CVE-2025-68786
Unknown
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.
SeverityUnknown
CVSS—
Exploit probability—
Product
Linux
PublishedJan 13, 2026
First seenJan 13, 2026
How to fix
Update
- Linux Linux52fcbb92e0d3acfd1448b2a43b6595d540da5295, da29cd197246c85c0473259f1cad897d9d28faea, a6f4cfa3783804336491e0edcb250c25f9b59d33, 571204e4758a528fbd67330bd4b0dfbdafb33dd8, 5d510ac31626ed157d2182149559430350cf2104 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | f44158485826c076335d6860d35872271a83791d ≤ v < 52fcbb92e0d3acfd1448b2a43b6595d540da5295, f44158485826c076335d6860d35872271a83791d ≤ v < da29cd197246c85c0473259f1cad897d9d28faea, f44158485826c076335d6860d35872271a83791d ≤ v < a6f4cfa3783804336491e0edcb250c25f9b59d33, f44158485826c076335d6860d35872271a83791d ≤ v < 571204e4758a528fbd67330bd4b0dfbdafb33dd8, f44158485826c076335d6860d35872271a83791d ≤ v < 5d510ac31626ed157d2182149559430350cf2104, 5.15 | 52fcbb92e0d3acfd1448b2a43b6595d540da5295, da29cd197246c85c0473259f1cad897d9d28faea, a6f4cfa3783804336491e0edcb250c25f9b59d33, 571204e4758a528fbd67330bd4b0dfbdafb33dd8, 5d510ac31626ed157d2182149559430350cf2104 |
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