CVE-2026-94286— Out-of-bounds read in libXtst's RECORD reply parser
Quick assessment
Affected
x.org libXtst
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.
libXtst 1.2.6 版本之前，libXtst 中的 RECORD 回复解析器存在一个越界读取漏洞，恶意 X 服务器可以利用该漏洞导致附加的 X 客户端崩溃。
Possible ATT&CK Techniques 1 AI
T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-94286
Vulnerability Information
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Vulnerability Title
Out-of-bounds read in libXtst's RECORD reply parser
Source: CVE Program / CVE List V5
Vulnerability Description
An out-of-bounds read in libXtst's RECORD reply parser in libXtst before 1.2.6 could be used by malicious X servers to crash attached X clients.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
缓冲区上溢读取
Source: CVE Program / CVE List V5
Affected Products
II. Public POCs for CVE-2026-94286
| # | POC Description | Source Link | Shenlong Link |
|---|
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Other References for CVE-2026-94286 (1)
Same Patch Batch · x.org · 2026-09-28 · 6 CVEs total
| CVE-2026-94283 | 6.5 MEDIUM | Out-of-bounds read vulnerability in libX11's XIM (X Input Method) attribute parser |
| CVE-2026-94282 | 5.6 MEDIUM | Out-of-bounds read in libXi's XI2 enter/leave/focus cookie conversion |
| CVE-2026-94284 | 5.5 MEDIUM | Out-of-bounds read vulnerability in libX11's XIM trigger-keyregistration parser.registrati |
| CVE-2026-94287 | 5.5 MEDIUM | Denial of service via unsigned underflow in libXpm's write path |
| CVE-2026-94285 | 5.1 MEDIUM | Out-of-bounds read in libX11's byte-oriented codeset parser |
IV. Related Vulnerabilities
Same vendor: x.org
-
CVE-2026-94287
Denial of service via unsigned underflow in libXpm's write p -
CVE-2026-94285
Out-of-bounds read in libX11's byte-oriented codeset parser -
CVE-2026-94284
Out-of-bounds read vulnerability in libX11's XIM trigger-key -
CVE-2026-94283
Out-of-bounds read vulnerability in libX11's XIM (X Input Me -
CVE-2026-94282
Out-of-bounds read in libXi's XI2 enter/leave/focus cookie c
V. Comments for CVE-2026-94286
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