CVE-2026-93544 Out-of-bounds read in libXi's XI2 XIQueryDevice reply parsing
A malicious X server can crash an attached X client via an out-of-bounds read in libXi's XIQueryDevice reply parsing.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-93544?
CVE-2026-93544 is a medium-severity memory corruption vulnerability in x.org libXi, published on 24 Sep 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
An out-of-bounds read in libXi's XI2 XIQueryDevice reply parsing in libXi before 1.8.4 can be used by a malicious X server to crash an attached X client.
Weakness: CWE-125
Which versions are affected by CVE-2026-93544?
How do I fix CVE-2026-93544?
Upgrade to a fixed version.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-93544 being exploited?
There is no known exploitation of CVE-2026-93544 in the wild and no public exploit code.
Sources
Also known as ALPINE-CVE-2026-93544, AZL-104069, BELL-CVE-2026-93544, DEBIAN-CVE-2026-93544, ECHO-6d10-7224-0936, GHSA-g868-9hpm-37h7 and 1 more.