cve-2024-42230
Vulnerability from cvelistv5
Published
2024-07-30 07:47
Modified
2024-11-05 09:38
Severity ?
Summary
powerpc/pseries: Fix scv instruction crash with kexec
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/21a741eb75f80397e5f7d3739e24d7d75e619011Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8c6506616386ce37e59b2745fc481c6713fae4f3Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c550679d604798d9fed8a5b2bb5693448a25407cPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d10e3c39001e9194b9a1bfd6979bd3fa19dccdc5Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/21a741eb75f80397e5f7d3739e24d7d75e619011Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/8c6506616386ce37e59b2745fc481c6713fae4f3Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/c550679d604798d9fed8a5b2bb5693448a25407cPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/d10e3c39001e9194b9a1bfd6979bd3fa19dccdc5Patch
Impacted products
Vendor Product Version
Linux Linux Version: 5.9
Show details on NVD website

To clipboard 

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                "id": "CVE-2024-42230",
                "options": [
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                    "Exploitation": "none"
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npowerpc/pseries: Fix scv instruction crash with kexec\n\nkexec on pseries disables AIL (reloc_on_exc), required for scv\ninstruction support, before other CPUs have been shut down. This means\nthey can execute scv instructions after AIL is disabled, which causes an\ninterrupt at an unexpected entry location that crashes the kernel.\n\nChange the kexec sequence to disable AIL after other CPUs have been\nbrought down.\n\nAs a refresher, the real-mode scv interrupt vector is 0x17000, and the\nfixed-location head code probably couldn\u0027t easily deal with implementing\nsuch high addresses so it was just decided not to support that interrupt\nat all."
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    "dateReserved": "2024-07-30T07:40:12.250Z",
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This means\\nthey can execute scv instructions after AIL is disabled, which causes an\\ninterrupt at an unexpected entry location that crashes the kernel.\\n\\nChange the kexec sequence to disable AIL after other CPUs have been\\nbrought down.\\n\\nAs a refresher, the real-mode scv interrupt vector is 0x17000, and the\\nfixed-location head code probably couldn\u0027t easily deal with implementing\\nsuch high addresses so it was just decided not to support that interrupt\\nat all.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: powerpc/pseries: corrige el fallo de la instrucci\u00f3n scv con kexec kexec en pseries desactiva AIL (reloc_on_exc), necesario para el soporte de instrucciones scv, antes de que se apaguen otras CPU. Esto significa que pueden ejecutar instrucciones scv despu\u00e9s de que AIL est\u00e9 desactivado, lo que provoca una interrupci\u00f3n en una ubicaci\u00f3n de entrada inesperada que bloquea el kernel. 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}


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