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CVE-2026-62840— Linux Kernel Elevation of Privilege Vulnerability

Quick assessment

Affected
Microsoft Linux 3P (Third Party) Distros
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.

Linux内核中的时间检查到时间使用（TOCTOU）竞争条件漏洞，允许授权攻击者通过本地提权。

CVSS 7.0 · High

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation
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I. Basic Information for CVE-2026-62840

Vulnerability Information
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Vulnerability Title
Linux Kernel Elevation of Privilege Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Time-of-check time-of-use (toctou) race condition in Linux Kernel allows an authorized attacker to elevate privileges locally.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
检查时间与使用时间(TOCTOU)的竞争条件
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Microsoft Linux 3P (Third Party) Distros 1.0.0 ~ 7.3 -
Microsoft Linux kernel - Microsoft MANA Network Driver - -

II. Public POCs for CVE-2026-62840

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III. Intelligence Information for CVE-2026-62840

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Vendor Advisories for CVE-2026-62840 (1)

Same Patch Batch · Microsoft · 2026-10-13 · 1407 CVEs total

CVE-2026-69705 9.8 CRITICAL Windows iSCSI Remote Code Execution Vulnerability
CVE-2026-70242 9.8 CRITICAL Microsoft Office Outlook Remote Code Execution Vulnerability
CVE-2026-88178 9.8 CRITICAL Microsoft Office PowerPoint Remote Code Execution Vulnerability
CVE-2026-88156 9.8 CRITICAL Microsoft Office Outlook Remote Code Execution Vulnerability
CVE-2026-85928 9.8 CRITICAL Windows Volume Manager Extension Driver Remote Code Execution Vulnerability
CVE-2026-100222 9.8 CRITICAL Network Policy Server (NPS) Remote Code Execution Vulnerability
CVE-2026-96096 9.8 CRITICAL Windows Media Player Remote Code Execution Vulnerability
CVE-2026-70291 9.8 CRITICAL Microsoft Office Outlook Remote Code Execution Vulnerability
CVE-2026-96934 9.8 CRITICAL Windows DHCP Server Remote Code Execution Vulnerability
CVE-2026-96924 9.8 CRITICAL Windows OLE Remote Code Execution Vulnerability
CVE-2026-97816 9.8 CRITICAL Microsoft OpenSSH for Windows Remote Code Execution Vulnerability
CVE-2026-83770 9.8 CRITICAL Windows Text Shaping Remote Code Execution Vulnerability
CVE-2026-97814 9.8 CRITICAL Windows Text Shaping Remote Code Execution Vulnerability
CVE-2026-97815 9.8 CRITICAL Windows Error Reporting Remote Code Execution Vulnerability
CVE-2026-96113 9.8 CRITICAL Windows Domain Name Service Remote Code Execution Vulnerability
CVE-2026-97805 9.8 CRITICAL Windows Partition Management Driver Remote Code Execution Vulnerability
CVE-2026-83748 9.8 CRITICAL Windows Error Reporting Remote Code Execution Vulnerability
CVE-2026-96909 9.8 CRITICAL Windows BitLocker Remote Code Execution Vulnerability
CVE-2026-69634 9.8 CRITICAL Windows iSCSI Remote Code Execution Vulnerability
CVE-2026-85814 9.8 CRITICAL Microsoft Windows Media Foundation Remote Code Execution Vulnerability

Showing top 20 of 1407 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same vendor: Microsoft
Same weakness: CWE-367

V. Comments for CVE-2026-62840

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