CVE-2026-94282: Out-of-bounds read in libXi's XI2 enter/leave/focus cookie conversion

Severity: medium (CVSS 5.6 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-09-28 · updated 2026-09-30
Weakness: CWE-125

Description

An out-of-bounds read in libXi's XI2 enter/leave/focus cookie conversion in libXi before 1.8.4 could be used by malicious X server to crash an attached X client.

Affected products

x.org libXi: before 1.8.4 — fixed in 1.8.4

How to fix

Upgrade to a fixed version: x.org libXi 1.8.4. Check the vendor advisory for mitigations.

References

https://gitlab.freedesktop.org/xorg/lib/libxi/-/merge_requests/23/diffs?commit_id=cecf160e9731fe01f3632f875f29ffcb598b052a

Get alerted when CVE-2026-94282 or the next vulnerability affects your stack