{"id":"CVE-2021-47416","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nphy: mdio: fix memory leak\n\nSyzbot reported memory leak in MDIO bus interface, the problem was in\nwrong state logic.\n\nMDIOBUS_ALLOCATED indicates 2 states:\n\t1. Bus is only allocated\n\t2. Bus allocated and __mdiobus_register() fails, but\n\t   device_register() was called\n\nIn case of device_register() has been called we should call put_device()\nto correctly free the memory allocated for this device, but mdiobus_free()\ncalls just kfree(dev) in case of MDIOBUS_ALLOCATED state\n\nTo avoid this behaviour we need to set bus-\u003estate to MDIOBUS_UNREGISTERED\n_before_ calling device_register(), because put_device() should be\ncalled even in case of device_register() failure.","modified":"2026-03-15T22:43:13.856782Z","published":"2024-05-21T15:15:27.083Z","related":["SUSE-SU-2024:1979-1","SUSE-SU-2024:1983-1","SUSE-SU-2024:2008-1","SUSE-SU-2024:2010-1","SUSE-SU-2024:2011-1","SUSE-SU-2024:2019-1","SUSE-SU-2024:2183-1","SUSE-SU-2024:2184-1","SUSE-SU-2024:2185-1","SUSE-SU-2024:2189-1","SUSE-SU-2024:2190-1","SUSE-SU-2024:3983-1","SUSE-SU-2024:3985-1","SUSE-SU-2024:4081-1","SUSE-SU-2024:4082-1","SUSE-SU-2024:4100-1","SUSE-SU-2024:4103-1","SUSE-SU-2024:4131-1","SUSE-SU-2024:4140-1","SUSE-SU-2024:4364-1","SUSE-SU-2025:0034-1"],"references":[{"type":"FIX","url":"https://git.kernel.org/stable/c/0d2dd40a7be61b89a7c99dae8ee96389d27b413a"},{"type":"FIX","url":"https://git.kernel.org/stable/c/2250392d930bd0d989f24d355d6355b0150256e7"},{"type":"FIX","url":"https://git.kernel.org/stable/c/2397b9e118721292429fea8807a698e71b94795f"},{"type":"FIX","url":"https://git.kernel.org/stable/c/25e9f88c7e3cc35f5e3d3db199660d28a15df639"},{"type":"FIX","url":"https://git.kernel.org/stable/c/414bb4ead1362ef2c8592db723c017258f213988"},{"type":"FIX","url":"https://git.kernel.org/stable/c/ca6e11c337daf7925ff8a2aac8e84490a8691905"},{"type":"FIX","url":"https://git.kernel.org/stable/c/f4f502a04ee1e543825af78f47eb7785015cd9f6"},{"type":"FIX","url":"https://git.kernel.org/stable/c/064c2616234a7394867c924b5c1303974f3a4f4d"}],"affected":[{"database_specific":{"unresolved_ranges":[{"events":[{"introduced":"2.6.28"},{"fixed":"4.4.289"}]},{"events":[{"introduced":"4.5"},{"fixed":"4.9.287"}]},{"events":[{"introduced":"4.10"},{"fixed":"4.14.251"}]},{"events":[{"introduced":"4.15"},{"fixed":"4.19.211"}]},{"events":[{"introduced":"4.20"},{"fixed":"5.4.153"}]},{"events":[{"introduced":"5.5"},{"fixed":"5.10.73"}]},{"events":[{"introduced":"5.11"},{"fixed":"5.14.12"}]},{"events":[{"introduced":"0"},{"last_affected":"5.15-rc1"}]},{"events":[{"introduced":"0"},{"last_affected":"5.15-rc2"}]},{"events":[{"introduced":"0"},{"last_affected":"5.15-rc3"}]},{"events":[{"introduced":"0"},{"last_affected":"5.15-rc4"}]}],"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-47416.json"}}],"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"}]}