{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2025-40337",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2025-40337"
  ],
  "published": "2025-12-09T04:10:29Z",
  "summary": "net: stmmac: Correctly handle Rx checksum offload errors",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: stmmac: Correctly handle Rx checksum offload errors\n\nThe stmmac_rx function would previously set skb->ip_summed to\nCHECKSUM_UNNECESSARY if hardware checksum offload (CoE) was enabled\nand the packet was of a known IP ethertype.\n\nHowever, this logic failed to check if the hardware had actually\nreported a checksum error. The hardware status, indicating a header or\npayload checksum failure, was being ignored at this stage. This could\ncause corrupt packets to be passed up the network stack as valid.\n\nThis patch corrects the logic by checking the `csum_none` status flag,\nwhich is set when the hardware reports a checksum error. If this flag\nis set, skb->ip_summed is now correctly set to CHECKSUM_NONE,\nensuring the kernel's network stack will perform its own validation and\nproperly handle the corrupt packet.",
  "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": null,
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2025-40337"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/63fbe0e6413279d5ea5842e2423e351ded547683"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/719fcdf29051f7471d5d433475af76219019d33d"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/1aa319e0f12d2d761a31556b82a5852c98eb0bea"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/ee0aace5f844ef59335148875d05bec8764e71e8"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-08-05T12:19:11Z"
  }
}