Vulnerability · Published Sep 28, 2026 · Assigned by suse
CVE-2026-94286Out-of-bounds read in libXtst's RECORD reply parser
High 7.1
In plain English
A high-severity security flaw in libXtst 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 0.2% (higher than 10% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)7.1High
Exploit odds (30 days)0.2%top 89.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
An out-of-bounds read in libXtst's RECORD reply parser in libXtst before 1.2.6 could be used by malicious X servers to crash attached X clients.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:10 | libXtst | 1.2.4-8.el10_2.1 | ALSA-2026:91612 |
| AlmaLinux:8 | libXtst | 1.2.3-8.el8_10 | ALSA-2026:91294 |
| AlmaLinux:9 | libXtst | 1.2.3-16.el9_8.1 | ALSA-2026:91223 |
| AlmaLinux:10 | libXtst-devel | 1.2.4-8.el10_2.1 | ALSA-2026:91612 |
| AlmaLinux:8 | libXtst-devel | 1.2.3-8.el8_10 | ALSA-2026:91294 |
| AlmaLinux:9 | libXtst-devel | 1.2.3-16.el9_8.1 | ALSA-2026:91223 |
| Alpine:v3.24 | libxtst | 1.2.6-r0 | ALPINE-CVE-2026-94286 |
| Debian:12 | libxtst | no fix listed | DEBIAN-CVE-2026-94286 |
| Debian:13 | libxtst | no fix listed | DEBIAN-CVE-2026-94286 |
| Debian:14 | libxtst | 2:1.2.6-1 | DEBIAN-CVE-2026-94286 |
| Rocky Linux:10 | libXtst | 0:1.2.4-8.el10_2.1 | RLSA-2026:91612 |
| Rocky Linux:8 | libXtst | 0:1.2.3-8.el8_10 | RLSA-2026:91294 |
| Rocky Linux:9 | libXtst | 0:1.2.3-16.el9_8.1 | RLSA-2026:91223 |
| Ubuntu:22.04:LTS | libxtst | 2:1.2.3-1ubuntu0.22.04.1 | UBUNTU-CVE-2026-94286 |
| Ubuntu:22.04:LTS | libxtst | 2:1.2.3-1ubuntu0.22.04.1 | USN-8939-1 |
| Ubuntu:24.04:LTS | libxtst | 2:1.2.3-1.1ubuntu0.1 | UBUNTU-CVE-2026-94286 |
| Ubuntu:24.04:LTS | libxtst | 2:1.2.3-1.1ubuntu0.1 | USN-8939-1 |
| Ubuntu:26.04:LTS | libxtst | 2:1.2.5-1ubuntu0.1 | USN-8939-1 |
| Ubuntu:26.04:LTS | libxtst | 2:1.2.5-1ubuntu0.1 | UBUNTU-CVE-2026-94286 |
| Ubuntu:26.10 | libxtst | 2:1.2.5-1ubuntu1 | USN-8939-1 |
| Ubuntu:26.10 | libxtst | 2:1.2.5-1ubuntu1 | UBUNTU-CVE-2026-94286 |
Affected products (as reported)
Weakness: CWE-126 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H