CVE-2026-94283

MEDIUM 6.5

Out-of-bounds read vulnerability in libX11's XIM (X Input Method) attribute parser

CVSS Score

6.5

EPSS Score

0.0%

EPSS Percentile

0th

An out-of-bounds read vulnerability in libX11's XIM (X Input Method) attribute parser in libX11 before 1.8.14 could be used by malicious X servers to crash attached X clients.

CWE	CWE-125
Vendor	x.org
Product	libx11
Published	Sep 28, 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 / libX11

0 < 1.8.14

References

NVD ↗ CVE.org ↗ EPSS Data ↗

gitlab.freedesktop.org: https://gitlab.freedesktop.org/xorg/lib/libx11/-/merge_requests/310/diffs?commit_id=42d0303f243002a9856c76060569a61893c670dd

Credits

AISLE in partnership with Red Hat