CVE-2026-11979

Name
CVE-2026-11979
Description
libxml2 is vulnerable to multiple stack-based buffer overflows in the xmlcatalog utility when running in --shell mode. The usershell() function processes user input using fixed-size stack buffers without proper bounds checking. By supplying an overly long input line, an attacker can overflow internal buffers (command, arg, and argv) during input parsing. This results in memory corruption within the stack frame. Successful exploitation may cause a crash or potentially allow arbitrary code execution in the context of the xmlcatalog process. This issue has been fixed in the commit c2e233fc. NOTE: The maintainers of this project did not agree that this issue is a vulnerability and considered it a bug.
NVD Severity
unknown
Other trackers
CVE, NVD, CERT, CVE Details, CIRCL, Arch Linux, Debian, Red Hat, Ubuntu, Gentoo, SUSE (Bugzilla), SUSE (CVE), Mageia
Mailing lists
oss-security, full-disclosure, bugtraq
Exploits
Exploit DB, Metasploit
Forges
GitHub (code, issues), Aports (code, issues)

References

Type URI
cvd@cert.pl https://cert.pl/en/posts/2026/06/CVE-2026-11979
cvd@cert.pl https://gitlab.gnome.org/GNOME/libxml2/-/commit/c2e233fc1b341685fc99621b2768b503f777a72e

Match rules

CPE URI Source package Min version Max version
cpe:2.3:a:xmlsoft:libxml2:*:*:*:*:*:*:*:* libxml2 >= None <= 2.15.3

