Medium severity · published Sep 28, 2026
CVE-2026-94283
Out-of-bounds read vulnerability in libX11's XIM (X Input Method) attribute parser
6.5
CVSS
0.2%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 11% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LI
libX11 · x.org
before 1.8.14 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-94283
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-94283
patch
https://gitlab.freedesktop.org/xorg/lib/libx11/-/merge_requests/310/diffs?commit_id=42d0303f243002a9856c76060569a61893c670dd
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