---
id: CVE-2026-93151
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  nvmet-rdma: fix response resource leak on queue teardown

  When an nvme target with rdma transport is removed while I/Os are in
  flight, a response can be posted but its …
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  nvmet-rdma: fix response resource leak on queue teardown

  When an nvme target with rdma transport is removed while I/Os are in
  flight, a response can be posted but its …
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 8f000cac6e7a6edca7ab93bafc7ed28b27c1545b <
    91cfa74f1f3772e8c3662c064a45d8633e00c78e
  - >-
    Linux >= 8f000cac6e7a6edca7ab93bafc7ed28b27c1545b <
    156ec10a8be2c33b0c279d8b2f4fe8e16fa89ef7
  - >-
    Linux >= 8f000cac6e7a6edca7ab93bafc7ed28b27c1545b <
    9584b3c30e4ee8ca315bdc12249cc6c47cf1a482
  - >-
    Linux >= 8f000cac6e7a6edca7ab93bafc7ed28b27c1545b <
    5cc3b21729d45b5af8f79891f9dedb7e6b6dbd08
  - >-
    Linux >= 8f000cac6e7a6edca7ab93bafc7ed28b27c1545b <
    ca795fc1d8a1a4ab0e6bd1d27c9adb78d4ed1a1c
  - >-
    Linux >= 8f000cac6e7a6edca7ab93bafc7ed28b27c1545b <
    d553a9dc1c45666e76d8d2ac9a4f8ff0cbf53a50
  - >-
    Linux >= 8f000cac6e7a6edca7ab93bafc7ed28b27c1545b <
    0114dd303b373522dea06053aabae34bdd33a7c4
  - Linux 4.8
published: '2026-09-17'
updated: '2026-09-18'
sourceUpdated: '2026-09-18T18:18:22.890'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-93151'
references:
  - url: 'https://git.kernel.org/stable/c/0114dd303b373522dea06053aabae34bdd33a7c4'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/156ec10a8be2c33b0c279d8b2f4fe8e16fa89ef7'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/5cc3b21729d45b5af8f79891f9dedb7e6b6dbd08'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/91cfa74f1f3772e8c3662c064a45d8633e00c78e'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/9584b3c30e4ee8ca315bdc12249cc6c47cf1a482'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/ca795fc1d8a1a4ab0e6bd1d27c9adb78d4ed1a1c'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/d553a9dc1c45666e76d8d2ac9a4f8ff0cbf53a50'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
epss: 0.0067
epssPercentile: 0.50587
ingestedAt: '2026-09-17T16:21:47.741Z'
---

## Overview

In the Linux kernel, the following vulnerability has been resolved:

nvmet-rdma: fix response resource leak on queue teardown

When an nvme target with rdma transport is removed while I/Os are in
flight, a response can be posted but its send completion is never
delivered before the connection is torn down. As a result
nvmet_rdma_send_done() and nvmet_rdma_release_rsp() are never called for
the response, and this leaks the allocated RDMA read/write context and
request SGLs.

These leaks are recreated by running blktests nvme/061 with the rdma
transport and the siw driver. Kernel kmemleak feature reports them as
follows:

  unreferenced object 0xffff88812bc490c0 (size 32):
    comm "kworker/2:1H", pid 409, jiffies 4307744490
    backtrace (crc 89afd339):
      __kmalloc_noprof+0x5f9/0x890
      sgl_alloc_order+0x7b/0x380
      nvmet_req_alloc_sgls+0x290/0x4f0 [nvmet]
      nvmet_rdma_map_sgl_keyed+0x241/0x12e0 [nvmet_rdma]
      nvmet_rdma_handle_command+0x73e/0xb80 [nvmet_rdma]
      __ib_process_cq+0x149/0x4c0 [ib_core]
      ib_cq_poll_work+0x49/0x160 [ib_core]
      process_one_work+0x8b2/0x1640
      worker_thread+0x5fd/0xfe0
      kthread+0x367/0x460
      ret_from_fork+0x655/0x9d0
      ret_from_fork_asm+0x1a/0x30

  unreferenced object 0xffff88814bd05e80 (size 64):
    comm "kworker/3:1H", pid 148, jiffies 4295195428
    backtrace (crc e35510cb):
      __kmalloc_noprof+0x5f9/0x890
      rdma_rw_ctx_init+0x333/0x1fa0 [ib_core]
      nvmet_rdma_map_sgl_keyed+0x5c8/0x12e0 [nvmet_rdma]
      nvmet_rdma_handle_command+0x73e/0xb80 [nvmet_rdma]
      __ib_process_cq+0x149/0x4c0 [ib_core]
      ib_cq_poll_work+0x49/0x160 [ib_core]
      process_one_work+0x8b2/0x1640
      worker_thread+0x5fd/0xfe0
      kthread+0x367/0x460
      ret_from_fork+0x655/0x9d0
      ret_from_fork_asm+0x1a/0x30

To avoid the memory leaks, reclaim the memory of the in-flight responses
when the queue QP is torn down. Call nvmet_rdma_free_rsp_resources()
that frees up the RDMA read/write context and the request SGLs of such
responses.

## Remediation

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