cve-2024-26710
Vulnerability from cvelistv5
Published
2024-04-03 14:55
Modified
2024-08-02 00:14
Severity
Summary
powerpc/kasan: Limit KASAN thread size increase to 32KB
References
SourceURLTags
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4297217bcf1f0948a19c2bacc6b68d92e7778ad9
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4cc31fa07445879a13750cb061bb8c2654975fcb
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b29b16bd836a838b7690f80e37f8376414c74cbe
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f1acb109505d983779bbb7e20a1ee6244d2b5736
Impacted products
VendorProduct
LinuxLinux
LinuxLinux
Show details on NVD website

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    "dateReserved": "2024-02-19T14:20:24.159Z",
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    "nvd": "{\"cve\":{\"id\":\"CVE-2024-26710\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-04-03T15:15:53.487\",\"lastModified\":\"2024-04-04T14:15:09.567\",\"vulnStatus\":\"Awaiting Analysis\",\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\npowerpc/kasan: Limit KASAN thread size increase to 32KB\\n\\nKASAN is seen to increase stack usage, to the point that it was reported\\nto lead to stack overflow on some 32-bit machines (see link).\\n\\nTo avoid overflows the stack size was doubled for KASAN builds in\\ncommit 3e8635fb2e07 (\\\"powerpc/kasan: Force thread size increase with\\nKASAN\\\").\\n\\nHowever with a 32KB stack size to begin with, the doubling leads to a\\n64KB stack, which causes build errors:\\n  arch/powerpc/kernel/switch.S:249: Error: operand out of range (0x000000000000fe50 is not between 0xffffffffffff8000 and 0x0000000000007fff)\\n\\nAlthough the asm could be reworked, in practice a 32KB stack seems\\nsufficient even for KASAN builds - the additional usage seems to be in\\nthe 2-3KB range for a 64-bit KASAN build.\\n\\nSo only increase the stack for KASAN if the stack size is \u003c 32KB.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: powerpc/kasan: limitar el aumento del tama\u00f1o del subproceso KASAN a 32 KB. Se considera que KASAN aumenta el uso de la pila, hasta el punto de que se inform\u00f3 que provoca un desbordamiento de la pila en algunas m\u00e1quinas de 32 bits ( ver enlace). Para evitar desbordamientos, el tama\u00f1o de la pila se duplic\u00f3 para las compilaciones de KASAN en el commit 3e8635fb2e07 (\\\"powerpc/kasan: Forzar el aumento del tama\u00f1o del subproceso con KASAN\\\"). Sin embargo, con un tama\u00f1o de pila de 32 KB para empezar, la duplicaci\u00f3n conduce a una pila de 64 KB, lo que provoca errores de compilaci\u00f3n: arch/powerpc/kernel/switch.S:249: Error: operando fuera de rango (0x000000000000fe50 no est\u00e1 entre 0xffffffffffff8000 y 0x00000000000007fff) Aunque el conjunto podr\u00eda modificarse, en la pr\u00e1ctica una pila de 32 KB parece suficiente incluso para compilaciones KASAN; el uso adicional parece estar en el rango de 2 a 3 KB para una compilaci\u00f3n KASAN de 64 bits. Por lo tanto, solo aumente la pila para KASAN si el tama\u00f1o de la pila es \u0026lt;32 KB.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/4297217bcf1f0948a19c2bacc6b68d92e7778ad9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/4cc31fa07445879a13750cb061bb8c2654975fcb\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b29b16bd836a838b7690f80e37f8376414c74cbe\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f1acb109505d983779bbb7e20a1ee6244d2b5736\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
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