Answer in brief
CVE-2026-68457 records a Unknown severity vulnerability in ksmbd: use opener credentials for FSCTL mutations. The current sources do not mark it as known exploited. The current feed maps 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). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <a8c18434e1f0d9f7989170bdb0490c0160baf065 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <1e112c47ec5dd1942e2d4ca6e8e9b712238e20c2 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <fb1cae6302d58414ddf029e3f642711bd30243f7 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e205f3e7e8c31a47cd11efb6cf663a527177e432 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <cfb2c6f71d61ed807c9d7a7af331d406f1f31877 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <c6394bcaf254c5baf9aff43376020be5db6d3316 || >=0 <6.1.178 || >=0 <6.6.145 || >=0 <6.12.97 || >=0 <6.18.40 || >=0 <7.1.5 | a8c18434e1f0d9f7989170bdb0490c0160baf065, 1e112c47ec5dd1942e2d4ca6e8e9b712238e20c2, fb1cae6302d58414ddf029e3f642711bd30243f7, e205f3e7e8c31a47cd11efb6cf663a527177e432, cfb2c6f71d61ed807c9d7a7af331d406f1f31877, c6394bcaf254c5baf9aff43376020be5db6d3316, 6.1.178, 6.6.145, 6.12.97, 6.18.40, 7.1.5 |
Published upstream
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 15, 2026
In the Linux kernel, the following vulnerability has been resolved: ksmbd: use opener credentials for FSCTL mutations SET_SPARSE, SET_ZERO_DATA and SET_COMPRESSION operate on an open SMB handle but call VFS xattr, fallocate or fileattr helpers with the current ksmbd worker credentials. Those helpers can revalidate inode permissions, ownership and LSM policy independently of the SMB handle access mask. Run each operation with the credentials captured in the target file when the handle was opened. Keep credential handling local to these single-file FSCTLs rather than applying session credentials to the complete IOCTL handler, which also contains handle-less and multi-handle operations.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2026-68457 records a Unknown severity vulnerability in ksmbd: use opener credentials for FSCTL mutations. The current sources do not mark it as known exploited. The current feed maps 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). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <a8c18434e1f0d9f7989170bdb0490c0160baf065 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <1e112c47ec5dd1942e2d4ca6e8e9b712238e20c2 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <fb1cae6302d58414ddf029e3f642711bd30243f7 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e205f3e7e8c31a47cd11efb6cf663a527177e432 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <cfb2c6f71d61ed807c9d7a7af331d406f1f31877 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <c6394bcaf254c5baf9aff43376020be5db6d3316 || >=0 <6.1.178 || >=0 <6.6.145 || >=0 <6.12.97 || >=0 <6.18.40 || >=0 <7.1.5 | a8c18434e1f0d9f7989170bdb0490c0160baf065, 1e112c47ec5dd1942e2d4ca6e8e9b712238e20c2, fb1cae6302d58414ddf029e3f642711bd30243f7, e205f3e7e8c31a47cd11efb6cf663a527177e432, cfb2c6f71d61ed807c9d7a7af331d406f1f31877, c6394bcaf254c5baf9aff43376020be5db6d3316, 6.1.178, 6.6.145, 6.12.97, 6.18.40, 7.1.5 |
Published upstream
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 15, 2026
In the Linux kernel, the following vulnerability has been resolved: ksmbd: use opener credentials for FSCTL mutations SET_SPARSE, SET_ZERO_DATA and SET_COMPRESSION operate on an open SMB handle but call VFS xattr, fallocate or fileattr helpers with the current ksmbd worker credentials. Those helpers can revalidate inode permissions, ownership and LSM policy independently of the SMB handle access mask. Run each operation with the credentials captured in the target file when the handle was opened. Keep credential handling local to these single-file FSCTLs rather than applying session credentials to the complete IOCTL handler, which also contains handle-less and multi-handle operations.
Quoted source text, attributed separately from HOL analysis.