---
id: CVE-2026-56968
title: >-
  GNU SASL before 2.2.4 lacks sanitization of a short challenge in
  _gsasl_ntlm_client_step in the NTLM client, which could result in memory
  disclosure via a crafted server.
summary: >-
  GNU SASL before 2.2.4 lacks sanitization of a short challenge in
  _gsasl_ntlm_client_step in the NTLM client, which could result in memory
  disclosure via a crafted server.
severity: low
cvss: 3.7
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N'
cwe:
  - CWE-839
  - CWE-908
vendor: gnu
product: sasl
affected:
  - sasl < 2.2.4
  - debian_linux = 13.0
patched:
  - sasl 2.2.4
published: '2026-06-23'
updated: '2026-07-31'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-56968'
references:
  - url: 'https://ftp.gnu.org/gnu/gsasl/'
    label: cve@mitre.org
  - url: 'https://lists.debian.org/debian-security-announce/2026/msg00259.html'
    label: cve@mitre.org
  - url: 'https://lists.gnu.org/archive/html/help-gsasl/2026-06/msg00000.html'
    label: cve@mitre.org
  - url: 'https://www.gnu.org/software/gsasl/'
    label: cve@mitre.org
  - url: 'https://lists.debian.org/debian-lts-announce/2026/07/msg00049.html'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.00413
epssPercentile: 0.32951
ingestedAt: '2026-07-31T22:04:41.253Z'
---

## Overview

GNU SASL before 2.2.4 lacks sanitization of a short challenge in _gsasl_ntlm_client_step in the NTLM client, which could result in memory disclosure via a crafted server.

## Affected

- `sasl < 2.2.4`
- `debian_linux = 13.0`

## Remediation

Upgrade past the affected range:

- `sasl 2.2.4`