SB20260625214 - Out-of-bounds read in Linux kernel smb client

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Main Vulnerability Database SB20260625214

SB20260625214 - Out-of-bounds read in Linux kernel smb client

Published: June 25, 2026

Security Bulletin ID SB20260625214
CSH Severity
High
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

High 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Out-of-bounds read (CVE-ID: CVE-2026-52967)

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

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber


The vulnerability allows a remote attacker to cause a denial of service or disclose sensitive information.

The vulnerability exists due to an out-of-bounds read in symlink_data() in fs/smb/client/smb2file.c when parsing SMB error context data for symlink responses. A remote attacker can send a specially crafted SMB response to cause a denial of service or disclose sensitive information.

On 32-bit architectures, malformed ErrorDataLength values can also trigger an infinite loop.


Remediation

Install update from vendor's website.

References