CVE-2026-109089— libXi XGetDeviceControl Control Type Mismatch Heap Buffer Overflow
Quick assessment
Affected
X.Org libXi
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
在 1.8.4 之前的 libXi 库中，处理 DEVICE_RESOLUTION 时存在缓冲区溢出漏洞，该漏洞可被恶意的 X 服务器触发，导致堆内存溢出。
Possible ATT&CK Techniques 1 AI
T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-109089
Vulnerability Information
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Vulnerability Title
libXi XGetDeviceControl Control Type Mismatch Heap Buffer Overflow
Source: CVE Program / CVE List V5
Vulnerability Description
A buffer overflow when handling DEVICE_RESOLUTION in libXi before 1.8.4 could overflow a heap, triggered by a malicious X server.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
堆缓冲区溢出
Source: CVE Program / CVE List V5
Affected Products
II. Public POCs for CVE-2026-109089
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Other References for CVE-2026-109089 (1)
Same Patch Batch · X.Org · 2026-10-27 · 4 CVEs total
| CVE-2026-88812 | 7.8 HIGH | X.Org Server XKB SetGeometry TextDoodad Double Free |
| CVE-2026-109090 | 7.5 HIGH | libXi XGetDeviceControl DEVICE_ENABLE Heap Buffer Overflow |
| CVE-2026-109088 | 6.5 MEDIUM | libXtst RECORD EnableContext Reply Endless Loop |
IV. Related Vulnerabilities
Same product: libXi
-
CVE-2026-109090
libXi XGetDeviceControl DEVICE_ENABLE Heap Buffer Overflow -
CVE-2026-94282
Out-of-bounds read in libXi's XI2 enter/leave/focus cookie c -
CVE-2026-94281
Out-of-bounds read in libXi's XListInputDevices() class pars -
CVE-2026-93545
Out-of-bounds read in libXi's XListInputDevices() -
CVE-2026-93544
Out-of-bounds read in libXi's XI2 XIQueryDevice reply parsin
Same vendor: X.Org
-
CVE-2026-88812
X.Org Server XKB SetGeometry TextDoodad Double Free -
CVE-2026-109090
libXi XGetDeviceControl DEVICE_ENABLE Heap Buffer Overflow -
CVE-2026-109088
libXtst RECORD EnableContext Reply Endless Loop -
CVE-2026-94287
Denial of service via unsigned underflow in libXpm's write p -
CVE-2026-94286
Out-of-bounds read in libXtst's RECORD reply parser
Same weakness: CWE-122
-
CVE-2026-108307
Tanium addressed a heap-based buffer overflow vulnerability -
CVE-2026-57198
Asterisk: Possible RED T.140 Heap Buffer Overflow -
CVE-2026-57197
Asterisk: Heap Buffer Overflow in OGG/Speex File Playback (f -
CVE-2026-109090
libXi XGetDeviceControl DEVICE_ENABLE Heap Buffer Overflow -
CVE-2026-112710
Fireware OS Heap Buffer Overflow in AD Authentication Servic