Vulnerability · Published Sep 28, 2026 · Assigned by suse
CVE-2026-94285Out-of-bounds read in libX11's byte-oriented codeset parser
Medium 5.1
In plain English
A medium-severity out-of-bounds read in libX11 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 0.1% (higher than 4% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)5.1Medium
Exploit odds (30 days)0.1%top 96.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
An out-of-bounds read in libX11's byte-oriented codeset parser in libX11 before 1.8.14 could be used by malicious X servers to crash attached X clients.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.24 | libx11 | 1.8.14-r0 | ALPINE-CVE-2026-94285 |
| Debian:12 | libx11 | no fix listed | DEBIAN-CVE-2026-94285 |
| Debian:13 | libx11 | no fix listed | DEBIAN-CVE-2026-94285 |
| Debian:14 | libx11 | 2:1.8.14-1 | DEBIAN-CVE-2026-94285 |
| Ubuntu:22.04:LTS | libx11 | 2:1.7.5-1ubuntu0.4 | UBUNTU-CVE-2026-94285 |
| Ubuntu:22.04:LTS | libx11 | 2:1.7.5-1ubuntu0.4 | USN-8913-1 |
| Ubuntu:24.04:LTS | libx11 | 2:1.8.7-1ubuntu0.1 | USN-8913-1 |
| Ubuntu:24.04:LTS | libx11 | 2:1.8.7-1ubuntu0.1 | UBUNTU-CVE-2026-94285 |
| Ubuntu:26.04:LTS | libx11 | 2:1.8.13-1ubuntu0.1 | USN-8913-1 |
| Ubuntu:26.04:LTS | libx11 | 2:1.8.13-1ubuntu0.1 | UBUNTU-CVE-2026-94285 |
| Ubuntu:26.10 | libx11 | no fix listed | UBUNTU-CVE-2026-94285 |
Affected products (as reported)
Weakness: CWE-125 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L