CVE-2026-98981 Linux Kernel - Race Condition

Linux kernel contains a race condition in namespace handling caused by unhashed dentry before detaching mounts, letting attackers cause inconsistent mount visibility during unlink/rmdir/rename operations, exploit requires concurrent mount namespace access.

CVSS base score 8.8 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.21% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Race Condition
Impact
Denial Of Service, Information Disclosure
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Published
23 October 2026
Updated
25 October 2026

Vendor fix

Update to the latest Linux kernel version containing the fix for dentry unhashed before detach_mounts.

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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