---
id: CVE-2025-38514
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  rxrpc: Fix oops due to non-existence of prealloc backlog struct

  If an AF_RXRPC service socket is opened and bound, but calls are
  preallocated, then rxrpc_alloc_incomin…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  rxrpc: Fix oops due to non-existence of prealloc backlog struct

  If an AF_RXRPC service socket is opened and bound, but calls are
  preallocated, then rxrpc_alloc_incomin…
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_kernel
affected:
  - 'linux_kernel >= 4.9, < 5.4.296'
  - 'linux_kernel >= 5.5, < 5.10.240'
  - 'linux_kernel >= 5.11, < 5.15.189'
  - 'linux_kernel >= 5.16, < 6.1.146'
  - 'linux_kernel >= 6.2, < 6.6.99'
  - 'linux_kernel >= 6.7, < 6.12.39'
  - 'linux_kernel >= 6.13, < 6.15.7'
  - linux_kernel = 6.16
  - debian_linux = 11.0
patched:
  - linux_kernel 6.15.7
published: '2025-08-16'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T22:18:44.053'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-38514'
references:
  - url: 'https://git.kernel.org/stable/c/0eef29385d715d4c7fd707b18d4a9b76c76dd5e6'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/2c2e9ebeb036f9b1b09325ec5cfdfe0e78f357c3'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/880a88f318cf1d2a0f4c0a7ff7b07e2062b434a4'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/bf0ca6a1bc4fb904b598137c6718785a107e3adf'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/d1ff5f9d2c5405681457262e23c720b08977c11f'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/efc1b2b7c1a308b60df8f36bc2d7ce16d3999364'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/f5e72b7824d08c206ce106d30cb37c4642900ccc'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/f7afb3ff01c42c49e8a143cdce400b95844bb506'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
  - cve.org
epss: 0.00369
epssPercentile: 0.30617
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-10-15T21:51:16.938257Z'
ingestedAt: '2026-10-15T22:48:25.511Z'
---

## Overview

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

rxrpc: Fix oops due to non-existence of prealloc backlog struct

If an AF_RXRPC service socket is opened and bound, but calls are
preallocated, then rxrpc_alloc_incoming_call() will oops because the
rxrpc_backlog struct doesn't get allocated until the first preallocation is
made.

Fix this by returning NULL from rxrpc_alloc_incoming_call() if there is no
backlog struct.  This will cause the incoming call to be aborted.

## Affected

- `linux_kernel >= 4.9, < 5.4.296`
- `linux_kernel >= 5.5, < 5.10.240`
- `linux_kernel >= 5.11, < 5.15.189`
- `linux_kernel >= 5.16, < 6.1.146`
- `linux_kernel >= 6.2, < 6.6.99`
- `linux_kernel >= 6.7, < 6.12.39`
- `linux_kernel >= 6.13, < 6.15.7`
- `linux_kernel = 6.16`
- `debian_linux = 11.0`

## Remediation

Upgrade past the affected range:

- `linux_kernel 6.15.7`