Description
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.
Metrics
No CVSS score has been published yet.
Affected software
Source: the vendor's advisory (CNA). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= 5b2e45049dc06a876bc6b138218ddeb0814502ef, < 71d5c41ac583df09a7c32199bef7d42de7267d07; >= 5b2e45049dc06a876bc6b138218ddeb0814502ef, < 9e71d0f4944ba5641e01db29b3256c963656d671; >= 5b2e45049dc06a876bc6b138218ddeb0814502ef, < 011199f46f44a9fd93a9e5ab5d7fd1328d80e9bf |
| Linux | Linux | 6.17 |
References
Timeline
- Published
- Sep 11, 2026
- Last modified
- Oct 19, 2026
- NVD status
- Received