SB20260527113 - Improper control of a resource through its lifetime in Linux kernel net mana

Description

This security bulletin contains information about 1 vulnerability.

1) Improper control of a resource through its lifetime (CVE-ID: CVE-2026-46084)

CWE-ID: CWE-664 - Improper control of a resource through its 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 shutdown in RSS queue pair destruction in mana_ib when destroying an RSS queue pair while traffic continues to arrive and the VF interface is subsequently brought up. A local user can destroy an RSS queue pair and trigger interface reinitialization while traffic is still being received to cause a denial of service.

The issue involves stale vPort RX steering configuration in firmware that can direct RX completions to reused TX completion queues.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/3be5ed233de03b00ae868cfc06e95331d8d9007c
• https://git.kernel.org/stable/c/6a2d6273b6c3581ce7b90ce17b5cbb4efd19438f
• https://git.kernel.org/stable/c/8ba804869382ce307f2a15f5f6f2adfd791f41dc
• https://git.kernel.org/stable/c/dbeb256e8dd87233d891b170c0b32a6466467036
• https://git.kernel.org/stable/c/f1ccc4d500a0b87a5599343fc2f798048836e184