SB2026102221 - Missing Release of Resource after Effective Lifetime in Linux kernel smb client

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Main Vulnerability Database SB2026102221

SB2026102221 - Missing Release of Resource after Effective Lifetime in Linux kernel smb client

Published: October 22, 2026

Security Bulletin ID SB2026102221
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Partial DoS

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Missing Release of Resource after Effective Lifetime (CVE-ID: CVE-2026-98451)

CWE-ID: CWE-772 - Missing Release of Resource after Effective Lifetime

CVSSv4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]


The vulnerability allows a local user to exhaust kernel resources and potentially cause a denial of service.

The vulnerability exists due to missing release of dentry references in the Linux kernel SMB client's cifs_atomic_open() function when opening an existing symbolic link with O_CREAT. A local user can repeatedly perform these opens on a CIFS filesystem to accumulate unreleased references and potentially cause a denial of service.


Remediation

Install update from vendor's website.

References