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CVE-2025-68786

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CVE-2025-68786

Published: Jan 13, 2026

Modified: May 11, 2026

PUBLISHED

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.

VendorProductVersions

Linux

Linux

affected
f44158485826c076335d6860d35872271a83791d - < 52fcbb92e0d3acfd1448b2a43b6595d540da5295
affected
f44158485826c076335d6860d35872271a83791d - < da29cd197246c85c0473259f1cad897d9d28faea
affected
f44158485826c076335d6860d35872271a83791d - < a6f4cfa3783804336491e0edcb250c25f9b59d33
affected
f44158485826c076335d6860d35872271a83791d - < 571204e4758a528fbd67330bd4b0dfbdafb33dd8
affected
f44158485826c076335d6860d35872271a83791d - < 5d510ac31626ed157d2182149559430350cf2104

Linux

Linux

affected
5.15
unaffected
0 - < 5.15
unaffected
6.1.160 - <= 6.1.*
unaffected
6.6.120 - <= 6.6.*
unaffected
6.12.64 - <= 6.12.*

+2 more versions

References

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