---
id: CVE-2026-110713
title: >-
  libsmb2 through 6.2 contains a heap out-of-bounds read vulnerability in
  smb2_decode_file_fs_volume_info and smb2_decode_file_fs_attribute_info that
  allows malicious SMB servers to read past reply buffers
summary: >-
  libsmb2 through 6.2 contains a heap out-of-bounds read vulnerability in
  smb2_decode_file_fs_volume_info and smb2_decode_file_fs_attribute_info that
  allows malicious SMB servers to read past reply buffers. Attackers controlling
  a server o…
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
vendor: sahlberg
product: libsmb2
affected:
  - libsmb2 <= 6.2
published: '2026-10-14'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T14:47:05.720'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-110713'
references:
  - url: 'https://github.com/sahlberg/libsmb2'
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/sahlberg/libsmb2/blob/d67e213a5c4e7e4969fd81f0b95e4ca5831fbba1/lib/smb2-data-filesystem-info.c#L71
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/sahlberg/libsmb2/commit/dd0bbdee24bb56f7ec95431afc07ce0a666533f7
    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-file-system-info-decoders
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
  - exploit-available
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-14T19:48:50.990448Z'
ingestedAt: '2026-10-14T16:40:32.116Z'
epss: 0.00461
epssPercentile: 0.4012
---

## Overview

libsmb2 through 6.2 contains a heap out-of-bounds read vulnerability in smb2_decode_file_fs_volume_info and smb2_decode_file_fs_attribute_info that allows malicious SMB servers to read past reply buffers. Attackers controlling a server or intercepting unsigned sessions can send crafted QUERY_INFO replies with missing or oversized name lengths to crash the client.

## Remediation

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