CVE-2026-89506
- Source
- https://cve.org/CVERecord?id=CVE-2026-89506
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-89506.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-89506
- Downstream
- Published
- 2026-09-11T19:43:53Z
- Modified
- 2026-09-13T03:47:18Z
- Summary
- RDMA/uverbs: Add UVERBS_ATTR_UHW to UVERBS_METHOD_REG_MR
- Details
-
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.
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89506.json" }- References
-
- https://git.kernel.org/stable/c/011199f46f44a9fd93a9e5ab5d7fd1328d80e9bf
- https://git.kernel.org/stable/c/71d5c41ac583df09a7c32199bef7d42de7267d07
- https://git.kernel.org/stable/c/9e71d0f4944ba5641e01db29b3256c963656d671
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89506.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-89506
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git