SB2026091996 - Memory leak in Linux kernel smb client

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Main Vulnerability Database SB2026091996

SB2026091996 - Memory leak in Linux kernel smb client

Published: September 19, 2026

Security Bulletin ID SB2026091996
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Denial of service

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Memory leak (CVE-ID: CVE-2026-90125)

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

CVSSv4: 5.7 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to improper resource release in smb2_new_read_req() in the SMB client when handling asynchronous SMB2 read requests after memory registration fails. A local user can issue asynchronous SMB2 read requests during a memory registration failure to cause a denial of service.

Only asynchronous SMB read operations are affected. On hard mounts, replayable failures can repeat the operation without a retransmission-count bound.


Remediation

Install update from vendor's website.

References