{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "7e86845a0346efc95fddaa97ce5cd6a8bda8c71c"
            },
            {
              "fixed": "3c97b8e76ca2bba9e8770571413aed694068e78e"
            },
            {
              "fixed": "ea0408273ccf5df1fb52d9a1b9db4d31600dcb36"
            },
            {
              "fixed": "5b06f706374c37375bdff9d21cc10e61df925a92"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.11.0"
            },
            {
              "fixed": "6.18.51"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89798.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nrpcrdma: arm rn_done before publishing the notification\n\nrpcrdma_rn_register() inserts @rn into rd_xa with xa_alloc() before\nstoring the caller's callback in rn-\u003ern_done. The xarray makes @rn\nreachable to rpcrdma_remove_one(), which walks rd_xa and invokes\nrn-\u003ern_done(rn) for every registered notification. A device removal\nthat races a fresh registration can therefore observe @rn with\nrn_done still NULL, because the notification objects are zero\nallocated by their owners, and call through a NULL function pointer.\n\nStore rn-\u003ern_done before xa_alloc() publishes @rn. The xarray's\nstore-side and load-side ordering then guarantees that any CPU which\nfinds @rn in rd_xa also observes the armed callback.\n\nrpcrdma_rn_unregister() treats a non-NULL rn_done as the sentinel\nfor a completed registration, so the early store must not survive a\nfailed registration. Clear rn_done again when xa_alloc() fails.\nWere it left set, the failed-accept cleanup path would call\nrpcrdma_rn_unregister() on an @rn that was never inserted, erasing\nan unrelated rd_xa slot and underflowing rd_kref.",
  "id": "CVE-2026-89798",
  "modified": "2026-09-18T03:30:33.917589632Z",
  "published": "2026-09-16T10:30:29.930Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3c97b8e76ca2bba9e8770571413aed694068e78e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5b06f706374c37375bdff9d21cc10e61df925a92"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ea0408273ccf5df1fb52d9a1b9db4d31600dcb36"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89798.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-89798"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "rpcrdma: arm rn_done before publishing the notification"
}