Vulnerability · Published Sep 24, 2026 · Assigned by suse
CVE-2026-93543Out-of-bounds read in libXi's XI2 class parser
High 7.4
In plain English
A high-severity out-of-bounds read in libXi 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 0.3% (higher than 18% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)7.4High
Exploit odds (30 days)0.3%top 81.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
An out-of-bounds read in libXi's XI2 class parser in libXi before 1.8.4 could be used by malicious X servers to crash an attached X client.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:10 | libXi | 1.8.1-7.el10_2.1 | ALSA-2026:91004 |
| AlmaLinux:8 | libXi | 1.7.10-2.el8_10 | ALSA-2026:91268 |
| AlmaLinux:9 | libXi | 1.7.10-8.el9_8.1 | ALSA-2026:91056 |
| AlmaLinux:10 | libXi-devel | 1.8.1-7.el10_2.1 | ALSA-2026:91004 |
| AlmaLinux:8 | libXi-devel | 1.7.10-2.el8_10 | ALSA-2026:91268 |
| AlmaLinux:9 | libXi-devel | 1.7.10-8.el9_8.1 | ALSA-2026:91056 |
| Alpine:v3.24 | libxi | 1.8.4-r0 | ALPINE-CVE-2026-93543 |
| Debian:12 | libxi | no fix listed | DEBIAN-CVE-2026-93543 |
| Debian:13 | libxi | no fix listed | DEBIAN-CVE-2026-93543 |
| Debian:14 | libxi | 2:1.8.4-1 | DEBIAN-CVE-2026-93543 |
| Rocky Linux:10 | libXi | 0:1.8.1-7.el10_2.1 | RLSA-2026:91004 |
| Rocky Linux:8 | libXi | 0:1.7.10-2.el8_10 | RLSA-2026:91268 |
| Rocky Linux:9 | libXi | 0:1.7.10-8.el9_8.1 | RLSA-2026:91056 |
| Ubuntu:22.04:LTS | libxi | no fix listed | UBUNTU-CVE-2026-93543 |
| Ubuntu:24.04:LTS | libxi | no fix listed | UBUNTU-CVE-2026-93543 |
| Ubuntu:26.04:LTS | libxi | no fix listed | UBUNTU-CVE-2026-93543 |
| Ubuntu:26.10 | libxi | no fix listed | UBUNTU-CVE-2026-93543 |
Affected products (as reported)
Weakness: CWE-125 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:N/A:H