SB2026050920 - Inclusion of Sensitive Information in Log Files in Linux kernel smb server

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Main Vulnerability Database SB2026050920

SB2026050920 - Inclusion of Sensitive Information in Log Files in Linux kernel smb server

Published: May 9, 2026

Security Bulletin ID SB2026050920
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Information disclosure

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Inclusion of Sensitive Information in Log Files (CVE-ID: CVE-2026-43377)

CWE-ID: CWE-532 - Information Exposure Through Log Files

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


The vulnerability allows a local user to disclose sensitive information.

The vulnerability exists due to insertion of sensitive information into log files in generate_smb3signingkey() and generate_smb3encryptionkey() when debug authentication logging is enabled during SMB3 signing and encryption key generation. A local user can access generated logs containing session, signing, encryption, and decryption key bytes to disclose sensitive information.

Only systems with KSMBD_DEBUG_AUTH logging enabled are affected by this exposure.


Remediation

Install update from vendor's website.

References