CVEvulnerability
CVE-2025-68786
- Status
- Deferred
- Published
- 2026-01-13
- Last modified
- 2026-06-17
- Assigner
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
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.
References
- https://git.kernel.org/stable/c/52fcbb92e0d3acfd1448b2a43b6595d540da5295 git.kernel.org
- https://git.kernel.org/stable/c/571204e4758a528fbd67330bd4b0dfbdafb33dd8 git.kernel.org
- https://git.kernel.org/stable/c/5d510ac31626ed157d2182149559430350cf2104 git.kernel.org
- https://git.kernel.org/stable/c/a6f4cfa3783804336491e0edcb250c25f9b59d33 git.kernel.org
- https://git.kernel.org/stable/c/da29cd197246c85c0473259f1cad897d9d28faea git.kernel.org