CVE-2021-47361

HighCVSS 7.8/10Last modified Jun 17, 2026

Description

In the Linux kernel, the following vulnerability has been resolved:

mcb: fix error handling in mcb_alloc_bus()

There are two bugs: 1) If ida_simple_get() fails then this code calls put_device(carrier) but we haven't yet called get_device(carrier) and probably that leads to a use after free. 2) After device_initialize() then we need to use put_device() to release the bus. This will free the internal resources tied to the device and call mcb_free_bus() which will free the rest.

Metrics

CVSS 3.1 7.8/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-416

Affected software

VendorProductVersions
LinuxLinux>= 18d28819809909c3f24bb72183a901c5e332a63d, < 8a558261fa57a6deefb0925ab1829f698b194aea; >= 18d28819809909c3f24bb72183a901c5e332a63d, < 115b07d9f47e3996430b8f2007edd9768e1f807f; >= 18d28819809909c3f24bb72183a901c5e332a63d, < 66f74ba9be9daf9c47fface6af3677f602774f6b; >= 18d28819809909c3f24bb72183a901c5e332a63d, < 7751f609eadf36b1f53712bae430019c53a16eb0; >= 18d28819809909c3f24bb72183a901c5e332a63d, < 91e4ad05bf18322b5921d1a6c9b603f6eb1694f0; >= 18d28819809909c3f24bb72183a901c5e332a63d, < 9fc198f415dee070a1de957bb5bf5921d8df3499; >= 18d28819809909c3f24bb72183a901c5e332a63d, < 25a1433216489de4abc889910f744e952cb6dbae
LinuxLinux4.7

References

Timeline

Published
May 21, 2024
Last modified
Jun 17, 2026
NVD status
Analyzed

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CVE-2021-47361: High severity, CVSS 7.8 | Vulnix