{"id":"CVE-2026-89506","summary":"RDMA/uverbs: Add UVERBS_ATTR_UHW to UVERBS_METHOD_REG_MR","details":"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.","modified":"2026-09-13T03:47:18.583357258Z","published":"2026-09-11T19:43:53.350Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89506.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/011199f46f44a9fd93a9e5ab5d7fd1328d80e9bf"},{"type":"WEB","url":"https://git.kernel.org/stable/c/71d5c41ac583df09a7c32199bef7d42de7267d07"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9e71d0f4944ba5641e01db29b3256c963656d671"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89506.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89506"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"5b2e45049dc06a876bc6b138218ddeb0814502ef"},{"fixed":"71d5c41ac583df09a7c32199bef7d42de7267d07"},{"fixed":"9e71d0f4944ba5641e01db29b3256c963656d671"},{"fixed":"011199f46f44a9fd93a9e5ab5d7fd1328d80e9bf"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-89506.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.17.0"},{"fixed":"6.18.50"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.2.4"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-89506.json"}}],"schema_version":"1.9.0"}