CVE-2026-90172 Linux Kernel smbdirect - Use After Free

Linux kernel smbdirect contains a use-after-free caused by improper teardown order in smbdirect_accept_connect_request error path, letting attackers cause kernel memory corruption, exploit requires triggering rdma_accept_failed error.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
EPSS
0.49% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Use After Free
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
17 September 2026
Updated
15 October 2026

Vendor fix

Update to the latest Linux kernel version containing the fix for smbdirect teardown order.

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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