CVE-2026-97971 Linux Kernel - Broken Access Control

Linux kernel contains a broken access control vulnerability caused by taking a namespace reference before permission checks in nstree, letting attackers cause kernel crashes or context switch issues, exploit requires kernel-level access.

CVSS base score 7.8 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.12% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Broken Access Control
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
25 September 2026
Updated
15 October 2026

Vendor fix

Update to the latest Linux kernel version containing the fix for namespace reference permission checks.

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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