SB2026052992 - Integer overflow in Linux kernel smb client

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Main Vulnerability Database SB2026052992

SB2026052992 - Integer overflow in Linux kernel smb client

Published: May 29, 2026

Security Bulletin ID SB2026052992
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Integer overflow (CVE-ID: CVE-2026-46195)

CWE-ID: CWE-190 - Integer overflow

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


The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to an integer overflow in parse_sec_desc(), build_sec_desc(), and id_mode_to_cifs_acl() when processing a server-supplied security descriptor with a crafted dacloffset value. A remote attacker can return a malicious security descriptor to trigger pointer wraparound and cause a denial of service.

The issue affects 32-bit builds and can be reached through the chmod/chown rewrite paths.


Remediation

Install update from vendor's website.

References