---
id: CVE-2026-43463
title: 'rxrpc, afs: Fix missing error pointer check after rxrpc_kernel_lookup_peer()'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  rxrpc, afs: Fix missing error pointer check after rxrpc_kernel_lookup_peer()

  rxrpc_kernel_lookup_peer() can also return error pointers in addition to
  NULL, so just che…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 72904d7b9bfbf2dd146254edea93958bc35bbbfe <
    d854c93b12f2076c564f595b41b93b02fd42a0f9
  - >-
    Linux >= 72904d7b9bfbf2dd146254edea93958bc35bbbfe <
    d55fa7cd4b19ba91b34b307d769c149e56ad0a75
  - >-
    Linux >= 72904d7b9bfbf2dd146254edea93958bc35bbbfe <
    54331c5dcc6d97683d7ca2788e7ef9c9505e1477
  - >-
    Linux >= 72904d7b9bfbf2dd146254edea93958bc35bbbfe <
    4245a79003adf30e67f8e9060915bd05cb31d142
  - Linux 056fc740be000d39a7dba700a935f3bbfbc664e6
  - Linux >= 6.7.3 < 6.8
  - Linux 6.8
published: '2026-05-08'
updated: '2026-10-21'
sourceUpdated: '2026-10-21T12:40:48.202Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-43463'
references:
  - url: 'https://git.kernel.org/stable/c/d854c93b12f2076c564f595b41b93b02fd42a0f9'
  - url: 'https://git.kernel.org/stable/c/d55fa7cd4b19ba91b34b307d769c149e56ad0a75'
  - url: 'https://git.kernel.org/stable/c/54331c5dcc6d97683d7ca2788e7ef9c9505e1477'
  - url: 'https://git.kernel.org/stable/c/4245a79003adf30e67f8e9060915bd05cb31d142'
tags:
  - cve.org
epss: 0.0016
epssPercentile: 0.0477
ingestedAt: '2026-10-21T12:48:53.638Z'
---

## Overview

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

rxrpc, afs: Fix missing error pointer check after rxrpc_kernel_lookup_peer()

rxrpc_kernel_lookup_peer() can also return error pointers in addition to
NULL, so just checking for NULL is not sufficient.

Fix this by:

 (1) Changing rxrpc_kernel_lookup_peer() to return -ENOMEM rather than NULL
     on allocation failure.

 (2) Making the callers in afs use IS_ERR() and PTR_ERR() to pass on the
     error code returned.

## Affected

- `Linux >= 72904d7b9bfbf2dd146254edea93958bc35bbbfe < d854c93b12f2076c564f595b41b93b02fd42a0f9`
- `Linux >= 72904d7b9bfbf2dd146254edea93958bc35bbbfe < d55fa7cd4b19ba91b34b307d769c149e56ad0a75`
- `Linux >= 72904d7b9bfbf2dd146254edea93958bc35bbbfe < 54331c5dcc6d97683d7ca2788e7ef9c9505e1477`
- `Linux >= 72904d7b9bfbf2dd146254edea93958bc35bbbfe < 4245a79003adf30e67f8e9060915bd05cb31d142`
- `Linux 056fc740be000d39a7dba700a935f3bbfbc664e6`
- `Linux >= 6.7.3 < 6.8`
- `Linux 6.8`

## Remediation

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