CVE-2023-3439: Linux Kernel

Medium severity, CVSS 4.7. EPSS: 0.3% chance of exploitation in the next 30 days.

A flaw was found in the MCTP protocol in the Linux kernel. The function mctp_unregister() reclaims the device's relevant resource when a netcard detaches. However, a running routine may be unaware of this and cause the use-after-free of the mdev->addrs object, potentially leading to a denial of service.

Affected products

• Linux Linux Kernel: from 5.15, up to and including 5.17; version 5.18 only

Published 2023-06-28. Last modified 2026-06-17.