CVE-2021-47416

Advisory lineage Upstream: 0 Downstream: 23
Analyzed
Published: 21 May 2024, 15:04
Last modified:11 May 2026, 13:54

Vulnerability Summary

Overall Risk (default)
low
22/100
CVSS Score
5.5 MEDIUM
v3.1 (nvd)
EPSS Score
0.01% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

21 May 2024, 15:04
Published
Vulnerability first disclosed
11 May 2026, 13:54
Last Modified
Vulnerability information updated

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 Metrics

  • v3.1•MEDIUM•Score: 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS Trends

Current EPSS score: 0.01%• Percentile: 2%

Techniques & Countermeasures

  • 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.

Affected Systems

  • linux•linux

    ≥ 46abc02175b3c246dd5141d878f565a8725060c9, < 25e9f88c7e3cc35f5e3d3db199660d28a15df639 | ≥ 46abc02175b3c246dd5141d878f565a8725060c9, < 2250392d930bd0d989f24d355d6355b0150256e7 | ≥ 46abc02175b3c246dd5141d878f565a8725060c9, < f4f502a04ee1e543825af78f47eb7785015cd9f6 | ≥ 46abc02175b3c246dd5141d878f565a8725060c9, < 2397b9e118721292429fea8807a698e71b94795f | ≥ 46abc02175b3c246dd5141d878f565a8725060c9, < 414bb4ead1362ef2c8592db723c017258f213988 | ≥ 46abc02175b3c246dd5141d878f565a8725060c9, < 0d2dd40a7be61b89a7c99dae8ee96389d27b413a | ≥ 46abc02175b3c246dd5141d878f565a8725060c9, < 064c2616234a7394867c924b5c1303974f3a4f4d | ≥ 46abc02175b3c246dd5141d878f565a8725060c9, < ca6e11c337daf7925ff8a2aac8e84490a8691905 | 2.6.28

  • linux•linux_kernel

    ≥ 2.6.28, < 4.4.289 | ≥ 4.5, < 4.9.287 | ≥ 4.10, < 4.14.251 | ≥ 4.15, < 4.19.211 | ≥ 4.20, < 5.4.153 | ≥ 5.5, < 5.10.73 | ≥ 5.11, < 5.14.12 | 5.15:rc1 | 5.15:rc2 | 5.15:rc3 | 5.15:rc4

References (8)