CVE-2026-98366 Linux Kernel RDMA/rxe - Use After Free

Linux kernel RDMA/rxe contains a use-after-free caused by improper validation of access flags before reassigning MR's PD in rxe_rereg_user_mr(), letting local attackers cause memory corruption, exploit requires local 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
Use After Free
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
6 October 2026
Updated
15 October 2026

Vendor fix

Update to the latest Linux kernel version containing the fix for proper access flag validation before PD reassignment.

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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