SB2026072738 - Improper resource shutdown or release in Linux kernel xfrm

Description

This security bulletin contains information about 1 vulnerability.

1) Improper resource shutdown or release (CVE-ID: CVE-2026-64525)

CWE-ID: CWE-404 - Improper Resource Shutdown or Release

CVSSv4: 6.8 [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]

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

The vulnerability exists due to improper resource shutdown or release in xfrm policy namespace cleanup handlers when cleaning up network namespaces. A local user can repeatedly create and tear down network namespaces to cause a denial of service.

The issue can cause cleanup backlogs, excessive memory growth, and memcg OOM conditions on affected systems.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/3e52417318473782012b236d0325bf7d2266a597
• https://git.kernel.org/stable/c/91cc13978ab0bc6f669139f53e7e613a860d10e0
• https://git.kernel.org/stable/c/bca6386dc08750fc7cdcbc7683473748ba3114b9
• https://git.kernel.org/stable/c/d14ae8ef88c2c6590e107db61b6adce148cec7b3