CVE-2023-3439

MediumCVSS 4.7/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.1 4.7/10CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-416

Affected software

Vendor	Product	Versions
n/a	Linux Kernel (mctp)	Fixed in kernel 5.18-rc5

References

http://www.openwall.com/lists/oss-security/2023/07/02/1Mailing List, Patch, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2217915Issue Tracking, Patch, Third Party Advisory
https://github.com/torvalds/linux/commit/b561275d633bcd8e0e8055ab86f1a13df75a0269Patch
http://www.openwall.com/lists/oss-security/2023/07/02/1Mailing List, Patch, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2217915Issue Tracking, Patch, Third Party Advisory
https://github.com/torvalds/linux/commit/b561275d633bcd8e0e8055ab86f1a13df75a0269Patch

Timeline

Published: Jun 28, 2023
Last modified: Jun 17, 2026
NVD status: Analyzed

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