Vulnerable and fixed packages

Source package Branch Version Maintainer Status
libxml2 edge-main 2.13.9-r2 Carlo Landmeter <clandmeter@alpinelinux.org> possibly vulnerable
libxml2 edge-main 2.13.9-r1 Carlo Landmeter <clandmeter@alpinelinux.org> possibly vulnerable
libxml2 edge-main 2.13.9-r0 Carlo Landmeter <clandmeter@alpinelinux.org> possibly vulnerable
libxml2 edge-main 2.13.8-r0 Carlo Landmeter <clandmeter@alpinelinux.org> possibly vulnerable
libxml2 edge-main 2.13.7-r1 Carlo Landmeter <clandmeter@alpinelinux.org> possibly vulnerable
libxml2 edge-main 2.13.7-r0 Carlo Landmeter <clandmeter@alpinelinux.org> possibly vulnerable
libxml2 edge-main 2.13.6-r0 Carlo Landmeter <clandmeter@alpinelinux.org> possibly vulnerable
libxml2 edge-main 2.13.4-r3 Carlo Landmeter <clandmeter@alpinelinux.org> possibly vulnerable
libxml2 edge-main 2.13.4-r2 Carlo Landmeter <clandmeter@alpinelinux.org> possibly vulnerable
libxml2 edge-main 2.13.4-r1 Carlo Landmeter <clandmeter@alpinelinux.org> possibly vulnerable
libxml2 edge-main 2.13.4-r0 Carlo Landmeter <clandmeter@alpinelinux.org> possibly vulnerable
libxml2 edge-main 2.12.8-r0 Carlo Landmeter <clandmeter@alpinelinux.org> possibly vulnerable
libxml2 edge-main 2.12.7-r0 Carlo Landmeter <clandmeter@alpinelinux.org> possibly vulnerable
libxml2 edge-main 2.12.6-r2 Carlo Landmeter <clandmeter@alpinelinux.org> possibly vulnerable
libxml2 edge-main 2.12.6-r0 Carlo Landmeter <clandmeter@alpinelinux.org> possibly vulnerable
libxml2 edge-main 2.12.5-r0 Carlo Landmeter <clandmeter@alpinelinux.org> possibly vulnerable
libxml2 edge-main 2.12.4-r0 Carlo Landmeter <clandmeter@alpinelinux.org> possibly vulnerable
libxml2 edge-main 2.12.3-r0 Carlo Landmeter <clandmeter@alpinelinux.org> possibly vulnerable
libxml2 edge-main 2.11.6-r0 Carlo Landmeter <clandmeter@alpinelinux.org> possibly vulnerable
libxml2 edge-main 2.11.5-r0 Carlo Landmeter <clandmeter@alpinelinux.org> possibly vulnerable
libxml2 edge-main 2.11.4-r0 Carlo Landmeter <clandmeter@alpinelinux.org> possibly vulnerable
libxml2 edge-main 2.11.3-r1 Carlo Landmeter <clandmeter@alpinelinux.org> possibly vulnerable
libxml2 edge-main 2.11.3-r0 Carlo Landmeter <clandmeter@alpinelinux.org> possibly vulnerable
libxml2 edge-main 2.11.2-r0 Carlo Landmeter <clandmeter@alpinelinux.org> possibly vulnerable
libxml2 edge-main 2.11.1-r0 Carlo Landmeter <clandmeter@alpinelinux.org> possibly vulnerable
libxml2 edge-main 2.11.0-r3 Carlo Landmeter <clandmeter@alpinelinux.org> possibly vulnerable
libxml2 edge-main 2.11.0-r2 Carlo Landmeter <clandmeter@alpinelinux.org> possibly vulnerable
libxml2 edge-main 2.11.0-r1 Carlo Landmeter <clandmeter@alpinelinux.org> possibly vulnerable
libxml2 edge-main 2.11.0-r0 Carlo Landmeter <clandmeter@alpinelinux.org> possibly vulnerable
libxml2 edge-main 2.10.4-r2 Carlo Landmeter <clandmeter@alpinelinux.org> possibly vulnerable
libxml2 edge-main 2.10.4-r1 Carlo Landmeter <clandmeter@alpinelinux.org> possibly vulnerable
libxml2 edge-main 2.10.4-r0 Carlo Landmeter <clandmeter@alpinelinux.org> possibly vulnerable
libxml2 edge-main 2.10.3-r2 Carlo Landmeter <clandmeter@alpinelinux.org> possibly vulnerable
libxml2 edge-main 2.10.3-r1 Carlo Landmeter <clandmeter@alpinelinux.org> possibly vulnerable
libxml2 edge-main 2.10.3-r0 Carlo Landmeter <clandmeter@alpinelinux.org> possibly vulnerable
libxml2 edge-main 2.10.2-r1 Carlo Landmeter <clandmeter@alpinelinux.org> possibly vulnerable
libxml2 edge-main 2.10.2-r0 Carlo Landmeter <clandmeter@alpinelinux.org> possibly vulnerable
libxml2 edge-main 2.10.1-r0 Carlo Landmeter <clandmeter@alpinelinux.org> possibly vulnerable
libxml2 edge-main 2.10.0-r0 Carlo Landmeter <clandmeter@alpinelinux.org> possibly vulnerable
libxml2 edge-main 2.9.14-r1 Carlo Landmeter <clandmeter@alpinelinux.org> possibly vulnerable
libxml2 edge-main 2.9.14-r0 Carlo Landmeter <clandmeter@alpinelinux.org> possibly vulnerable
libxml2 edge-main 2.9.13-r0 Carlo Landmeter <clandmeter@alpinelinux.org> possibly vulnerable
libxml2 edge-main 2.9.11-r0 None possibly vulnerable
libxml2 edge-main 2.9.10-r7 Carlo Landmeter <clandmeter@alpinelinux.org> possibly vulnerable
libxml2 edge-main 2.9.10-r5 None possibly vulnerable
libxml2 edge-main 2.9.10-r4 None possibly vulnerable
libxml2 edge-main 2.9.8-r3 None possibly vulnerable
libxml2 edge-main 2.9.8-r1 None possibly vulnerable
libxml2 edge-main 2.9.4-r4 None possibly vulnerable
libxml2 edge-main 2.9.4-r2 None possibly vulnerable
libxml2 edge-main 2.9.4-r1 None possibly vulnerable
libxml2 3.24-main 2.13.9-r2 Carlo Landmeter <clandmeter@alpinelinux.org> possibly vulnerable
libxml2 3.23-main 2.13.9-r1 Carlo Landmeter <clandmeter@alpinelinux.org> possibly vulnerable
libxml2 3.23-main 2.13.9-r0 Carlo Landmeter <clandmeter@alpinelinux.org> possibly vulnerable
libxml2 3.22-main 2.13.9-r1 Carlo Landmeter <clandmeter@alpinelinux.org> possibly vulnerable
