---
id: CVE-2026-98367
title: |-
  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_q…
summary: |-
  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_q…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 6c52fdc244b5ccc468006fd65a504d4ee33743c7 <
    f11e09fe2fc3a11ccdf8f932b68181b0bb1d2078
  - >-
    Linux >= 6c52fdc244b5ccc468006fd65a504d4ee33743c7 <
    e3f039082856adab7e195dea1af45d93dd6a3f1c
  - >-
    Linux >= 6c52fdc244b5ccc468006fd65a504d4ee33743c7 <
    ad50d19f3d1ce052b3a146143581e930a1efb33e
  - >-
    Linux >= 6c52fdc244b5ccc468006fd65a504d4ee33743c7 <
    030306bbb9273af80f14d7af20129661964cd9a7
  - >-
    Linux >= 6c52fdc244b5ccc468006fd65a504d4ee33743c7 <
    df2584750314336edcbcc21fb388e04b260f35b7
  - >-
    Linux >= 6c52fdc244b5ccc468006fd65a504d4ee33743c7 <
    9dcc0f4e488b70cff81e0e5717a498c929cf5de3
  - >-
    Linux >= 6c52fdc244b5ccc468006fd65a504d4ee33743c7 <
    bfdc744bf20ae4c3ef2e470298de5237c5c9a13c
  - >-
    Linux >= 6c52fdc244b5ccc468006fd65a504d4ee33743c7 <
    32cd87f54dd1070020e664ccb0312a9f0fea79b4
  - Linux 5.3
published: '2026-10-06'
updated: '2026-10-06'
sourceUpdated: '2026-10-06T09:18:30.970'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-98367'
references:
  - url: 'https://git.kernel.org/stable/c/030306bbb9273af80f14d7af20129661964cd9a7'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/32cd87f54dd1070020e664ccb0312a9f0fea79b4'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/9dcc0f4e488b70cff81e0e5717a498c929cf5de3'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/ad50d19f3d1ce052b3a146143581e930a1efb33e'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/bfdc744bf20ae4c3ef2e470298de5237c5c9a13c'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/df2584750314336edcbcc21fb388e04b260f35b7'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/e3f039082856adab7e195dea1af45d93dd6a3f1c'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/f11e09fe2fc3a11ccdf8f932b68181b0bb1d2078'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-10-06T08:50:17.391Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.