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CVE-2023-3439

Description

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.

POC

Reference

- http://www.openwall.com/lists/oss-security/2023/07/02/1

- https://github.com/torvalds/linux/commit/b561275d633bcd8e0e8055ab86f1a13df75a0269

Github

- https://github.com/anonymous-1113/CPE_verify

- https://github.com/x-s-g/Vuln-Intro