CVE-2026-93542

EUVD-2026-86210
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
suseCNA
6.5 MEDIUM
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 18.11%
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources (CNA/ADP records, vendor advisories, Enginsight analysis).
VendorProductVersionSource
x.orglibxi
𝑥
< 1.8.4
CNA
Debian logo
Debian Releases
Debian Product
Codename
libxi
bookworm
postponed
forky
2:1.8.4-1
fixed
sid
2:1.8.4-1
fixed
trixie
no-dsa
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
libxi
bionic
needs-triage
focal
needs-triage
jammy
needs-triage
noble
needs-triage
resolute
needs-triage
stonking
needs-triage
xenial
needs-triage
Azure Linux logo
Azure Linux Releases
Azure Package
Release
libXi
Azure Linux 3.0
0:1.8.4-1.azl3
fixed
Common Weakness Enumeration
References
https://gitlab.freedesktop.org/xorg/lib/libxi/-/merge_requests/23/diffs?commit_id=f499944ad595b9bd7e7571c810842244caf150aa