FKIE_CVE-2026-31612

Vulnerability from fkie_nvd - Published: 2026-04-24 15:16 - Updated: 2026-04-24 17:51
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: ksmbd: validate EaNameLength in smb2_get_ea() smb2_get_ea() reads ea_req->EaNameLength from the client request and passes it directly to strncmp() as the comparison length without verifying that the length of the name really is the size of the input buffer received. Fix this up by properly checking the size of the name based on the value received and the overall size of the request, to prevent a later strncmp() call to use the length as a "trusted" size of the buffer. Without this check, uninitialized heap values might be slowly leaked to the client.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/243b206bcb5a7137e8bddd57b2eec81e1ebd3859
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3363a770b193f555f29d76ddf4ced3305c0ccf6d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/551dfb15b182abad4600eaf7b37e6eb7000d5b1b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/dfc6878d14acafffbe670bf2576620757a10a3d8
Impacted products
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{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: validate EaNameLength in smb2_get_ea()\n\nsmb2_get_ea() reads ea_req-\u003eEaNameLength from the client request and\npasses it directly to strncmp() as the comparison length without\nverifying that the length of the name really is the size of the input\nbuffer received.\n\nFix this up by properly checking the size of the name based on the value\nreceived and the overall size of the request, to prevent a later\nstrncmp() call to use the length as a \"trusted\" size of the buffer.\nWithout this check, uninitialized heap values might be slowly leaked to\nthe client."
    }
  ],
  "id": "CVE-2026-31612",
  "lastModified": "2026-04-24T17:51:40.810",
  "metrics": {},
  "published": "2026-04-24T15:16:40.460",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/243b206bcb5a7137e8bddd57b2eec81e1ebd3859"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3363a770b193f555f29d76ddf4ced3305c0ccf6d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/551dfb15b182abad4600eaf7b37e6eb7000d5b1b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/dfc6878d14acafffbe670bf2576620757a10a3d8"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


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