Strix
26.1K

CVE-2026-68419

Unknown

Last modified

CVE-2026-68419 is a vulnerability of currently unknown severity. 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..

Description

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.

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 715fdb3b30541cc8180b7cdc6aa9f8c307afdf25, < fb46d134e1b8690bed2da9005b36d32d2efd34ac; >= 5ac388db27c443dadfbb0b8b23fa7ccf429d901a, < b5029e91c63406e4f4c8d58161048b41b6f0bd8c; >= 5ac388db27c443dadfbb0b8b23fa7ccf429d901a, < ca1c29f05274b737dc964e28b97803750d7cf7ec; >= 5ac388db27c443dadfbb0b8b23fa7ccf429d901a, < dbaa37e060918c45517786e37ecab0f300b48fa9; >= 5ac388db27c443dadfbb0b8b23fa7ccf429d901a, < a846aecb931b4d65d5eafa92a0623545af46d4f2; >= 6.6.120, < 6.6.148
LinuxLinux6.7

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-68419?
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.
How severe is CVE-2026-68419?
Severity scoring for CVE-2026-68419 is pending analysis.
How do I fix CVE-2026-68419?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

How Strix Helps

Related CVEs from 2026

View all 2026CVEs →

Are you affected by CVE-2026-68419?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST