---
id: CVE-2026-100075
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  RDMA/srpt: Fix srpt_alloc_rw_ctxs() unwind counters

  When srpt_alloc_rw_ctxs() fails partway through a multi-buffer indirect
  descriptor, the unwind path destroys RDMA c…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  RDMA/srpt: Fix srpt_alloc_rw_ctxs() unwind counters

  When srpt_alloc_rw_ctxs() fails partway through a multi-buffer indirect
  descriptor, the unwind path destroys RDMA c…
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-459
vendor: linux
product: linux_kernel
affected:
  - 'linux_kernel >= 4.7, < 5.10.270'
  - 'linux_kernel >= 5.11, < 5.15.221'
  - 'linux_kernel >= 5.16, < 6.1.188'
  - 'linux_kernel >= 6.2, < 6.6.157'
  - 'linux_kernel >= 6.7, < 6.12.110'
  - 'linux_kernel >= 6.13, < 6.18.52'
  - 'linux_kernel >= 6.19, < 7.2.6'
patched:
  - linux_kernel 7.2.6
published: '2026-09-25'
updated: '2026-10-02'
sourceUpdated: '2026-10-02T15:06:42.497'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-100075'
references:
  - url: 'https://git.kernel.org/stable/c/717ab4d0614e9446bf8e2de6229464499e4008d6'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/af00051dbc9f467d4840ec709680660a3f8990fa'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/af073bd245180393bcb15d33d3990a6bdc32593a'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/b38f98e176050850f41bb6415f3a71400056623e'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/bd02d644bd19a2795c018635d273d91e45d2bb95'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/be1478849e1abb1e12dc12e14cdbf800cc6fa99a'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/f1f2252da52cdda912da9993f39f58783b01b38f'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/f65f45dfa1e6e2eaa9e11c8b8ce8857799cb189d'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-100075.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-100075'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2541431'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-100075'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-100075'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-100075.mbox
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
  - score-dispute
epss: 0.0043
epssPercentile: 0.37091
scores:
  nvd: 9.8
  vendor: 5.5
  cna: 9.8
ingestedAt: '2026-09-25T14:09:46.376Z'
---

## Overview

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

RDMA/srpt: Fix srpt_alloc_rw_ctxs() unwind counters

When srpt_alloc_rw_ctxs() fails partway through a multi-buffer indirect
descriptor, the unwind path destroys RDMA contexts but leaves stale
n_rw_ctx and n_rdma values (and a dangling rw_ctxs pointer). Later
sq_wr_avail accounting in srpt_queue_response() or srpt_write_pending()
can then subtract the wrong number of send queue credits.

Reset the counters and clear rw_ctxs after freeing the heap
allocation before returning an error.

## Affected

- `linux_kernel >= 4.7, < 5.10.270`
- `linux_kernel >= 5.11, < 5.15.221`
- `linux_kernel >= 5.16, < 6.1.188`
- `linux_kernel >= 6.2, < 6.6.157`
- `linux_kernel >= 6.7, < 6.12.110`
- `linux_kernel >= 6.13, < 6.18.52`
- `linux_kernel >= 6.19, < 7.2.6`

## Remediation

Upgrade past the affected range:

- `linux_kernel 7.2.6`

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, … · updated 2026-10-16 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-100075.json)