GHSA-5GWV-GQXH-9P46

Vulnerability from github – Published: 2026-10-28 12:31 – Updated: 2026-10-31 15:30
VLAI
Details

In the Linux kernel, the following vulnerability has been resolved:

net/rds: don't let the rdma_cm destroy an id RDS still owns on route failure

rds_rdma_cm_event_handler_cmn() hands the return value of rdma_resolve_route() straight back to the rdma_cm on RDMA_CM_EVENT_ADDR_RESOLVED. A synchronous failure there - -ENOMEM from the route work allocation, an SA query that cannot be set up, a RoCE route with no usable device - makes addr_handler() destroy the id the event was delivered on. That id is ic->i_cm_id, and nothing clears the pointer: the connection sits in RDS_CONN_CONNECTING with a freed id until its shutdown calls rdma_disconnect() and rdma_destroy_id() on it.

The ROUTE_RESOLVED case already avoids this: rds_ib_cm_initiate_connect() forces a zero return while ic->i_cm_id == cm_id, as the comment there explains. Do the same here - drop the connection and return 0 - so the id stays RDS's to destroy from the shutdown, and the reconnect gets a fresh one.

Severity
7.0 (High)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2026-99212"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-10-28T11:17:42Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/rds: don\u0027t let the rdma_cm destroy an id RDS still owns on route failure\n\nrds_rdma_cm_event_handler_cmn() hands the return value of\nrdma_resolve_route() straight back to the rdma_cm on\nRDMA_CM_EVENT_ADDR_RESOLVED.  A synchronous failure there - -ENOMEM\nfrom the route work allocation, an SA query that cannot be set up, a\nRoCE route with no usable device - makes addr_handler() destroy the\nid the event was delivered on.  That id is ic-\u003ei_cm_id, and nothing\nclears the pointer: the connection sits in RDS_CONN_CONNECTING with a\nfreed id until its shutdown calls rdma_disconnect() and\nrdma_destroy_id() on it.\n\nThe ROUTE_RESOLVED case already avoids this: rds_ib_cm_initiate_connect()\nforces a zero return while ic-\u003ei_cm_id == cm_id, as the comment there\nexplains.  Do the same here - drop the connection and return 0 - so\nthe id stays RDS\u0027s to destroy from the shutdown, and the reconnect\ngets a fresh one.",
  "id": "GHSA-5gwv-gqxh-9p46",
  "modified": "2026-10-31T15:30:23Z",
  "published": "2026-10-28T12:31:08Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-99212"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/664fd3205cbec71ac52c005ee705cd917bb6fb1a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/91ece3efa064f0b3b3c67b9b045d9eeb4a034e43"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/92143c5d80382588d5a3047a4f14023ee9ef6485"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/98d446b7c013254a8a7b49720557676a3a851fde"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a7c7d0ff876377fea7ae876a28d6df8d9349df57"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b8f141f65885810e24fc23b8a71692db62d535bf"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e677eda15df7d5ce256654343418043c7ffd6f9b"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}



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