SB20260507185 - Missing Release of Resource after Effective Lifetime in Linux kernel xfrm

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Main Vulnerability Database SB20260507185

SB20260507185 - Missing Release of Resource after Effective Lifetime in Linux kernel xfrm

Published: May 7, 2026

Security Bulletin ID SB20260507185
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) Missing Release of Resource after Effective Lifetime (CVE-ID: CVE-2026-43167)

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

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


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

The vulnerability exists due to improper resource management in xfrm device event handling when processing NETDEV_UNREGISTER events for xfrm offload state. A local user can create xfrm state associated with a network device and then unregister the device to cause a denial of service.

The issue results in a leaked reference to struct net_device through struct xfrm_state, which can prevent the device from being freed.


Remediation

Install update from vendor's website.

References