libxml2 3.22-main 2.13.9-r0 Carlo Landmeter <clandmeter@alpinelinux.org> possibly vulnerable
libxml2 3.22-main 2.13.8-r0 Carlo Landmeter <clandmeter@alpinelinux.org> possibly vulnerable
libxml2 3.22-main 2.13.6-r0 None possibly vulnerable
libxml2 3.22-main 2.12.7-r0 None possibly vulnerable
libxml2 3.22-main 2.12.5-r0 None possibly vulnerable
libxml2 3.22-main 2.10.4-r0 None possibly vulnerable
libxml2 3.22-main 2.10.3-r0 None possibly vulnerable
libxml2 3.22-main 2.10.0-r0 None possibly vulnerable
libxml2 3.22-main 2.9.14-r0 None possibly vulnerable
libxml2 3.22-main 2.9.13-r0 None possibly vulnerable
libxml2 3.22-main 2.9.11-r0 None possibly vulnerable
libxml2 3.22-main 2.9.10-r5 None possibly vulnerable
libxml2 3.22-main 2.9.10-r4 None possibly vulnerable
libxml2 3.22-main 2.9.8-r3 None possibly vulnerable
libxml2 3.22-main 2.9.8-r1 None possibly vulnerable
libxml2 3.22-main 2.9.4-r4 None possibly vulnerable
libxml2 3.22-main 2.9.4-r2 None possibly vulnerable
libxml2 3.22-main 2.9.4-r1 None possibly vulnerable
libxml2 3.21-main 2.13.9-r1 Carlo Landmeter <clandmeter@alpinelinux.org> possibly vulnerable
libxml2 3.21-main 2.13.9-r0 Carlo Landmeter <clandmeter@alpinelinux.org> possibly vulnerable
libxml2 3.21-main 2.13.4-r6 Carlo Landmeter <clandmeter@alpinelinux.org> possibly vulnerable
libxml2 3.21-main 2.13.4-r5 Carlo Landmeter <clandmeter@alpinelinux.org> possibly vulnerable
libxml2 3.21-main 2.13.4-r4 Carlo Landmeter <clandmeter@alpinelinux.org> possibly vulnerable
libxml2 3.21-main 2.13.4-r3 Carlo Landmeter <clandmeter@alpinelinux.org> possibly vulnerable
libxml2 3.21-main 2.12.7-r0 None possibly vulnerable
libxml2 3.21-main 2.12.5-r0 None possibly vulnerable
libxml2 3.21-main 2.10.4-r0 None possibly vulnerable
libxml2 3.21-main 2.10.3-r0 None possibly vulnerable
libxml2 3.21-main 2.10.0-r0 None possibly vulnerable
libxml2 3.21-main 2.9.14-r0 None possibly vulnerable
libxml2 3.21-main 2.9.13-r0 None possibly vulnerable
libxml2 3.21-main 2.9.11-r0 None possibly vulnerable
libxml2 3.21-main 2.9.10-r5 None possibly vulnerable
libxml2 3.21-main 2.9.10-r4 None possibly vulnerable
libxml2 3.21-main 2.9.8-r3 None possibly vulnerable
libxml2 3.21-main 2.9.8-r1 None possibly vulnerable
libxml2 3.21-main 2.9.4-r4 None possibly vulnerable
libxml2 3.21-main 2.9.4-r2 None possibly vulnerable
libxml2 3.21-main 2.9.4-r1 None possibly vulnerable
libxml2 3.20-main 2.12.10-r0 Carlo Landmeter <clandmeter@alpinelinux.org> possibly vulnerable
libxml2 3.20-main 2.12.7-r3 None possibly vulnerable
libxml2 3.20-main 2.12.7-r2 Carlo Landmeter <clandmeter@alpinelinux.org> possibly vulnerable
libxml2 3.20-main 2.12.7-r1 Carlo Landmeter <clandmeter@alpinelinux.org> possibly vulnerable
libxml2 3.20-main 2.12.7-r0 Carlo Landmeter <clandmeter@alpinelinux.org> possibly vulnerable
libxml2 3.20-main 2.12.5-r0 None possibly vulnerable
libxml2 3.20-main 2.10.4-r0 None possibly vulnerable
libxml2 3.20-main 2.10.3-r0 None possibly vulnerable
libxml2 3.20-main 2.10.0-r0 None possibly vulnerable
libxml2 3.20-main 2.9.14-r0 None possibly vulnerable
libxml2 3.20-main 2.9.13-r0 None possibly vulnerable
libxml2 3.20-main 2.9.11-r0 None possibly vulnerable
libxml2 3.20-main 2.9.10-r5 None possibly vulnerable
libxml2 3.20-main 2.9.10-r4 None possibly vulnerable
libxml2 3.20-main 2.9.8-r3 None possibly vulnerable
libxml2 3.20-main 2.9.8-r1 None possibly vulnerable
libxml2 3.20-main 2.9.4-r4 None possibly vulnerable
libxml2 3.20-main 2.9.4-r2 None possibly vulnerable
libxml2 3.20-main 2.9.4-r1 None possibly vulnerable
libxml2 3.19-main 2.11.8-r3 Carlo Landmeter <clandmeter@alpinelinux.org> possibly vulnerable
libxml2 3.19-main 2.11.8-r2 Carlo Landmeter <clandmeter@alpinelinux.org> possibly vulnerable
libxml2 3.19-main 2.11.8-r1 Carlo Landmeter <clandmeter@alpinelinux.org> possibly vulnerable
libxml2 3.19-main 2.11.8-r0 Carlo Landmeter <clandmeter@alpinelinux.org> possibly vulnerable
libxml2 3.19-main 2.11.7-r0 Carlo Landmeter <clandmeter@alpinelinux.org> possibly vulnerable
libxml2 3.19-main 2.11.6-r0 Carlo Landmeter <clandmeter@alpinelinux.org> possibly vulnerable
libxml2 3.19-main 2.10.4-r0 None possibly vulnerable
libxml2 3.19-main 2.10.3-r0 None possibly vulnerable
libxml2 3.19-main 2.10.0-r0 None possibly vulnerable
libxml2 3.19-main 2.9.14-r0 None possibly vulnerable
libxml2 3.19-main 2.9.13-r0 None possibly vulnerable
libxml2 3.19-main 2.9.11-r0 None possibly vulnerable
libxml2 3.19-main 2.9.10-r5 None possibly vulnerable
libxml2 3.19-main 2.9.10-r4 None possibly vulnerable
libxml2 3.19-main 2.9.8-r3 None possibly vulnerable
libxml2 3.19-main 2.9.8-r1 None possibly vulnerable
libxml2 3.19-main 2.9.4-r4 None possibly vulnerable
libxml2 3.19-main 2.9.4-r2 None possibly vulnerable
libxml2 3.19-main 2.9.4-r1 None possibly vulnerable