5.5

CVE-2021-47416

phy: mdio: fix memory leak

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 2.6.28 < 4.4.289
Linux ≫ Linux Kernel Version >= 4.5 < 4.9.287
Linux ≫ Linux Kernel Version >= 4.10 < 4.14.251
Linux ≫ Linux Kernel Version >= 4.15 < 4.19.211
Linux ≫ Linux Kernel Version >= 4.20 < 5.4.153
Linux ≫ Linux Kernel Version >= 5.5 < 5.10.73
Linux ≫ Linux Kernel Version >= 5.11 < 5.14.12
Linux ≫ Linux Kernel Version5.15 Updaterc1
Linux ≫ Linux Kernel Version5.15 Updaterc2
Linux ≫ Linux Kernel Version5.15 Updaterc3
Linux ≫ Linux Kernel Version5.15 Updaterc4
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.23% 0.139
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 5.5 1.8 3.6
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-401 Missing Release of Memory after Effective Lifetime

The product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse.

https://git.kernel.org/stable/c/064c2616234a7394867c924b5c1303974f3a4f4d
Patch
https://git.kernel.org/stable/c/0d2dd40a7be61b89a7c99dae8ee96389d27b413a
Patch
https://git.kernel.org/stable/c/2250392d930bd0d989f24d355d6355b0150256e7
Patch
https://git.kernel.org/stable/c/2397b9e118721292429fea8807a698e71b94795f
Patch
https://git.kernel.org/stable/c/25e9f88c7e3cc35f5e3d3db199660d28a15df639
Patch
https://git.kernel.org/stable/c/414bb4ead1362ef2c8592db723c017258f213988
Patch
https://git.kernel.org/stable/c/ca6e11c337daf7925ff8a2aac8e84490a8691905
Patch
https://git.kernel.org/stable/c/f4f502a04ee1e543825af78f47eb7785015cd9f6
Patch