CVE-2026-98361 Linux Kernel - Broken Access Control

Linux kernel contains a broken access control vulnerability in RDMA/rxe ODP write paths caused by missing HMM_PFN_WRITE check, letting unprivileged users overwrite read-only page cache via RDMA, exploit requires unprivileged user registering ODP MR over read-only mappings.

CVSS base score 7.8 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.13% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Broken Access Control
Impact
Data Tampering
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 restored HMM_PFN_WRITE check in RDMA/rxe ODP write paths.

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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