{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2023-54250",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2023-54250"
  ],
  "published": "2025-12-30T12:20:26Z",
  "summary": "ksmbd: avoid out of bounds access in decode_preauth_ctxt()",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: avoid out of bounds access in decode_preauth_ctxt()\n\nConfirm that the accessed pneg_ctxt->HashAlgorithms address sits within\nthe SMB request boundary; deassemble_neg_contexts() only checks that the\neight byte smb2_neg_context header + (client controlled) DataLength are\nwithin the packet boundary, which is insufficient.\n\nChecking for sizeof(struct smb2_preauth_neg_context) is overkill given\nthat the type currently assumes SMB311_SALT_SIZE bytes of trailing Salt.",
  "affected": [
    {
      "package": {
        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
      },
      "versions": [
        "1:6.1.21-1+rpt1"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "linux-image-6.1.0-rpi1-rpi-v6",
            "binary_version": "1:6.1.21-1+rpt1"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi1-rpi-v7",
            "binary_version": "1:6.1.21-1+rpt1"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi1-rpi-v7l",
            "binary_version": "1:6.1.21-1+rpt1"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi1-rpi-v8",
            "binary_version": "1:6.1.21-1+rpt1"
          }
        ]
      },
      "database_specific": {
        "per_version": {
          "1:6.1.21-1+rpt1": {
            "linux_commit": "0afb5e98488aed7017b9bf321b575d0177feb7ed",
            "upstream_version": "6.1.21",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.1.25"
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2023-54250"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/39f5b4b313b445c980a2a295bed28228c29228ed"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/a2f6ded41bec1d3be643c80a5eb97f1680309001"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/f02edb9debbd36f44efa7567031485892c7df60d"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/e7067a446264a7514fa1cfaa4052cdb6803bc6a2"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-08-05T11:24:39Z"
  }
}