cve-2021-47567
Vulnerability from cvelistv5
Published
2024-05-24 15:12
Modified
2024-11-04 12:08
Severity ?
Summary
powerpc/32: Fix hardlockup on vmap stack overflow
Impacted products
LinuxLinux
LinuxLinux
Show details on NVD website


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                "id": "CVE-2021-47567",
                "options": [
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                  },
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                "role": "CISA Coordinator",
                "timestamp": "2024-06-17T17:34:28.307539Z",
                "version": "2.0.3"
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    "cna": {
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          "programFiles": [
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npowerpc/32: Fix hardlockup on vmap stack overflow\n\nSince the commit c118c7303ad5 (\"powerpc/32: Fix vmap stack - Do not\nactivate MMU before reading task struct\") a vmap stack overflow\nresults in a hard lockup. This is because emergency_ctx is still\naddressed with its virtual address allthough data MMU is not active\nanymore at that time.\n\nFix it by using a physical address instead."
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    "datePublished": "2024-05-24T15:12:54.081Z",
    "dateReserved": "2024-05-24T15:11:00.728Z",
    "dateUpdated": "2024-11-04T12:08:22.660Z",
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    "nvd": "{\"cve\":{\"id\":\"CVE-2021-47567\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-05-24T15:15:21.837\",\"lastModified\":\"2024-05-24T18:09:20.027\",\"vulnStatus\":\"Awaiting Analysis\",\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\npowerpc/32: Fix hardlockup on vmap stack overflow\\n\\nSince the commit c118c7303ad5 (\\\"powerpc/32: Fix vmap stack - Do not\\nactivate MMU before reading task struct\\\") a vmap stack overflow\\nresults in a hard lockup. This is because emergency_ctx is still\\naddressed with its virtual address allthough data MMU is not active\\nanymore at that time.\\n\\nFix it by using a physical address instead.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: powerpc/32: corrige el bloqueo f\u00edsico 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 todav\u00eda se aborda con su direcci\u00f3n virtual, aunque la MMU de datos ya no est\u00e9 activa en ese momento. Solucionarlo utilizando una direcci\u00f3n f\u00edsica en su lugar.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/5bb60ea611db1e04814426ed4bd1c95d1487678e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c4e3ff8b8b1d54f0c755670174c453b06e17114b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/dfe906da9a1abebdebe8b15bb3e66a2578f6c4c7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
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