385 issue tracking

Frequently Asked Questions

What is the severity of CVE-2025-49796?
CVE-2025-49796 has been scored as a critical severity vulnerability.
How to fix CVE-2025-49796?
As a workaround for remediating CVE-2025-49796: There's no available mitigation other than to avoid processing untrusted XML documents before updating to the libxml version containing the fix.
Is CVE-2025-49796 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2025-49796 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-49796?
CVE-2025-49796 affects Red Hat Red Hat Enterprise Linux 10, Red Hat Red Hat Enterprise Linux 8, Red Hat Red Hat Enterprise Linux 8, Red Hat Red Hat Enterprise Linux 9, Red Hat Red Hat Enterprise Linux 9, Red Hat Red Hat Enterprise Linux 6, Red Hat Red Hat Enterprise Linux 7, Red Hat Red Hat JBoss Core Services.
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