CVE-2023-3439

4.7 mediumEPSS 0.3%

Medium (4.7) in linux linux kernel. 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.

Severity

CVSS 3.1

4.7 medium

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

EPSS: 0.3% chance of exploitation in the next 30 days; higher than 26% of CVEs (scores of 2026-10-31)
CWE: CWE-416
Published: 2023-06-28
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

linux:linux_kernel

References

http://www.openwall.com/lists/oss-security/2023/07/02/1
https://bugzilla.redhat.com/show_bug.cgi?id=2217915
https://github.com/torvalds/linux/commit/b561275d633bcd8e0e8055ab86f1a13df75a0269
http://www.openwall.com/lists/oss-security/2023/07/02/1
https://bugzilla.redhat.com/show_bug.cgi?id=2217915

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