---
id: CVE-2026-64208
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  crypto/krb5, rxrpc: Fix lack of pre-decrypt/pre-verify length checks

  Change the krb5 crypto library to provide facilities to precheck the length
  of the message about t…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  crypto/krb5, rxrpc: Fix lack of pre-decrypt/pre-verify length checks

  Change the krb5 crypto library to provide facilities to precheck the length
  of the message about t…
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'
published: '2026-07-24'
updated: '2026-07-27'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-64208'
references:
  - url: 'https://git.kernel.org/stable/c/2b50aceafe6606ea52ed42aadd1b4d44a188aade'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/585f9f6aef5c4542ac9d6ec45cd7dbc7df9af3ff'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/9217017f4bce53dddb8d547837f1f707045d64ad'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
epss: 0.00609
epssPercentile: 0.46849
ingestedAt: '2026-07-27T06:16:49.005Z'
---

## Overview

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

crypto/krb5, rxrpc: Fix lack of pre-decrypt/pre-verify length checks

Change the krb5 crypto library to provide facilities to precheck the length
of the message about to be decrypted or verified.

Fix AF_RXRPC to make use of this to validate DATA packets secured with
RxGK.

## Remediation

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