CVE-2026-94285

MEDIUM 5.1

Out-of-bounds read in libX11's byte-oriented codeset parser

CVSS Score

5.1

EPSS Score

0.0%

EPSS Percentile

0th

An out-of-bounds read in libX11's byte-oriented codeset 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:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

Low

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=980868483446f24f9658d26aa5bfa42f3da6dd3a

Credits

AISLE in partnership with Red Hat