CVE-2026-93542

MEDIUM 6.5

Out-of-bounds read in libXi's XI2 class parsing via size_classes() and copy_classes()

CVSS Score

6.5

EPSS Score

0.0%

EPSS Percentile

0th

An out-of-bounds read in libXi's XI2 class parsing via size_classes() and copy_classes() in libXi before 1.8.4 could be used by malicous servers to crash the X client.

CWE	CWE-125
Vendor	x.org
Product	libxi
Published	Sep 24, 2026
Last Updated	Sep 24, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Affected Versions

x.org / libXi

0 < 1.8.4

References

NVD ↗ CVE.org ↗ EPSS Data ↗

gitlab.freedesktop.org: https://gitlab.freedesktop.org/xorg/lib/libxi/-/merge_requests/23/diffs?commit_id=f499944ad595b9bd7e7571c810842244caf150aa

Credits

AISLE in partnership with Red Hat