cve-2024-26885
Vulnerability from cvelistv5
Published
2024-04-17 10:27
Modified
2024-08-02 00:21
Severity
Summary
bpf: Fix DEVMAP_HASH overflow check on 32-bit arches
References
SourceURLTags
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/22079b3a423382335f47d9ed32114e6c9fe88d7cPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/225da02acdc97af01b6bc6ce1a3e5362bf01d3fbPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/250051acc21f9d4c5c595e4fcb55986ea08c4691Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/281d464a34f540de166cee74b723e97ac2515ec3Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c826502bed93970f2fd488918a7b8d5f1d30e2e3Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e89386f62ce9a9ab9a94835a9890883c23d9d52cPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/edf7990baa48de5097daa9ac02e06cb4c798a737Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html
Impacted products
VendorProduct
LinuxLinux
LinuxLinux
Show details on NVD website

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Sin embargo, en arcos de 32 bits el redondeo hacia arriba puede desbordarse a mitad de camino, porque termina haciendo un desplazamiento hacia la izquierda de 32 bits en un valor largo sin signo. Si el tama\u00f1o de un largo sin firmar es de cuatro bytes, este es un comportamiento indefinido, por lo que no hay garant\u00eda de que terminemos con un valor 0 agradable y ordenado al final. Syzbot logr\u00f3 convertir esto en un bloqueo en arm32 creando un DEVMAP_HASH con max_entries \u0026gt; 0x80000000 y luego intentando actualizarlo. 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  }
}


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