GHSA-QH4J-6F7W-8997
Vulnerability from github – Published: 2026-10-06 09:31 – Updated: 2026-10-06 09:31In 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.
{
"affected": [],
"aliases": [
"CVE-2026-98352"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-10-06T09:18:28Z",
"severity": null
},
"details": "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.",
"id": "GHSA-qh4j-6f7w-8997",
"modified": "2026-10-06T09:31:36Z",
"published": "2026-10-06T09:31:36Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98352"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/2ae16aaa78b5edc6e6d0904c84fd9cdfb762bcda"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/31024e158b45358370a0a14ed96589e6aa62d6cb"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/6f8020fe7465f49e234a576c04e415e9d08c7878"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/74c4ed55e61f1b65ddbebc5b635d136461a1c3da"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/8f253d5893f991742464b9e7203c43fc08d0aa11"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/a82cca40139d9fcae8208901856bd5bb4051f097"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/bf88ac4867050112a6c819c8d1a7209bf48ef427"
}
],
"schema_version": "1.4.0",
"severity": []
}
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