---
id: CVE-2026-110712
title: >-
  libsmb2 through 6.2 contains a heap out-of-bounds read vulnerability in
  smb2_decode_file_all_info that allows malicious SMB servers to crash clients
  by sending an unchecked FileNameLength
summary: >-
  libsmb2 through 6.2 contains a heap out-of-bounds read vulnerability in
  smb2_decode_file_all_info that allows malicious SMB servers to crash clients
  by sending an unchecked FileNameLength. Attackers controlling the server or
  performing m…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H'
cwe:
  - CWE-125
published: '2026-10-14'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T18:17:36.103'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-110712'
references:
  - url: 'https://github.com/sahlberg/libsmb2'
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/sahlberg/libsmb2/blob/d67e213a5c4e7e4969fd81f0b95e4ca5831fbba1/lib/smb2-data-file-info.c#L202
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/sahlberg/libsmb2/commit/57bee9fb941a39307145b82e4dd1718862f30a74
    label: disclosure@vulncheck.com
  - url: 'https://hackmd.io/@haind-pwn/libsmb2-query-info-reply-oob-read'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/libsmb2-through-6.2-heap-out-of-bounds-read-via-smb2-decode-file-all-info
    label: disclosure@vulncheck.com
tags:
  - nvd
ingestedAt: '2026-10-14T16:40:32.115Z'
---

## Overview

libsmb2 through 6.2 contains a heap out-of-bounds read vulnerability in smb2_decode_file_all_info that allows malicious SMB servers to crash clients by sending an unchecked FileNameLength. Attackers controlling the server or performing man-in-the-middle on unsigned sessions can return crafted FileAllInformation replies to smb2_stat or smb2_fstat calls, crashing the client.

## Remediation

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