CVE-2021-47567
powerpc/32: Fix hardlockup on vmap stack overflow
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
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.
En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: powerpc/32: corrige el bloqueo físico en el desbordamiento de la pila de vmap Desde El commit c118c7303ad5 ("powerpc/32: corrige la pila de vmap - No activar MMU antes de leer la estructura de la tarea") un desbordamiento de la pila de vmap resulta en un bloqueo duro. Esto se debe a que Emergency_ctx todavía se aborda con su dirección virtual, aunque la MMU de datos ya no esté activa en ese momento. Solucionarlo utilizando una dirección física en su lugar.
CVSS Scores
SSVC
- Decision:Track
Timeline
- 2024-05-24 CVE Reserved
- 2024-05-24 CVE Published
- 2024-05-25 EPSS Updated
- 2024-12-19 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
CAPEC
References (5)
| URL | Tag | Source |
|---|---|---|
| https://git.kernel.org/stable/c/c118c7303ad528be8ff2aea8cd1ee15452c763f0 | Vuln. Introduced | |
| https://git.kernel.org/stable/c/3b234b4a6651ed6bdca94553aa0038fc7ded9271 | Vuln. Introduced |
| URL | Date | SRC |
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| URL | Date | SRC |
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Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 5.10 < 5.10.83 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.10 < 5.10.83" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 5.10 < 5.15.6 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.10 < 5.15.6" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 5.10 < 5.16 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.10 < 5.16" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | 5.9.5 Search vendor "Linux" for product "Linux Kernel" and version "5.9.5" | en |
Affected
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