FKIE_CVE-2025-68786

Vulnerability from fkie_nvd - Published: 2026-01-13 16:15 - Updated: 2026-01-14 16:26
Severity ?
Summary
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
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/52fcbb92e0d3acfd1448b2a43b6595d540da5295
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/571204e4758a528fbd67330bd4b0dfbdafb33dd8
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5d510ac31626ed157d2182149559430350cf2104
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a6f4cfa3783804336491e0edcb250c25f9b59d33
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/da29cd197246c85c0473259f1cad897d9d28faea
Impacted products
Vendor Product Version
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{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: skip lock-range check on equal size to avoid size==0 underflow\n\nWhen size equals the current i_size (including 0), the code used to call\ncheck_lock_range(filp, i_size, size - 1, WRITE), which computes `size - 1`\nand can underflow for size==0. Skip the equal case."
    }
  ],
  "id": "CVE-2025-68786",
  "lastModified": "2026-01-14T16:26:00.933",
  "metrics": {},
  "published": "2026-01-13T16:15:58.357",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/52fcbb92e0d3acfd1448b2a43b6595d540da5295"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/571204e4758a528fbd67330bd4b0dfbdafb33dd8"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/5d510ac31626ed157d2182149559430350cf2104"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a6f4cfa3783804336491e0edcb250c25f9b59d33"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/da29cd197246c85c0473259f1cad897d9d28faea"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


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Detection rules are retrieved from Rulezet.