SB2026081664 - Out-of-bounds read in Linux kernel smb client

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Main Vulnerability Database SB2026081664

SB2026081664 - Out-of-bounds read in Linux kernel smb client

Published: August 16, 2026

Security Bulletin ID SB2026081664
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Information disclosure

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Out-of-bounds read (CVE-ID: CVE-2026-72318)

CWE-ID: CWE-125 - Out-of-bounds read

CVSSv4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to disclose sensitive information.

The vulnerability exists due to an out-of-bounds read in parse_dfs_referrals() when processing a malicious DFS referral response from a server. A remote attacker can supply crafted referral string offsets to cause an out-of-bounds read and disclose sensitive information.

The issue occurs when DfsPathOffset or NetworkAddressOffset points beyond the end of the response buffer, leading to a negative length being forwarded as a size_t in the non-Unicode path.


Remediation

Install update from vendor's website.

References