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Fencer Intel
high 7.5

CVE-2026-109090 json

libXi XGetDeviceControl DEVICE_ENABLE Heap Buffer Overflow

published 13d ago modified 5d ago also EUVD-2026-111111

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 17%
public exploits
0
none known

Summary

A malicious X server could cause a heap overflow by injecting a large DEVICE_ENABLE reply when processed by libXi before 1.8.4.

Patch / fix

  • x.org libXi 1.8.4
  • libxi Debian 14 2:1.8.4-1

debian advisories DEBIAN-CVE-2026-109090

  • libXi Linux Micro 6.0 1.8.1-159998.1.1

suse advisories SUSE-SU-2026:24366-1

  • libXi openSUSE Tumbleweed 1.8.3-3.1

opensuse advisories openSUSE-SU-2026:12154-1

  • libXi AlmaLinux 8 1.7.10-4.el8_10
  • libXi AlmaLinux 9 1.7.10-8.el9_8.3
  • libXi AlmaLinux 10 1.8.1-7.el10_2.3

almalinux advisories ALSA-2026:93438ALSA-2026:93439ALSA-2026:93441

  • libXi Rocky Linux 10 1.8.1-7.el10_2.3
  • libXi Rocky Linux 9 1.7.10-8.el9_8.3
  • libXi Rocky Linux 8 1.7.10-4.el8_10

rocky linux advisories RLSA-2026:93441RLSA-2026:93439RLSA-2026:93438

  • libxi Alpine 3.24 1.8.4-r0

alpine advisories ALPINE-CVE-2026-109090

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • libXi Azure Linux 3.0 1.8.4-1

azure linux advisories AZL-111169

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Is CVE-2026-109090 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-109090 updated cvss 7.5

libXi: libXi: Arbitrary code execution via oversized DEVICE_ENABLE reply

  • Red Hat Enterprise Linux 7 libXi
    affected: workaround, no fix available
  • Red Hat Enterprise Linux AppStream (v. 8) libXi 1.7.10-4.el8_10
    fixed: vendor fix RHSA-2026:93438
  • Red Hat Enterprise Linux AppStream (v. 9) libXi 1.7.10-8.el9_8.3
    fixed: vendor fix RHSA-2026:93439
  • Red Hat Enterprise Linux AppStream (v. 10) libXi 1.8.1-7.el10_2.3
    fixed: vendor fix RHSA-2026:93441
  • Red Hat Hardened Images libXi 1.8.4-1.hum1
    fixed: vendor fix RHSA-2026:86772
  • Red Hat Enterprise Linux 6 libXi
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
5d ago

Exploit prediction

0.26% chance of exploitation in the next 30 days, higher than 17% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

  • x.org libXi

Classification

Weakness
  • CWE-122 Heap-based Buffer Overflow

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.