CVE-2026-93543 libXi - Denial of Service

libXi < 1.8.4 contains an out-of-bounds read caused by improper bounds checking in the XI2 class parser, letting malicious X servers crash attached X clients, exploit requires malicious X server.

CVSS base score 7.4 /10
High
CISA KEV
Not listed
Public exploit
None known
EPSS
0.25% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Denial of Service
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:N/A:H
Published
24 September 2026
Updated
15 October 2026
Weakness
CWE-125

Vendor fix

Update to version 1.8.4 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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