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CVE-2021-47567

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CVE-2021-47567

Published: May 24, 2024

Modified: May 23, 2026

PUBLISHED

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.

VendorProductVersions

Linux

Linux

affected
c118c7303ad528be8ff2aea8cd1ee15452c763f0 - < dfe906da9a1abebdebe8b15bb3e66a2578f6c4c7
affected
c118c7303ad528be8ff2aea8cd1ee15452c763f0 - < c4e3ff8b8b1d54f0c755670174c453b06e17114b
affected
c118c7303ad528be8ff2aea8cd1ee15452c763f0 - < 5bb60ea611db1e04814426ed4bd1c95d1487678e
affected
3b234b4a6651ed6bdca94553aa0038fc7ded9271
affected
5.9.5 - < 5.10

Linux

Linux

affected
5.10
unaffected
0 - < 5.10
unaffected
5.10.83 - <= 5.10.*
unaffected
5.15.6 - <= 5.15.*
unaffected
5.16 - <= *

References

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