Vulnerability · Published Jul 8, 2026 · Assigned by suse
CVE-2026-56002libXfont2 PCF Font Parsing Heap Buffer Overflow
High 8.5
In plain English
A high-severity heap buffer overflow in libXfont2 from X.Org. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 37% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)8.5High
Exploit odds (30 days)0.4%top 62.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
A heap bufferflow in pcfReadFont() due to missing glyph bounds checking in libXfont2 before 2.0.8 allows attackers authenticated as X client to execute code within the X server.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:10 | libXfont2 | 2.0.6-5.el10_2.1 | ALSA-2026:47079 |
| AlmaLinux:8 | libXfont2 | 2.0.3-2.el8_10.1 | ALSA-2026:47103 |
| AlmaLinux:9 | libXfont2 | 2.0.3-12.el9_8.1 | ALSA-2026:47084 |
| AlmaLinux:10 | libXfont2-devel | 2.0.6-5.el10_2.1 | ALSA-2026:47079 |
| AlmaLinux:8 | libXfont2-devel | 2.0.3-2.el8_10.1 | ALSA-2026:47103 |
| AlmaLinux:9 | libXfont2-devel | 2.0.3-12.el9_8.1 | ALSA-2026:47084 |
| Alpine:v3.24 | libxfont2 | 2.0.8-r0 | ALPINE-CVE-2026-56002 |
| Debian:12 | libxfont | 1:2.0.6-1+deb12u1 | DEBIAN-CVE-2026-56002 |
| Debian:13 | libxfont | 1:2.0.6-1+deb13u1 | DEBIAN-CVE-2026-56002 |
| Debian:14 | libxfont | 1:2.0.8-1 | DEBIAN-CVE-2026-56002 |
| Rocky Linux:10 | libXfont2 | 0:2.0.6-5.el10_2.1 | RLSA-2026:47079 |
| Rocky Linux:8 | libXfont2 | 0:2.0.3-2.el8_10.1 | RLSA-2026:47103 |
| Rocky Linux:9 | libXfont2 | 0:2.0.3-12.el9_8.1 | RLSA-2026:47084 |
| Ubuntu:22.04:LTS | libxfont | 1:2.0.5-1ubuntu0.2 | UBUNTU-CVE-2026-56002 |
| Ubuntu:22.04:LTS | libxfont | 1:2.0.5-1ubuntu0.2 | USN-8560-1 |
| Ubuntu:24.04:LTS | libxfont | 1:2.0.6-1+deb13u1build0.24.04.2 | UBUNTU-CVE-2026-56002 |
| Ubuntu:24.04:LTS | libxfont | 1:2.0.6-1+deb13u1build0.24.04.2 | USN-8560-1 |
| Ubuntu:25.10 | libxfont | no fix listed | UBUNTU-CVE-2026-56002 |
| Ubuntu:26.04:LTS | libxfont | 1:2.0.6-2ubuntu0.2 | USN-8560-1 |
| Ubuntu:26.04:LTS | libxfont | 1:2.0.6-2ubuntu0.2 | UBUNTU-CVE-2026-56002 |
Affected products (as reported)
Weakness: CWE-122 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H