发布于3月6日3月6日 Members Huawei EulerOS: CVE-2021-47416: kernel security update Severity 5 CVSS (AV:L/AC:L/Au:S/C:N/I:N/A:C) Published 05/21/2024 Created 10/09/2024 Added 10/08/2024 Modified 01/28/2025 Description In the Linux kernel, the following vulnerability has been resolved: phy: mdio: fix memory leak Syzbot reported memory leak in MDIO bus interface, the problem was in wrong state logic. MDIOBUS_ALLOCATED indicates 2 states: 1. Bus is only allocated 2. Bus allocated and __mdiobus_register() fails, but device_register() was called In case of device_register() has been called we should call put_device() to correctly free the memory allocated for this device, but mdiobus_free() calls just kfree(dev) in case of MDIOBUS_ALLOCATED state To avoid this behaviour we need to set bus->state to MDIOBUS_UNREGISTERED _before_ calling device_register(), because put_device() should be called even in case of device_register() failure. Solution(s) huawei-euleros-2_0_sp9-upgrade-kernel huawei-euleros-2_0_sp9-upgrade-kernel-tools huawei-euleros-2_0_sp9-upgrade-kernel-tools-libs huawei-euleros-2_0_sp9-upgrade-python3-perf References https://attackerkb.com/topics/cve-2021-47416 CVE - 2021-47416 EulerOS-SA-2024-2394
