{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2025-40127",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2025-40127"
  ],
  "published": "2025-11-12T10:24:04Z",
  "summary": "hwrng: ks-sa - fix division by zero in ks_sa_rng_init",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nhwrng: ks-sa - fix division by zero in ks_sa_rng_init\n\nFix division by zero in ks_sa_rng_init caused by missing clock\npointer initialization. The clk_get_rate() call is performed on\nan uninitialized clk pointer, resulting in division by zero when\ncalculating delay values.\n\nAdd clock initialization code before using the clock.\n\n\n drivers/char/hw_random/ks-sa-rng.c | 7 +++++++\n 1 file changed, 7 insertions(+)",
  "affected": [
    {
      "package": {
        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
      },
      "versions": [
        "1:6.1.47-1+rpt4"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-2712",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v6",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7l",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v8",
            "binary_version": "1:6.1.47-1+rpt4"
          }
        ]
      },
      "database_specific": {
        "per_version": {
          "1:6.1.47-1+rpt4": {
            "linux_commit": "655fc658a15ae7a6f37103754adb39ba52a9a14e",
            "upstream_version": "6.1.47",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.1.156",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2025-40127"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/692a04a1e0cde1d80a33df0078c755cf02cd7268"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/d76b099011fa056950f63d05ebb6160991242f6a"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/eec7e0e19c1fa75dc65e25aa6a21ef24a03849af"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/f4238064379a91e71a9c258996acac43c50c2094"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/2b6bcce32cb5aff84588a844a4d3f6dd5353b8e2"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/55a70e1de75e5ff5f961c79a2cdc6a4468cc2bf2"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/612b1dfeb414dfa780a6316014ceddf9a74ff5c0"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-05-12T04:54:46Z"
  }
}