fs_read_glyphs() heap buffer overflow via cumulative glyph data overflow in libXfont2
CVE-2026-44950 is fixed in 5 products on 1 platform, first by SUSE-SU-2026:3500-1, released August 5, 2026. It is not reported as exploited. Patch Radar priority: High.
X.Org X11 libXfont2 runtime library Security Fix(es): * libxfont2: Font Server Client encoding[] Out-Of-Bounds Read/Write (CVE-2026-59679) * libxfonts2: libXfont2: Privilege Escalation via Heap Buffer Overflow in Font Server Client (CVE-2026-44950) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| libXfont2 · RHEL 10 | 2.0.6-5.el10_0.2 | RHSA-2026:62123 | Aug 17, 2026 |
| libXfont2 · RHEL 8 | 0:2.0.3-2.el8_10.3 | RHSA-2026:55446 | Aug 19, 2026 |
| libXfont2 · RHEL 9 | 0:2.0.3-12.el9_8.3 | RHSA-2026:55447 | Aug 19, 2026 |
| libXfont2 · almalinux 10 | 2.0.6-5.el10_2.3 | ALSA-2026:55448 | Aug 17, 2026 |
| libXfont2 · almalinux 8 | 2.0.3-2.el8_10.3 | ALSA-2026:55446 | Aug 17, 2026 |
| libXfont2 · almalinux 9 | 2.0.3-12.el9_8.3 | ALSA-2026:55447 | Aug 17, 2026 |
| libXfont2 · amzn 2023 | 2.0.7-1.amzn2023.0.3 | ALAS2023-2026-2112 | Aug 31, 2026 |
| libXfont2 · ol 10 | 0:2.0.6-5.el10_2.3 | ELSA-2026-55448 | Aug 17, 2026 |
| libXfont2 · ol 8 | 0:2.0.3-2.el8_10.3 | ELSA-2026-55446 | Aug 17, 2026 |
| libXfont2 · ol 9 | 0:2.0.3-12.el9_8.3 | ELSA-2026-55447 | Aug 17, 2026 |
| libXfont2 · opensuse-leap 16.0 | 2.0.7-160000.5.1 | OPENSUSE-SU-2026:21539-1 | Aug 6, 2026 |
| libXfont2 · rocky 10 | 0:2.0.6-5.el10_2.3 | RLSA-2026:55448 | Aug 17, 2026 |
| libXfont2 · rocky 8 | 0:2.0.3-2.el8_10.3 | RLSA-2026:55446 | Aug 17, 2026 |
| libXfont2 · rocky 9 | 0:2.0.3-12.el9_8.3 | RLSA-2026:55447 | Aug 17, 2026 |
| libXfont2 · sles 15.6 | 2.0.3-150000.3.6.1 | SUSE-SU-2026:3500-1 | Aug 5, 2026 |
| libXfont2 · sles 15.7 | 2.0.3-150000.3.6.1 | SUSE-SU-2026:3500-1 | Aug 5, 2026 |
| libXfont2 · sles 16.0 | 2.0.7-160000.5.1 | SUSE-SU-2026:23151-1 | Aug 6, 2026 |
| libXfont2-debuginfo · amzn 2023 | 2.0.7-1.amzn2023.0.3 | ALAS2023-2026-2112 | Aug 31, 2026 |
| libXfont2-debugsource · amzn 2023 | 2.0.7-1.amzn2023.0.3 | ALAS2023-2026-2112 | Aug 31, 2026 |
| libXfont2-devel · RHEL 8 | 0:2.0.3-2.el8_10.3 | RHSA-2026:55446 | Aug 19, 2026 |
| libXfont2-devel · RHEL 9 | 0:2.0.3-12.el9_8.3 | RHSA-2026:55447 | Aug 19, 2026 |
| libXfont2-devel · almalinux 10 | 2.0.6-5.el10_2.3 | ALSA-2026:55448 | Aug 17, 2026 |
| libXfont2-devel · almalinux 8 | 2.0.3-2.el8_10.3 | ALSA-2026:55446 | Aug 17, 2026 |
| libXfont2-devel · almalinux 9 | 2.0.3-12.el9_8.3 | ALSA-2026:55447 | Aug 17, 2026 |
| libXfont2-devel · amzn 2023 | 2.0.7-1.amzn2023.0.3 | ALAS2023-2026-2112 | Aug 31, 2026 |
| libXfont2-devel · ol 10 | 0:2.0.6-5.el10_2.3 | ELSA-2026-55448 | Aug 17, 2026 |
| libXfont2-devel · ol 8 | 0:2.0.3-2.el8_10.3 | ELSA-2026-55446 | Aug 17, 2026 |
| libXfont2-devel · ol 9 | 0:2.0.3-12.el9_8.3 | ELSA-2026-55447 | Aug 17, 2026 |
| libxfont · Debian 14 | 1:2.0.9-1 | DEBIAN-CVE-2026-44950 | Aug 10, 2026 |
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