CVE-2025-68786 - CVE House
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Status published Unknown CVE-2025-68786

ksmbd: skip lock-range check on equal size to avoid size==0 underflow

Vulnerability 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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

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Affected Vendor

Affected Software

Linux
Vulnerable Versions:
f44158485826c076335d6860d35872271a83791d, 5.15, 0, 6.1.160, 6.6.120, 6.12.64, 6.18.3, 6.19

Timeline

Official Publish: January 13th, 2026
Last Modified: May 11th, 2026
Added to House: July 22nd, 2026

CVSS Vectors

No vector data available

Weaknesses (CWE)

No CWE data available

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.