---
id: CVE-2023-32255
title: A flaw was found in the Linux kernel's ksmbd component
summary: >-
  A flaw was found in the Linux kernel's ksmbd component. A memory leak can
  occur if a client sends a session setup request with an unknown NTLMSSP
  message type,  potentially leading to resource exhaustion.
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L'
cwe:
  - CWE-772
published: '2025-08-02'
updated: '2026-06-25'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2023-32255'
references:
  - url: 'https://access.redhat.com/security/cve/CVE-2023-32255'
    label: secalert@redhat.com
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2385884'
    label: secalert@redhat.com
  - url: >-
      https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=6d7cb549c2ca20e1f07593f15e936fd54b763028
    label: secalert@redhat.com
  - url: 'https://www.zerodayinitiative.com/advisories/ZDI-23-703/'
    label: secalert@redhat.com
tags:
  - nvd
epss: 0.00477
epssPercentile: 0.40381
zeroDay: true
ingestedAt: '2026-06-29T13:24:34.405Z'
---

## Overview

A flaw was found in the Linux kernel's ksmbd component. A memory leak can occur if a client sends a session setup request with an unknown NTLMSSP message type,  potentially leading to resource exhaustion.

## Remediation

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