High severity · published Oct 27, 2026
CVE-2026-109089
libXi XGetDeviceControl Control Type Mismatch Heap Buffer Overflow
New
7.5
CVSS
0.3%
EPSS
No
On KEV
Description
A buffer overflow when handling DEVICE_RESOLUTION in libXi before 1.8.4 could overflow a heap, triggered by a malicious X server.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
High
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 17% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LI
libXi · X.Org
before 1.8.4 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-109089
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-109089
gitlab.freedesktop.org
https://gitlab.freedesktop.org/xorg/lib/libxi/-/commit/f7836d0a0
More from libXi
7.5
CVE-2026-109090
libXi XGetDeviceControl DEVICE_ENABLE Heap Buffer Overflow
7.5
CVE-2016-7946
X.org libXi before 1.7.7 allows remote X servers to cause a denial of service (infinite loop) via vectors involving length fields
7.5
CVE-2016-7945
Multiple integer overflows in X.org libXi before 1.7.7 allow remote X servers to cause a denial of service (out-of-bounds memory access or infinite loop) via vectors involving…
7.4
CVE-2026-93543
Out-of-bounds read in libXi's XI2 class parser
6.5
CVE-2026-94281
Out-of-bounds read in libXi's XListInputDevices() class parsing