Buffer Overflow Detected in libxml2 Impacting Red Hat Programs
CVE-2025-6021

7.5HIGH

Key Information:

Vendor

Red Hat
Status
Red Hat Enterprise Linux 10
Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 8
Vendor
CVE Published:
12 June 2025

What is CVE-2025-6021?

A vulnerability exists in the xmlBuildQName function of libxml2, where improper calculations of buffer sizes due to integer overflows can result in a stack-based buffer overflow. Attackers can exploit this flaw by supplying specially crafted input, ultimately leading to memory corruption or causing a denial of service in applications using vulnerable versions of libxml2.

References

https://access.redhat.com/security/cve/CVE-2025-6021
vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2372406
issue-trackingx_refsource_REDHAT

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Red Hat would like to thank Ahmed Lekssays for reporting this issue.
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CVE-2025-6021 : Buffer Overflow Detected in libxml2 Impacting Red Hat Programs