FKIE_CVE-2025-40337

Vulnerability from fkie_nvd - Published: 2025-12-09 16:17 - Updated: 2026-10-14 22:10
Severity
8.2 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L
Summary
In the Linux kernel, the following vulnerability has been resolved: net: stmmac: Correctly handle Rx checksum offload errors The stmmac_rx function would previously set skb->ip_summed to CHECKSUM_UNNECESSARY if hardware checksum offload (CoE) was enabled and the packet was of a known IP ethertype. However, this logic failed to check if the hardware had actually reported a checksum error. The hardware status, indicating a header or payload checksum failure, was being ignored at this stage. This could cause corrupt packets to be passed up the network stack as valid. This patch corrects the logic by checking the `csum_none` status flag, which is set when the hardware reports a checksum error. If this flag is set, skb->ip_summed is now correctly set to CHECKSUM_NONE, ensuring the kernel's network stack will perform its own validation and properly handle the corrupt packet.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1aa319e0f12d2d761a31556b82a5852c98eb0bea
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/63fbe0e6413279d5ea5842e2423e351ded547683
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/719fcdf29051f7471d5d433475af76219019d33d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ee0aace5f844ef59335148875d05bec8764e71e8
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/stmicro/stmmac/stmmac_main.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "63fbe0e6413279d5ea5842e2423e351ded547683",
              "status": "affected",
              "version": "3c20f72f9108b2fcf30ec63d8a4203736c01ccd0",
              "versionType": "git"
            },
            {
              "lessThan": "719fcdf29051f7471d5d433475af76219019d33d",
              "status": "affected",
              "version": "3c20f72f9108b2fcf30ec63d8a4203736c01ccd0",
              "versionType": "git"
            },
            {
              "lessThan": "1aa319e0f12d2d761a31556b82a5852c98eb0bea",
              "status": "affected",
              "version": "3c20f72f9108b2fcf30ec63d8a4203736c01ccd0",
              "versionType": "git"
            },
            {
              "lessThan": "ee0aace5f844ef59335148875d05bec8764e71e8",
              "status": "affected",
              "version": "3c20f72f9108b2fcf30ec63d8a4203736c01ccd0",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/stmicro/stmmac/stmmac_main.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.2"
            },
            {
              "lessThan": "3.2",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.117",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.58",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.17.*",
              "status": "unaffected",
              "version": "6.17.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.18",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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-\u003eip_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-\u003eip_summed is now correctly set to CHECKSUM_NONE,\nensuring the kernel\u0027s network stack will perform its own validation and\nproperly handle the corrupt packet."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nnet: stmmac: Manejar correctamente los errores de descarga de suma de verificaci\u00f3n Rx\n\nLa funci\u00f3n stmmac_rx anteriormente establec\u00eda skb -\u003e ip_summed a CHECKSUM_UNNECESSARY si la descarga de suma de verificaci\u00f3n por hardware (CoE) estaba habilitada y el paquete era de un tipo de ethernet IP conocido.\n\nSin embargo, esta l\u00f3gica no verificaba si el hardware hab\u00eda reportado realmente un error de suma de verificaci\u00f3n. El estado del hardware, que indicaba un fallo de suma de verificaci\u00f3n de encabezado o de carga \u00fatil, estaba siendo ignorado en esta etapa. Esto podr\u00eda causar que paquetes corruptos se pasaran a la pila de red como v\u00e1lidos.\n\nEste parche corrige la l\u00f3gica al verificar el indicador de estado \u0027csum_none\u0027, que se establece cuando el hardware reporta un error de suma de verificaci\u00f3n. Si este indicador est\u00e1 establecido, skb -\u003e ip_summed ahora se establece correctamente a CHECKSUM_NONE, asegurando que la pila de red del kernel realizar\u00e1 su propia validaci\u00f3n y manejar\u00e1 correctamente el paquete corrupto."
    }
  ],
  "id": "CVE-2025-40337",
  "lastModified": "2026-10-14T22:10:00.210",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "LOW",
          "baseScore": 8.2,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 4.2,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      }
    ]
  },
  "published": "2025-12-09T16:17:43.923",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/1aa319e0f12d2d761a31556b82a5852c98eb0bea"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/63fbe0e6413279d5ea5842e2423e351ded547683"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/719fcdf29051f7471d5d433475af76219019d33d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ee0aace5f844ef59335148875d05bec8764e71e8"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Deferred"
}



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