CVE-2026-43291

Estado: AnalizadaAlta (8.3)—

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

net: nfc: nci: Fix parameter validation for packet data

Since commit 9c328f54741b ("net: nfc: nci: Add parameter validation for packet data") communication with nci nfc chips is not working any more.

The mentioned commit tries to fix access of uninitialized data, but failed to understand that in some cases the data packet is of variable length and can therefore not be compared to the maximum packet length given by the sizeof(struct).

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H
Puntuación base: 8.3

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.41%
Percentil entre todas las CVEs puntuadas: 33
Fecha de la puntuación: 5/10/2026

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).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

ExplotaciónT1210 Exploitation of Remote Serviceslateral movement75 %
Impacto principalT1499 Endpoint Denial of Serviceimpact65 %
Impacto secundarioT1005 Data from Local Systemcollection55 %

AV:A (red adyacente) sin privilegios → T1210. DoS por validación incorrecta (A:H); lectura de datos potencial por acceso a memoria sin inicializar (CWE-908, C:H).

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Vulnerability Scanning Threat Intelligence Program Privileged Account Management Network Segmentation Filter Network Traffic Disable or Remove Feature or Program

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

CWE-908

Referencias

JSON original (NVD)

Mostrar

{
  "id": "CVE-2026-43291",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 8.3,
          "attackVector": "ADJACENT_NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H",
          "integrityImpact": "LOW",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.5,
        "exploitabilityScore": 2.8
      }
    ]
  },
  "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": "8fcc7315a10a84264e55bb65ede10f0af20a983f",
              "lessThan": "a24a8a582da4426b2042e510a1080df84083b51d",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "bfdda0123dde406dbff62e7e9136037e97998a15",
              "lessThan": "f5218426f765eee22e178df9c126d974792fb6a5",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "0ba68bea1e356f466ad29449938bea12f5f3711f",
              "lessThan": "ad058a4317db7fdb3f09caa6ed536d24a62ce6a0",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "74837bca0748763a77f77db47a0bdbe63b347628",
              "lessThan": "3b91160e9a91b5a2662875417dc42dc5b0bf03ea",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "9c328f54741bd5465ca1dc717c84c04242fac2e1",
              "lessThan": "c692db813a7e3b7c3c17d6e9a3ad2a018bf1142b",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "9c328f54741bd5465ca1dc717c84c04242fac2e1",
              "lessThan": "498fc5d0d650c77e87fcc73808d4f43240c21805",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "9c328f54741bd5465ca1dc717c84c04242fac2e1",
              "lessThan": "571dcbeb8e635182bb825ae758399831805693c2",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "c395d1e548cc68e84584ffa2e3ca9796a78bf7b9",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "5.15.195",
              "lessThan": "5.15.202",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "6.1.156",
              "lessThan": "6.1.165",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "6.6.112",
              "lessThan": "6.6.128",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "6.12.53",
              "lessThan": "6.12.75",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "6.17.3",
              "lessThan": "6.18",
              "versionType": "semver"
            }
          ],
          "programFiles": [
            "net/nfc/nci/ntf.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.18"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "6.18",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "5.15.202",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "status": "unaffected",
              "version": "6.1.165",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.6.128",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.12.75",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.16",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "6.19.6",
              "versionType": "semver",
              "lessThanOrEqual": "6.19.*"
            },
            {
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "net/nfc/nci/ntf.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-05-08T14:16:36.120",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/3b91160e9a91b5a2662875417dc42dc5b0bf03ea",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/498fc5d0d650c77e87fcc73808d4f43240c21805",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/571dcbeb8e635182bb825ae758399831805693c2",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/a24a8a582da4426b2042e510a1080df84083b51d",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/ad058a4317db7fdb3f09caa6ed536d24a62ce6a0",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/c692db813a7e3b7c3c17d6e9a3ad2a018bf1142b",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/f5218426f765eee22e178df9c126d974792fb6a5",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-908"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: nfc: nci: Fix parameter validation for packet data\n\nSince commit 9c328f54741b (\"net: nfc: nci: Add parameter validation for\npacket data\") communication with nci nfc chips is not working any more.\n\nThe mentioned commit tries to fix access of uninitialized data, but\nfailed to understand that in some cases the data packet is of variable\nlength and can therefore not be compared to the maximum packet length\ngiven by the sizeof(struct)."
    }
  ],
  "lastModified": "2026-06-17T10:49:19.400",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "B24EB1FA-19B2-49D7-A69B-15888BE06274",
              "versionEndExcluding": "5.15.202",
              "versionStartIncluding": "5.15.195"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "6D250909-131F-4213-A99E-8726EA8DD00E",
              "versionEndExcluding": "6.1.165",
              "versionStartIncluding": "6.1.156"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "2232B50C-970E-4EA7-BB0C-6CC7BD863617",
              "versionEndExcluding": "6.6.128",
              "versionStartIncluding": "6.6.112"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "69ABEF66-4E13-4958-9E9A-5C26B606112A",
              "versionEndExcluding": "6.12.75",
              "versionStartIncluding": "6.12.53"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "01823571-21C8-47A7-A81B-D79D8F3C5262",
              "versionEndExcluding": "6.18",
              "versionStartIncluding": "6.17.3"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "E0D300DB-AA68-4962-981D-EF9F5E97AACF",
              "versionEndExcluding": "6.18.16",
              "versionStartIncluding": "6.18"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "373EEEDA-FAA1-4FB4-B6ED-DB4DD99DBE67",
              "versionEndExcluding": "6.19.6",
              "versionStartIncluding": "6.19"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}