vulnerability
Ubuntu: USN-7694-1 (CVE-2025-6021): libxml2 vulnerabilities
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 8 | (AV:N/AC:L/Au:N/C:N/I:N/A:C) | Jun 12, 2025 | Aug 21, 2025 | Feb 9, 2026 |
Severity
8
CVSS
(AV:N/AC:L/Au:N/C:N/I:N/A:C)
Published
Jun 12, 2025
Added
Aug 21, 2025
Modified
Feb 9, 2026
Description
A flaw was found in libxml2's xmlBuildQName function, where integer overflows in buffer size calculations can lead to a stack-based buffer overflow. This issue can result in memory corruption or a denial of service when processing crafted input.
Solutions
ubuntu-pro-upgrade-libxml2ubuntu-pro-upgrade-python-libxml2ubuntu-pro-upgrade-python3-libxml2
References
- CVE-2025-6021
- https://attackerkb.com/topics/CVE-2025-6021
- CWE-190
- CWE-787
- UBUNTU-USN-7694-1
- URL-https://access.redhat.com/security/cve/CVE-2025-6021
- URL-https://bugzilla.redhat.com/show_bug.cgi?id=2372406
- URL-https://gitlab.gnome.org/GNOME/libxml2/-/issues/926
- URL-https://ubuntu.com/security/notices/USN-7694-1
- URL-https://www.cve.org/CVERecord?id=CVE-2025-6021
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