Live › vulnerability › CVE-2026-98681
Go to dashboardIn the Linux kernel's CIFS/SMB client, several flags in struct cifsFileInfo share one bitfield byte but are updated under different locks, so concurrent writes can overwrite each other. The sources describe a memory-corruption-style race in kernel state but do not state a concrete attacker outcome.
Summary written from the sources below. Check the originals before acting.
First seen by InfraStack 2026-10-23 21:57 UTC. All times on this page are UTC.
No product ranges from the sources yet.
Each row is the first time that source carried this signal. The analyst’s rows are its own findings.
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.
This page as .md · .json · in your agent: get_signal("CVE-2026-98681")
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