CVE-2021-47195
Medium
Description
In the Linux kernel, the following vulnerability has been resolved: spi: fix use-after-free of the add_lock mutex Commit 6098475d4cb4 ("spi: Fix deadlock when adding SPI controllers on SPI buses") introduced a per-controller mutex. But mutex_unlock() of said lock is called after the controller is already freed: spi_unregister_controller(ctlr) -> put_device(&ctlr->dev) -> spi_controller_release(dev) -> mutex_unlock(&ctrl->add_lock) Move the put_device() after the mutex_unlock().
SeverityMedium
CVSS5.5
Exploit probability—
Product
Linux Kernel
PublishedApr 10, 2024
First seenApr 10, 2024
How to fix
Update
- linux linux_kernel5.15.5 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 5.15.0 < v < 5.15.5 | 5.15.5 |
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