CVE-2026-68419 (GCVE-0-2026-68419)
Vulnerability from cvelistv5
Published
2026-08-10 12:04
Modified
2026-10-19 21:09
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: RDMA/irdma: Prevent rereg_mr for non-mem regions When a QP/CQ/SRQ is created, a two step process is used where the buffer is allocated in userspace and explicitly registered with the normal reg_mr mechanism prior to creating the actual QP/CQ/SRQ object. These special registrations are indicated via an ABI field so the driver knows that they do not have a valid mkey and to skip the actual CQP command submission. Since these are real MR objects from the core's perspective, it is possible for a user application to invoke rereg_mr on them and cause a real CQP op to be emitted with the zero-initialized mkey value of 0. Fix this by preventing rereg_mr on these special regions.
References
Impacted products
Vendor Product Version
Linux Linux Version: 715fdb3b30541cc8180b7cdc6aa9f8c307afdf25
Version: 5ac388db27c443dadfbb0b8b23fa7ccf429d901a
Version: 5ac388db27c443dadfbb0b8b23fa7ccf429d901a
Version: 5ac388db27c443dadfbb0b8b23fa7ccf429d901a
Version: 5ac388db27c443dadfbb0b8b23fa7ccf429d901a
Version: 6.6.120   ≤
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