CVE-2021-47567 (GCVE-0-2021-47567)

Vulnerability from cvelistv5 – Published: 2024-05-24 15:12 – Updated: 2025-05-04 12:41
VLAI?
Summary
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.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: c118c7303ad528be8ff2aea8cd1ee15452c763f0 , < dfe906da9a1abebdebe8b15bb3e66a2578f6c4c7 (git)
Affected: c118c7303ad528be8ff2aea8cd1ee15452c763f0 , < c4e3ff8b8b1d54f0c755670174c453b06e17114b (git)
Affected: c118c7303ad528be8ff2aea8cd1ee15452c763f0 , < 5bb60ea611db1e04814426ed4bd1c95d1487678e (git)
Affected: 3b234b4a6651ed6bdca94553aa0038fc7ded9271 (git)
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    Linux Linux Affected: 5.10
Unaffected: 0 , < 5.10 (semver)
Unaffected: 5.10.83 , ≤ 5.10.* (semver)
Unaffected: 5.15.6 , ≤ 5.15.* (semver)
Unaffected: 5.16 , ≤ * (original_commit_for_fix)
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Sightings

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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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