All vulnerabilities
CVE-2026-109089

libXi XGetDeviceControl Control Type Mismatch Heap Buffer Overflow

X.Org libXi
Open in ThreatlineRecord JSON
CVSS
7.5High
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)No scoreNo FIRST EPSS score in this snapshot yet
Fixed in1.8.4Fixed versionCVE List
Published27 Oct 2026Updated 27 Oct 2026CVE List

What fixes it

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Description

A buffer overflow when handling DEVICE_RESOLUTION in libXi before 1.8.4 could overflow a heap, triggered by a malicious X server.

Text from CVE List

Affected versions 1

  • libXiaffected: all versions before 1.8.4CVE List

References 1