{"id":"CVE-2021-47560","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nmlxsw: spectrum: Protect driver from buggy firmware\n\nWhen processing port up/down events generated by the device's firmware,\nthe driver protects itself from events reported for non-existent local\nports, but not the CPU port (local port 0), which exists, but lacks a\nnetdev.\n\nThis can result in a NULL pointer dereference when calling\nnetif_carrier_{on,off}().\n\nFix this by bailing early when processing an event reported for the CPU\nport. Problem was only observed when running on top of a buggy emulator.","modified":"2026-03-15T22:43:15.249773Z","published":"2024-05-24T15:15:20.613Z","related":["ALSA-2024:7000","ALSA-2024:7001","SUSE-SU-2024:2008-1","SUSE-SU-2024:2011-1","SUSE-SU-2024:2019-1","SUSE-SU-2024:2189-1","SUSE-SU-2024:2190-1"],"references":[{"type":"FIX","url":"https://git.kernel.org/stable/c/90d0736876c50ecde1a3275636a06b9ddb1cace9"},{"type":"FIX","url":"https://git.kernel.org/stable/c/da4d70199e5d82da664a80077508d6c18f5e76df"},{"type":"FIX","url":"https://git.kernel.org/stable/c/63b08b1f6834bbb0b4f7783bf63b80c8c8e9a047"}],"affected":[{"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-47560.json","unresolved_ranges":[{"events":[{"introduced":"5.4"},{"fixed":"5.10.83"}]},{"events":[{"introduced":"5.11"},{"fixed":"5.15.6"}]},{"events":[{"introduced":"0"},{"last_affected":"5.16-rc1"}]},{"events":[{"introduced":"0"},{"last_affected":"5.16-rc2"}]}]}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}