Description
In the Linux kernel, the following vulnerability has been resolved:
ksmbd: skip lock-range check on equal size to avoid size==0 underflow
When size equals the current i_size (including 0), the code used to call check_lock_range(filp, i_size, size - 1, WRITE), which computes `size - 1` and can underflow for size==0. Skip the equal case.
Metrics
No CVSS score has been published yet.
Affected software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= f44158485826c076335d6860d35872271a83791d, < 52fcbb92e0d3acfd1448b2a43b6595d540da5295; >= f44158485826c076335d6860d35872271a83791d, < da29cd197246c85c0473259f1cad897d9d28faea; >= f44158485826c076335d6860d35872271a83791d, < a6f4cfa3783804336491e0edcb250c25f9b59d33; >= f44158485826c076335d6860d35872271a83791d, < 571204e4758a528fbd67330bd4b0dfbdafb33dd8; >= f44158485826c076335d6860d35872271a83791d, < 5d510ac31626ed157d2182149559430350cf2104 |
| Linux | Linux | 5.15 |
References
- https://git.kernel.org/stable/c/52fcbb92e0d3acfd1448b2a43b6595d540da5295
- https://git.kernel.org/stable/c/571204e4758a528fbd67330bd4b0dfbdafb33dd8
- https://git.kernel.org/stable/c/5d510ac31626ed157d2182149559430350cf2104
- https://git.kernel.org/stable/c/a6f4cfa3783804336491e0edcb250c25f9b59d33
- https://git.kernel.org/stable/c/da29cd197246c85c0473259f1cad897d9d28faea
Timeline
- Published
- Jan 13, 2026
- Last modified
- Jun 17, 2026
- NVD status
- Deferred