# X.org libXfont2 vulnerabilities

Source: https://junglewise.ai/threats/technologies/libxfont2  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 9 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/technologies/libxfont2.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 5 vulnerabilities in X.org libXfont2: 0 in the last 7 days and 2 in the last 90 days, 2 of them critical and 0 exploited in the wild. The most recent, CVE-2026-59679, was published on 10 September 2026. Nothing was published in the last eight weeks.

## Counts

- Last 7 days: 0
- Last 30 days: 0
- Last 90 days: 2
- All time: 5 (2 critical, 0 exploited in the wild)

## About X.org libXfont2

The X.Org libXfont2 library provides the core font handling services for the X Window System.

## Latest X.org libXfont2 vulnerabilities

- [CVE-2026-59679: libXfont2 out-of-bounds heap access in fs_read_glyphs()](https://junglewise.ai/threats/cve-2026-59679-libxfont2-out-of-bounds-heap-access-in-fs-read-glyphs) (critical, CVSS 9, published 10 Sep 2026)
- [CVE-2026-44950: X.Org libXfont2 heap buffer overflow in fs_read_glyphs](https://junglewise.ai/threats/cve-2026-44950-x-org-libxfont2-heap-buffer-overflow-in-fs-read-glyphs) (critical, CVSS 9, published 10 Sep 2026)
- [CVE-2026-56003: X.Org libXfont2 heap buffer overflow in ComputeScaledProperties](https://junglewise.ai/threats/cve-2026-56003-x-org-libxfont2-heap-buffer-overflow-in-computescaledproperties) (high, CVSS 8.5, published 8 Jul 2026)
- [CVE-2026-56002: X.Org libXfont2 heap buffer overflow in pcfReadFont](https://junglewise.ai/threats/cve-2026-56002-x-org-libxfont2-heap-buffer-overflow-in-pcfreadfont) (high, CVSS 8.5, published 8 Jul 2026)
- [CVE-2026-56001: X.Org libXfont2 heap buffer overflow in BitmapScaleBitmaps](https://junglewise.ai/threats/cve-2026-56001-x-org-libxfont2-heap-buffer-overflow-in-bitmapscalebitmaps) (high, CVSS 8.5, published 8 Jul 2026)

## Most severe X.org libXfont2 vulnerabilities

- [CVE-2026-44950: X.Org libXfont2 heap buffer overflow in fs_read_glyphs](https://junglewise.ai/threats/cve-2026-44950-x-org-libxfont2-heap-buffer-overflow-in-fs-read-glyphs) (critical, CVSS 9, published 10 Sep 2026)
- [CVE-2026-59679: libXfont2 out-of-bounds heap access in fs_read_glyphs()](https://junglewise.ai/threats/cve-2026-59679-libxfont2-out-of-bounds-heap-access-in-fs-read-glyphs) (critical, CVSS 9, published 10 Sep 2026)
- [CVE-2026-56003: X.Org libXfont2 heap buffer overflow in ComputeScaledProperties](https://junglewise.ai/threats/cve-2026-56003-x-org-libxfont2-heap-buffer-overflow-in-computescaledproperties) (high, CVSS 8.5, published 8 Jul 2026)
- [CVE-2026-56002: X.Org libXfont2 heap buffer overflow in pcfReadFont](https://junglewise.ai/threats/cve-2026-56002-x-org-libxfont2-heap-buffer-overflow-in-pcfreadfont) (high, CVSS 8.5, published 8 Jul 2026)
- [CVE-2026-56001: X.Org libXfont2 heap buffer overflow in BitmapScaleBitmaps](https://junglewise.ai/threats/cve-2026-56001-x-org-libxfont2-heap-buffer-overflow-in-bitmapscalebitmaps) (high, CVSS 8.5, published 8 Jul 2026)

## Vulnerabilities per week

Nothing was published in the last eight weeks.

| Week of | Vulns | Critical | Exploited |
| --- | --- | --- | --- |
| 17 Aug 2026 | 0 | 0 | 0 |
| 24 Aug 2026 | 0 | 0 | 0 |
| 31 Aug 2026 | 0 | 0 | 0 |
| 7 Sep 2026 | 2 | 2 | 0 |
| 14 Sep 2026 | 0 | 0 | 0 |
| 21 Sep 2026 | 0 | 0 | 0 |
| 28 Sep 2026 | 0 | 0 | 0 |
| 5 Oct 2026 | 0 | 0 | 0 |
| 12 Oct 2026 | 0 | 0 | 0 |
| 19 Oct 2026 | 0 | 0 | 0 |
| 26 Oct 2026 | 0 | 0 | 0 |
| 2 Nov 2026 | 0 | 0 | 0 |
| 9 Nov 2026 | 0 | 0 | 0 |

## Other X.org technologies

- [X.org X Server](https://junglewise.ai/threats/technologies/x-org-x-server): 11 vulnerabilities
- [X.org XWayland](https://junglewise.ai/threats/technologies/x-org-xwayland): 10 vulnerabilities
- [X.org libXi](https://junglewise.ai/threats/technologies/libxi): 7 vulnerabilities
- [X.org Xorg-Server](https://junglewise.ai/threats/technologies/xorg-server): 5 vulnerabilities
- [X.org libX11](https://junglewise.ai/threats/technologies/libx11): 3 vulnerabilities

## Sources

NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "X.org libXfont2 vulnerabilities", https://junglewise.ai/threats/technologies/libxfont2, 9 November 2026.