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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2021-47416 Detail

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.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://git.kernel.org/stable/c/064c2616234a7394867c924b5c1303974f3a4f4d CVE, kernel.org Patch 
https://git.kernel.org/stable/c/0d2dd40a7be61b89a7c99dae8ee96389d27b413a CVE, kernel.org Patch 
https://git.kernel.org/stable/c/2250392d930bd0d989f24d355d6355b0150256e7 CVE, kernel.org Patch 
https://git.kernel.org/stable/c/2397b9e118721292429fea8807a698e71b94795f CVE, kernel.org Patch 
https://git.kernel.org/stable/c/25e9f88c7e3cc35f5e3d3db199660d28a15df639 CVE, kernel.org Patch 
https://git.kernel.org/stable/c/414bb4ead1362ef2c8592db723c017258f213988 CVE, kernel.org Patch 
https://git.kernel.org/stable/c/ca6e11c337daf7925ff8a2aac8e84490a8691905 CVE, kernel.org Patch 
https://git.kernel.org/stable/c/f4f502a04ee1e543825af78f47eb7785015cd9f6 CVE, kernel.org Patch 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-401 Missing Release of Memory after Effective Lifetime cwe source acceptance level NIST  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

4 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2021-47416
NVD Published Date:
05/21/2024
NVD Last Modified:
12/31/2024
Source:
kernel.org