SB20260507154 - Improper control of a resource through its lifetime in Linux kernel core en_accel driver

Description

This security bulletin contains information about 1 vulnerability.

1) Improper control of a resource through its lifetime (CVE-ID: CVE-2026-43199)

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 management in mlx5e_ipsec_init_macs() when handling IPsec MAC address query events. A local user can trigger the affected workqueue path to cause a denial of service.

The issue is triggered because a sleeping hardware query is invoked from atomic context, leading to a kernel "scheduling while atomic" bug.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/546de94e41e92e1f7dc6213615fb7c794d05db98
• https://git.kernel.org/stable/c/57957bc7f1865778ec9b1618e15515feb6df7eb4
• https://git.kernel.org/stable/c/859380694f434597407632c29f30fdb5e763e6cc
• https://git.kernel.org/stable/c/e1407fb7c337373dfaaae2445d828b0b9ae26a29