Answer in brief
CVE-2026-98681 records a Unknown severity vulnerability in smb: client: split cifsFileInfo bitfields to avoid shared-byte RMW races. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=3bc303c254335dbd7c7012cc1760b12f1d5514d3 <3786ee67658a2c80fef2544e7de2cd329e043cf9 || >=3bc303c254335dbd7c7012cc1760b12f1d5514d3 <4165641d06ef44f3a31b77a28048b6c737e885e7 || >=3bc303c254335dbd7c7012cc1760b12f1d5514d3 <d9d23d115610e0342e768f6cb525d91c7b154027 || >=3bc303c254335dbd7c7012cc1760b12f1d5514d3 <19465a9aeb664f1d710d0d22c07c31bfb7c85446 | 3786ee67658a2c80fef2544e7de2cd329e043cf9, 4165641d06ef44f3a31b77a28048b6c737e885e7, d9d23d115610e0342e768f6cb525d91c7b154027, 19465a9aeb664f1d710d0d22c07c31bfb7c85446 |
| Linux/Linuxgeneric | 2.6.32 | Not reported |
| Linux/Linuxgeneric | >=3bc303c254335dbd7c7012cc1760b12f1d5514d3 <3b8e7928cf1928555dc05d172dd02fb0e7692ec4 || >=3bc303c254335dbd7c7012cc1760b12f1d5514d3 <3786ee67658a2c80fef2544e7de2cd329e043cf9 || >=3bc303c254335dbd7c7012cc1760b12f1d5514d3 <4165641d06ef44f3a31b77a28048b6c737e885e7 || >=3bc303c254335dbd7c7012cc1760b12f1d5514d3 <d9d23d115610e0342e768f6cb525d91c7b154027 || >=3bc303c254335dbd7c7012cc1760b12f1d5514d3 <19465a9aeb664f1d710d0d22c07c31bfb7c85446 | 3b8e7928cf1928555dc05d172dd02fb0e7692ec4, 3786ee67658a2c80fef2544e7de2cd329e043cf9, 4165641d06ef44f3a31b77a28048b6c737e885e7, d9d23d115610e0342e768f6cb525d91c7b154027, 19465a9aeb664f1d710d0d22c07c31bfb7c85446 |
Published upstream
Oct 18, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 21, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 18, 2026
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.
Quoted source text, attributed separately from HOL analysis.