CVE-2025-68786
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.
Affected versions
Linux kernel versions
5.15
and later are affected. Fixed in
6.1.160,
6.6.120,
6.12.64,
6.18.3,
6.19
and their respective stable series.
References
The following references provide additional information about CVE-2025-68786 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.
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PatchKernel patch commithttps://git.kernel.org/stable/c/52fcbb92e0d3acfd1448b2a43b6595d540da5295
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PatchKernel patch commithttps://git.kernel.org/stable/c/571204e4758a528fbd67330bd4b0dfbdafb33dd8
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PatchKernel patch commithttps://git.kernel.org/stable/c/5d510ac31626ed157d2182149559430350cf2104
Frequently asked questions
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What is CVE-2025-68786?
CVE-2025-68786 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 5.15 onward and has been patched in 6.1.160, 6.6.120, 6.12.64 and others. CVE-2025-68786 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2025-68786?
Yes — CVE-2025-68786 has been patched. Fixed versions include 6.1.160, 6.6.120, 6.12.64 and others. If you are running Linux kernel 5.15 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2025-68786 actively exploited?
No — CVE-2025-68786 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.