{"cve":"CVE-2026-89506","nvd":{"published":"2026-09-11T20:19:32.917","modified":"2026-10-19T09:17:44.850","status":"Received","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/uverbs: Add UVERBS_ATTR_UHW to UVERBS_METHOD_REG_MR\n\nThe original commit missed that three drivers (mthca, irdma, siw) have UHW\ndata associated with reg_mr that cannot be passed through the ioctl. They\nalso assume that the udata cannot be NULL, so failing to pass a valid\nudata can trigger a NULL udata crash in those drivers.\n\nThis never happens in real systems since in rdma-core ibv_cmd_reg_mr_ex()\ndoes not accept a udata and those three drivers don't use it, however a\nmalicious userspace could trigger it.","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["https://git.kernel.org/stable/c/011199f46f44a9fd93a9e5ab5d7fd1328d80e9bf","https://git.kernel.org/stable/c/71d5c41ac583df09a7c32199bef7d42de7267d07","https://git.kernel.org/stable/c/9e71d0f4944ba5641e01db29b3256c963656d671"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:53:43.293028046+00:00"},"epss":{"cve":"CVE-2026-89506","score":0.00206,"percentile":0.10596,"date":"2026-10-25"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}