CVE-2023-3439

State: Published
Severity: 4.7 Medium
Published: Jun 28, 2023
Updated: Mar 10, 2025
Reserved: Jun 28, 2023

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.

Scores

CVSS	Score	Vector	Source
3.1	4.7 Medium	CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H	CISA-ADP

Weaknesses

CWE-416

Affected Products

Product	Versions
Linux Kernel (mctp)n/a	Fixed in kernel 5.18-rc5Affected

References

https://bugzilla.redhat.com/show_bug.cgi?id=2217915
https://github.com/torvalds/linux/commit/b561275d633bcd8e0e8055ab86f1a13df75a0269
[oss-security] 20230702 CVE-2023-3439: Linux MCTP use-after-free in mctp_sendmsgmailing-list

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.