---
id: CVE-2024-26677
title: 'rxrpc: Fix delayed ACKs to not set the reference serial number'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  rxrpc: Fix delayed ACKs to not set the reference serial number

  Fix the construction of delayed ACKs to not set the reference serial number
  as they can't be used as an …
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 17926a79320afa9b95df6b977b40cca6d8713cea <
    7a72f92f42b728f0d45efa081e78d1ebaf7ac725
  - >-
    Linux >= 17926a79320afa9b95df6b977b40cca6d8713cea <
    200cb50b9e154434470c8969d32474d38475acc2
  - >-
    Linux >= 17926a79320afa9b95df6b977b40cca6d8713cea <
    63719f490e6a89896e9a463d2b45e8203eab23ae
  - >-
    Linux >= 17926a79320afa9b95df6b977b40cca6d8713cea <
    e7870cf13d20f56bfc19f9c3e89707c69cf104ef
  - Linux 2.6.22
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2024-04-02T14:58:11.213319Z'
published: '2024-04-02'
updated: '2026-10-30'
sourceUpdated: '2026-10-30T12:17:47.694Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2024-26677'
references:
  - url: 'https://git.kernel.org/stable/c/7a72f92f42b728f0d45efa081e78d1ebaf7ac725'
  - url: 'https://git.kernel.org/stable/c/200cb50b9e154434470c8969d32474d38475acc2'
  - url: 'https://git.kernel.org/stable/c/63719f490e6a89896e9a463d2b45e8203eab23ae'
  - url: 'https://git.kernel.org/stable/c/e7870cf13d20f56bfc19f9c3e89707c69cf104ef'
tags:
  - cve.org
epss: 0.00241
epssPercentile: 0.15319
ingestedAt: '2026-11-03T12:44:28.783Z'
---

## Overview

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

rxrpc: Fix delayed ACKs to not set the reference serial number

Fix the construction of delayed ACKs to not set the reference serial number
as they can't be used as an RTT reference.

## Affected

- `Linux >= 17926a79320afa9b95df6b977b40cca6d8713cea < 7a72f92f42b728f0d45efa081e78d1ebaf7ac725`
- `Linux >= 17926a79320afa9b95df6b977b40cca6d8713cea < 200cb50b9e154434470c8969d32474d38475acc2`
- `Linux >= 17926a79320afa9b95df6b977b40cca6d8713cea < 63719f490e6a89896e9a463d2b45e8203eab23ae`
- `Linux >= 17926a79320afa9b95df6b977b40cca6d8713cea < e7870cf13d20f56bfc19f9c3e89707c69cf104ef`
- `Linux 2.6.22`

## Remediation

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