Vulnerability · Published Jul 8, 2026 · Assigned by suse
CVE-2026-56001libXfont2 BitmapScaleBitmaps Integer Overflow 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 34% 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 66.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
A heap buffer overflow in BitmapScaleBitmaps in libXfont2 before 2.0.8 due to an overflowing 32bit size could be used by attackers able to access the X Server to execute code within the X server cont
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-2026-56001 |
| Debian:12 | libxfont | 1:2.0.6-1+deb12u1 | DEBIAN-CVE-2026-56001 |
| Debian:13 | libxfont | 1:2.0.6-1+deb13u1 | DEBIAN-CVE-2026-56001 |
| Debian:14 | libxfont | 1:2.0.8-1 | DEBIAN-CVE-2026-56001 |
| 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-2026-56001 |
| 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-2026-56001 |
| 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-2026-56001 |
| 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-2026-56001 |
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