Out-of-Bounds Read Vulnerability in libXi Affecting X Client
CVE-2026-93543

7.4HIGH

Key Information:

Vendor

X.org

Status
Libxi
Vendor
CVE Published:
24 September 2026

What is CVE-2026-93543?

An out-of-bounds read vulnerability in the XI2 class parser of libXi allows malicious X servers to exploit this weakness, potentially crashing an attached X client. Unpatched versions prior to 1.8.4 are particularly vulnerable, making it essential for users and administrators to update to the latest version to mitigate this risk.

Affected Version(s)

libXi 0 < 1.8.4

References

https://gitlab.freedesktop.org/xorg/lib/libxi/-/merge_req...
patch

CVSS V3.1

Score:
7.4
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

AISLE in partnership with Red Hat
.