Products
Linux kernel
Source
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Tags
CVE-2021-47416 details
Last Modified : May 21, 2024, 4:53 p.m.
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.
CVSS Score
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
---|
Weakness
Weakness | Name | Description |
---|
References
URL | Source |
---|---|
https://git.kernel.org/stable/c/064c2616234a7394867c924b5c1303974f3a4f4d | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
https://git.kernel.org/stable/c/0d2dd40a7be61b89a7c99dae8ee96389d27b413a | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
https://git.kernel.org/stable/c/2250392d930bd0d989f24d355d6355b0150256e7 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
https://git.kernel.org/stable/c/2397b9e118721292429fea8807a698e71b94795f | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
https://git.kernel.org/stable/c/25e9f88c7e3cc35f5e3d3db199660d28a15df639 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
https://git.kernel.org/stable/c/414bb4ead1362ef2c8592db723c017258f213988 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
https://git.kernel.org/stable/c/ca6e11c337daf7925ff8a2aac8e84490a8691905 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
https://git.kernel.org/stable/c/f4f502a04ee1e543825af78f47eb7785015cd9f6 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |