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CVE-2025-22108

Estado: ModificadaMedia (5.5)—

In the Linux kernel, the following vulnerability has been resolved:

bnxt_en: Mask the bd_cnt field in the TX BD properly

The bd_cnt field in the TX BD specifies the total number of BDs for the TX packet. The bd_cnt field has 5 bits and the maximum number supported is 32 with the value 0.

CONFIG_MAX_SKB_FRAGS can be modified and the total number of SKB fragments can approach or exceed the maximum supported by the chip. Add a macro to properly mask the bd_cnt field so that the value 32 will be properly masked and set to 0 in the bd_cnd field.

Without this patch, the out-of-range bd_cnt value will corrupt the TX BD and may cause TX timeout.

Leer descripción completaMostrar menos

The next patch will check for values exceeding 32.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2025-22108",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 8.6,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H",
          "integrityImpact": "LOW",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "LOW"
        },
        "impactScore": 4.7,
        "exploitabilityScore": 3.9
      },
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 5.5,
          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 1.8
      }
    ]
  },
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3948b05950fdd64002a5f182c65ba5cf2d53cf71",
              "lessThan": "9ee185e0f15594017a6f1a191ebe6630cfea5f74",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "3948b05950fdd64002a5f182c65ba5cf2d53cf71",
              "lessThan": "f60b41b815826f15c4d0323f923f398c423178d0",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "3948b05950fdd64002a5f182c65ba5cf2d53cf71",
              "lessThan": "107b25db61122d8f990987895c2912927b8b6e3f",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/net/ethernet/broadcom/bnxt/bnxt.c",
            "drivers/net/ethernet/broadcom/bnxt/bnxt.h",
            "drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.4"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "6.4",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.12.109",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.14.2",
              "versionType": "semver",
              "lessThanOrEqual": "6.14.*"
            },
            {
              "status": "unaffected",
              "version": "6.15",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/net/ethernet/broadcom/bnxt/bnxt.c",
            "drivers/net/ethernet/broadcom/bnxt/bnxt.h",
            "drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2025-04-16T15:16:05.083",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/107b25db61122d8f990987895c2912927b8b6e3f",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/9ee185e0f15594017a6f1a191ebe6630cfea5f74",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/f60b41b815826f15c4d0323f923f398c423178d0",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbnxt_en: Mask the bd_cnt field in the TX BD properly\n\nThe bd_cnt field in the TX BD specifies the total number of BDs for\nthe TX packet.  The bd_cnt field has 5 bits and the maximum number\nsupported is 32 with the value 0.\n\nCONFIG_MAX_SKB_FRAGS can be modified and the total number of SKB\nfragments can approach or exceed the maximum supported by the chip.\nAdd a macro to properly mask the bd_cnt field so that the value 32\nwill be properly masked and set to 0 in the bd_cnd field.\n\nWithout this patch, the out-of-range bd_cnt value will corrupt the\nTX BD and may cause TX timeout.\n\nThe next patch will check for values exceeding 32."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: bnxt_en: Enmascarar correctamente el campo bd_cnt en el TX BD El campo bd_cnt en el TX BD especifica el número total de BD para el paquete TX. El campo bd_cnt tiene 5 bits y el número máximo admitido es 32 con el valor 0. CONFIG_MAX_SKB_FRAGS se puede modificar y el número total de fragmentos SKB puede acercarse o superar el máximo admitido por el chip. Agregue una macro para enmascarar correctamente el campo bd_cnt para que el valor 32 se enmascare correctamente y se establezca en 0 en el campo bd_cnd. Sin este parche, el valor bd_cnt fuera de rango corromperá el TX BD y puede causar tiempo de espera de TX. El siguiente parche verificará los valores que excedan 32."
    }
  ],
  "lastModified": "2026-09-07T16:17:27.353",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "C226DDBC-3E96-4B0C-9791-77DE3AE5D84B",
              "versionEndExcluding": "6.14.2",
              "versionStartIncluding": "6.4"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}