CVE-2026-68419

CVE CVE-2026-68419EUVD EUVD-2026-55605Published 2026-08-10T12:04:39.000Z

What the advisory describes

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.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux 6.7; 6.6.120 <6.6.148; patch: 7.2-rc4; 715fdb3b30541cc8180b7cdc6aa9f8c307afdf25 <fb46d134e1b8690bed2da9005b36d32d2efd34ac; patch: 6.12.101; 5ac388db27c443dadfbb0b8b23fa7ccf429d901a <a846aecb931b4d65d5eafa92a0623545af46d4f2; 5ac388db27c443dadfbb0b8b23fa7ccf429d901a <ca1c29f05274b737dc964e28b97803750d7cf7ec; patch: 7.1.6; 5ac388db27c443dadfbb0b8b23fa7ccf429d901a <b5029e91c63406e4f4c8d58161048b41b6f0bd8c; 5ac388db27c443dadfbb0b8b23fa7ccf429d901a <dbaa37e060918c45517786e37ecab0f300b48fa9; patch: 0; patch: 6.18.42; patch: 6.6.148

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

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Linux — Linux

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