CVE-2021-47361
High
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.
SeverityHigh
CVSS7.8
Exploit probability—
Product
Linux Kernel
PublishedMay 21, 2024
First seenMay 21, 2024
How to fix
Update
- linux linux_kernel4.9.285, 4.14.249, 4.19.209, 5.4.150, 5.10.70, 5.14.9 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 4.7 ≤ v < 4.9.285, 4.10 ≤ v < 4.14.249, 4.15 ≤ v < 4.19.209, 4.20 ≤ v < 5.4.150, 5.5 ≤ v < 5.10.70, 5.11 ≤ v < 5.14.9, 5.15 | 4.9.285, 4.14.249, 4.19.209, 5.4.150, 5.10.70, 5.14.9 |
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