CVE-2026-89506

In the Linux kernel, the following vulnerability has been resolved: RDMA/uverbs: Add UVERBS_ATTR_UHW to UVERBS_METHOD_REG_MR The original commit missed that three drivers (mthca, irdma, siw) have UHW data associated with reg_mr that cannot be passed through the ioctl. They also assume that the udata cannot be NULL, so failing to pass a valid udata can trigger a NULL udata crash in those drivers. This never happens in real systems since in rdma-core ibv_cmd_reg_mr_ex() does not accept a udata and those three drivers don't use it, however a malicious userspace could trigger it.

CVSS

No CVSS.

References

Link	Resource
https://git.kernel.org/stable/c/011199f46f44a9fd93a9e5ab5d7fd1328d80e9bf
https://git.kernel.org/stable/c/71d5c41ac583df09a7c32199bef7d42de7267d07
https://git.kernel.org/stable/c/9e71d0f4944ba5641e01db29b3256c963656d671

Configurations

No configuration.

History

No history.

Information

Published : 2026-09-11 20:19

Updated : 2026-09-11 20:19

NVD link : CVE-2026-89506

Mitre link : CVE-2026-89506

CVE.ORG link : CVE-2026-89506

JSON object : View

Products Affected

No product.

CWE

No CWE.

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