Stack-based buffer overflow in Libxml2 - CVE-2025-6170

Vulnerability identifier: #VU111224

CSH Severity: High

CVSS v4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2025-6170

CWE-ID: CWE-121

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error in xmllint Shell - shell.c. A remote attacker can pass specially crafted input to the application, trigger a stack-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Libxml2
LANTIME Operating System Firmware (LTOS)
Anolis OS
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for ARM 64
openEuler
Tenable Nessus
libxml2 (Red Hat package)
python3-libxml2
libxml2-devel
libxml2
libxml2-help
libxml2-debuginfo
libxml2-debugsource
python2-libxml2
libxml2-static
libxml2-doc

Install updates from vendor's website.

LANTIME Operating System Firmware (LTOS) - update to 7.10.004
Tenable Nessus - addressed in versions 10.8.0, 10.8.1, 10.8.2, 10.8.3, 10.8.4, 10.8.5, 10.8.6, 10.9.6, 10.11.1
libxml2 (Red Hat package) - update to 2.9.7-21.el8_10.6
python3-libxml2 - addressed in versions 2.9.7-21.0.1, 2.11.5-14
libxml2-devel - addressed in versions 2.9.7-21.0.1, 2.11.5-14
libxml2 - addressed in versions 2.9.7-21.0.1, 2.11.5-14
libxml2-help - addressed in versions 2.9.10-48, 2.9.14-20, 2.11.5-9, 2.11.9-6
libxml2 - addressed in versions 2.9.10-48, 2.9.14-20, 2.11.5-9, 2.11.9-6
libxml2-debuginfo - addressed in versions 2.9.10-48, 2.9.14-20, 2.11.5-9, 2.11.9-6
libxml2-debugsource - addressed in versions 2.9.10-48, 2.9.14-20, 2.11.5-9, 2.11.9-6
libxml2-devel - addressed in versions 2.9.10-48, 2.9.14-20, 2.11.5-9, 2.11.9-6
python2-libxml2 - update to 2.9.10-48
python3-libxml2 - addressed in versions 2.9.10-48, 2.9.14-20, 2.11.5-9, 2.11.9-6
libxml2-static - update to 2.11.5-14
libxml2-doc - update to 2.11.5-14

• https://bugzilla.redhat.com/show_bug.cgi?id=2372952
• https://gitlab.gnome.org/GNOME/libxml2/-/issues/941
• https://gitlab.gnome.org/GNOME/libxml2/-/merge_requests/321/diffs?commit_id=069bcda17d8194e9582c64dd4bc9dac99b015810

• Multiple vulnerabilities in libxml2
• openEuler 24.03 LTS SP1 update for libxml2
• openEuler 24.03 LTS SP2 update for libxml2
• openEuler 24.03 LTS update for libxml2
• openEuler 22.03 LTS SP3 update for libxml2
• openEuler 20.03 LTS SP4 update for libxml2
• openEuler 22.03 LTS SP4 update for libxml2
• Anolis OS update for libxml2
• Anolis OS update for libxml2
• Anolis OS update for libxml2
• Anolis OS update for libxml2
• Meinberg LANTIME firmware update for third-party components
• Multiple vulnerabilities in Tenable Nessus
• Red Hat Enterprise Linux 8 update for libxml2
• Anolis OS update for libxml2