SB20260502140 - Integer overflow in Linux kernel smb server

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Main Vulnerability Database SB20260502140

SB20260502140 - Integer overflow in Linux kernel smb server

Published: May 2, 2026

Security Bulletin ID SB20260502140
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Data manipulation

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Integer overflow (CVE-ID: CVE-2026-31704)

CWE-ID: CWE-190 - Integer overflow

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


The vulnerability allows a local user to cause memory corruption.

The vulnerability exists due to an integer overflow in set_posix_acl_entries_dacl() and set_ntacl_dacl() when processing files with many POSIX ACL entries. A local user can create a file with many POSIX ACL entries to cause memory corruption.

The accumulated DACL size can wrap past 65535, causing subsequent writes to overwrite earlier ACE entries and resulting in a truncated DACL size value.


Remediation

Install update from vendor's website.

References