Medium severity · published Sep 28, 2026
CVE-2026-94284
Out-of-bounds read vulnerability in libX11's XIM trigger-keyregistration parser.registration parser
5.5
CVSS
0.1%
EPSS
No
On KEV
Description
An out-of-bounds read vulnerability in libX11's XIM trigger-key registration 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:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 3% 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-2026-94284
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-94284
patch
https://gitlab.freedesktop.org/xorg/lib/libx11/-/merge_requests/310/diffs?commit_id=1b7904002d212eed40949ccf4e8e7156f9fec0e2
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