High severity · published Oct 13, 2026
CVE-2026-62840
Linux Kernel Elevation of Privilege Vulnerability
7.0
CVSS
0.2%
EPSS
No
On KEV
Description
Time-of-check time-of-use (toctou) race condition in Linux Kernel allows an authorized attacker to elevate privileges locally.
CVSS vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
High
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 11% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
L3
Linux 3P (Third Party) Distros · Microsoft
1.0.0 before 7.3 · source: vendor