CVE-2026-98681: fallo en Linux
smb: client: split cifsFileInfo bitfields to avoid shared-byte RMW races
Publicada el · Actualizada el
3Vexday Risk Score
Sin señal de explotación. Ningún artefacto público de explotación conocido hasta ahora.
ssvc Trackepss 0.2%
probabilidad de explotación
0.2%top 94% de las CVE
explotación observada
noninguna fuente lo reporta
In the Linux kernel, the following vulnerability has been resolved:
smb: client: split cifsFileInfo bitfields to avoid shared-byte RMW races
The invalidHandle, swapfile, oplock_break_cancelled, offload,
and status_file_deleted fields are stored in the same bitfield byte
in struct cifsFileInfo, but are updated in different code paths that
may run simultaneously, and are protected by different locks. Since
bitfield assignments generate byte-level read-modify-write operations,
a modification to one flag can overwrite a concurrent modification to
another flag.
To avoid these races, convert these flags from a bitfield to
separate bool fields.
Productos afectados
Linux · LinuxCVEs relacionadas — Linux
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Referencias
https://git.kernel.org/stable/c/19465a9aeb664f1d710d0d22c07c31bfb7c85446https://git.kernel.org/stable/c/3786ee67658a2c80fef2544e7de2cd329e043cf9https://git.kernel.org/stable/c/3b8e7928cf1928555dc05d172dd02fb0e7692ec4https://git.kernel.org/stable/c/4165641d06ef44f3a31b77a28048b6c737e885e7https://git.kernel.org/stable/c/d9d23d115610e0342e768f6cb525d91c7b154027