CVE - CVE-2021-47416

CVE-ID
CVE-2021-47416	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
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.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/064c2616234a7394867c924b5c1303974f3a4f4d URL:https://git.kernel.org/stable/c/064c2616234a7394867c924b5c1303974f3a4f4d MISC:https://git.kernel.org/stable/c/0d2dd40a7be61b89a7c99dae8ee96389d27b413a URL:https://git.kernel.org/stable/c/0d2dd40a7be61b89a7c99dae8ee96389d27b413a MISC:https://git.kernel.org/stable/c/2250392d930bd0d989f24d355d6355b0150256e7 URL:https://git.kernel.org/stable/c/2250392d930bd0d989f24d355d6355b0150256e7 MISC:https://git.kernel.org/stable/c/2397b9e118721292429fea8807a698e71b94795f URL:https://git.kernel.org/stable/c/2397b9e118721292429fea8807a698e71b94795f MISC:https://git.kernel.org/stable/c/25e9f88c7e3cc35f5e3d3db199660d28a15df639 URL:https://git.kernel.org/stable/c/25e9f88c7e3cc35f5e3d3db199660d28a15df639 MISC:https://git.kernel.org/stable/c/414bb4ead1362ef2c8592db723c017258f213988 URL:https://git.kernel.org/stable/c/414bb4ead1362ef2c8592db723c017258f213988 MISC:https://git.kernel.org/stable/c/ca6e11c337daf7925ff8a2aac8e84490a8691905 URL:https://git.kernel.org/stable/c/ca6e11c337daf7925ff8a2aac8e84490a8691905 MISC:https://git.kernel.org/stable/c/f4f502a04ee1e543825af78f47eb7785015cd9f6 URL:https://git.kernel.org/stable/c/f4f502a04ee1e543825af78f47eb7785015cd9f6
Assigning CNA
kernel.org
Date Record Created
20240521	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20240521)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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