{"id":"CVE-2023-3439","details":"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-\u003eaddrs object, potentially leading to a denial of service.","modified":"2026-03-14T15:01:24.286912Z","published":"2023-06-28T21:15:10.517Z","references":[{"type":"FIX","url":"https://github.com/torvalds/linux/commit/b561275d633bcd8e0e8055ab86f1a13df75a0269"},{"type":"FIX","url":"http://www.openwall.com/lists/oss-security/2023/07/02/1"},{"type":"FIX","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2217915"}],"affected":[{"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-3439.json","unresolved_ranges":[{"events":[{"introduced":"5.15"},{"last_affected":"5.17"}]},{"events":[{"introduced":"0"},{"last_affected":"5.18-rc1"}]},{"events":[{"introduced":"0"},{"last_affected":"5.18-rc2"}]},{"events":[{"introduced":"0"},{"last_affected":"5.18-rc3"}]},{"events":[{"introduced":"0"},{"last_affected":"5.18-rc4"}]}]}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}