| Name | CVE-2026-76781 |
| Description | A flaw was found in libxml2. A local user or an attacker providing a specially crafted XML catalog can trigger a NULL pointer dereference during XML catalog parsing. This occurs when a `nextCatalog` element lacks its mandatory `catalog` attribute, leading to the application crashing and causing a Denial of Service (DoS). |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| libxml2 (PTS) | bookworm | 2.9.14+dfsg-1.3~deb12u6 | vulnerable |
| bookworm (security) | 2.9.14+dfsg-1.3~deb12u4 | vulnerable | |
| trixie | 2.12.7+dfsg+really2.9.14-2.1+deb13u3 | vulnerable | |
| trixie (security) | 2.12.7+dfsg+really2.9.14-2.1+deb13u1 | vulnerable | |
| forky, sid | 2.15.4+dfsg-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| libxml2 | source | (unstable) | 2.15.4+dfsg-1 |
[bookworm] - libxml2 <postponed> (Minor issue; introduced by CVE-2026-0992 backport)
https://gitlab.gnome.org/GNOME/libxml2/-/merge_requests/442
Fixed by: https://gitlab.gnome.org/GNOME/libxml2/-/commit/c63248941708bc1d2e3a4292954593312212f6ca (master)
Fixed by: https://gitlab.gnome.org/GNOME/libxml2/-/commit/a34c084d7a576914c1424caabdaaf5e227bb39ef (v2.15.4)