CVE-2021-47567
Medium
Description
In the Linux kernel, the following vulnerability has been resolved: powerpc/32: Fix hardlockup on vmap stack overflow Since the commit c118c7303ad5 ("powerpc/32: Fix vmap stack - Do not activate MMU before reading task struct") a vmap stack overflow results in a hard lockup. This is because emergency_ctx is still addressed with its virtual address allthough data MMU is not active anymore at that time. Fix it by using a physical address instead.
SeverityMedium
CVSS5.5
Exploit probability—
Product
Linux Kernel
PublishedMay 24, 2024
First seenMay 24, 2024
How to fix
Update
- linux linux_kernel5.10.83, 5.15.6 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 5.9.5 ≤ v < 5.10.83, 5.11 ≤ v < 5.15.6, 5.16 | 5.10.83, 5.15.6 |
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