CVE-2026-90143 Linux Kernel - Broken Authentication

Linux kernel contains a broken authentication caused by missing RCU read lock in kcm_parse_func_strparser during BPF parser execution, letting attackers trigger kernel warnings and potential instability, exploit requires kernel-level code execution.

CVSS base score 7.8 /10
High
CISA KEV
Not listed
Public exploit
None known
EPSS
0.18% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Broken Authentication
Impact
Denial Of Service, Privilege Escalation
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
17 September 2026
Updated
15 October 2026

Vendor fix

Update to the latest Linux kernel version containing the fix.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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