CVE-2026-98352 (GCVE-0-2026-98352)
Vulnerability from cvelistv5
Published
2026-10-06 08:46
Modified
2026-10-19 09:18
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: RDMA/rtrs-clt: Fix CQ pool leak when connect is interrupted The client borrows shared CQ credits in the ADDR_RESOLVED handler via ib_cq_pool_get(), before the peer is connected. create_cm() can return -ERESTARTSYS from wait_event_interruptible_timeout() without destroying the CM ID. The init_conns() and stop-and-destroy paths then call destroy_con_cq_qp() while cq is still NULL (no PUT) and only afterwards rdma_destroy_id(). CMA serializes the handler against rdma_destroy_id() with handler_mutex, but that does not order the GET against destroy_con_cq_qp(). If ADDR_RESOLVED has already passed the DESTROYING check, it can take con_mutex, GET credits, and then lose the con to kfree. Device unregister later hits WARN_ON(cq->cqe_used) in ib_cq_pool_cleanup(). Set a per-connection flag under con_mutex before CQ/QP teardown so a racing ADDR_RESOLVED cannot borrow credits after teardown has begun.
References
Impacted products
Vendor Product Version
Linux Linux Version: 3b89e92c2a95a39c38a3808f4528e502a39bd94d
Version: 3b89e92c2a95a39c38a3808f4528e502a39bd94d
Version: 3b89e92c2a95a39c38a3808f4528e502a39bd94d
Version: 3b89e92c2a95a39c38a3808f4528e502a39bd94d
Version: 3b89e92c2a95a39c38a3808f4528e502a39bd94d
Version: 3b89e92c2a95a39c38a3808f4528e502a39bd94d
Version: 3b89e92c2a95a39c38a3808f4528e502a39bd94d
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            "drivers/infiniband/ulp/rtrs/rtrs-clt.c",
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/rtrs-clt: Fix CQ pool leak when connect is interrupted\n\nThe client borrows shared CQ credits in the ADDR_RESOLVED handler via\nib_cq_pool_get(), before the peer is connected. create_cm() can return\n-ERESTARTSYS from wait_event_interruptible_timeout() without destroying\nthe CM ID. The init_conns() and stop-and-destroy paths then call\ndestroy_con_cq_qp() while cq is still NULL (no PUT) and only afterwards\nrdma_destroy_id().\n\nCMA serializes the handler against rdma_destroy_id() with handler_mutex,\nbut that does not order the GET against destroy_con_cq_qp(). If\nADDR_RESOLVED has already passed the DESTROYING check, it can take\ncon_mutex, GET credits, and then lose the con to kfree. Device\nunregister later hits WARN_ON(cq-\u003ecqe_used) in ib_cq_pool_cleanup().\n\nSet a per-connection flag under con_mutex before CQ/QP teardown so a\nracing ADDR_RESOLVED cannot borrow credits after teardown has begun."
        }
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      "providerMetadata": {
        "dateUpdated": "2026-10-19T09:18:03.073Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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        {
          "url": "https://git.kernel.org/stable/c/74c4ed55e61f1b65ddbebc5b635d136461a1c3da"
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          "url": "https://git.kernel.org/stable/c/6f8020fe7465f49e234a576c04e415e9d08c7878"
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        {
          "url": "https://git.kernel.org/stable/c/2ae16aaa78b5edc6e6d0904c84fd9cdfb762bcda"
        }
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      "title": "RDMA/rtrs-clt: Fix CQ pool leak when connect is interrupted",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98352",
    "datePublished": "2026-10-06T08:46:40.151Z",
    "dateReserved": "2026-09-25T10:25:14.343Z",
    "dateUpdated": "2026-10-19T09:18:03.073Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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