CVE-2026-90235 Linux Kernel - Race Condition

Linux kernel contains a race condition in sunrpc xprtsock caused by improper synchronization of shared socket callback pointers, letting concurrent CPUs invoke stale callbacks, exploit requires concurrent socket operations.

CVSS base score 9.8 /10
Critical
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.62% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Race Condition
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/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 for proper synchronization of socket callbacks using READ_ONCE()/WRITE_ONCE().

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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