[xml/sgml-pkgs] Bug#1098321: libxml2: CVE-2025-24928: Stack-buffer-overflow in xmlSnprintfElements

[Salvatore Bonaccorso]

Source: libxml2
Version: 2.12.7+dfsg+really2.9.14-0.2
Severity: important
Tags: security upstream
Forwarded: https://gitlab.gnome.org/GNOME/libxml2/-/issues/847
X-Debbugs-Cc: carnil at debian.org, Debian Security Team <team at security.debian.org>
Control: found -1 2.9.14+dfsg-1.3

Hi,

The following vulnerability was published for libxml2.

CVE-2025-24928[0]:
| libxml2 before 2.12.10 and 2.13.x before 2.13.6 has a stack-based
| buffer overflow in xmlSnprintfElements in valid.c. To exploit this,
| DTD validation must occur for an untrusted document or untrusted
| DTD. NOTE: this is similar to CVE-2017-9047.


If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2025-24928
    https://www.cve.org/CVERecord?id=CVE-2025-24928
[1] https://gitlab.gnome.org/GNOME/libxml2/-/issues/847
[2] https://gitlab.gnome.org/GNOME/libxml2/-/commit/8c8753ad5280ee13aee5eec9b0f6eee2ed920f57
[3] https://gitlab.gnome.org/GNOME/libxml2/-/commit/858ca26c0689161a6b903a6682cc8a1cc10a0ea8

Regards,
Salvatore