| Name | CVE-2026-44950 |
| Description | Font Server Client Cumulative Glyph Data Heap Buffer Overflow |
| 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) |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| libxfont (PTS) | bullseye | 1:2.0.4-1 | vulnerable |
| bullseye (security) | 1:2.0.4-1+deb11u1 | vulnerable |
| bookworm, trixie | 1:2.0.6-1 | vulnerable |
| bookworm (security) | 1:2.0.6-1+deb12u1 | vulnerable |
| trixie (security) | 1:2.0.6-1+deb13u1 | vulnerable |
| forky | 1:2.0.8-1 | vulnerable |
| sid | 1:2.0.9-1 | vulnerable |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| libxfont | source | (unstable) | (unfixed) | unimportant | | |
Notes
https://www.openwall.com/lists/oss-security/2026/08/05/1
Fixed by: https://gitlab.freedesktop.org/xorg/lib/libxfont/-/commit/c2d222bb22c623d8a40f3275077fc7e6617f2c8a (libXfont2-2.0.9)
Disabled support to connect to font server since 1:1.4.7-1