CVE-2026-80707

Estado: RecibidaAlta (7.5)—

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

can: j1939: transport: j1939_session_fresh_new(): initialize receive buffer

Zero the allocated buffer in j1939_session_fresh_new() to ensure it contains no residual data.

While there is a potential performance impact if users allocate maximum sized ETP buffers, most real-world use cases are not noticeably affected since the maximum known buffer size is typically around 65K.

[mkl: add Message-ID]

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Puntuación base: 7.5

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.58%
Percentil entre todas las CVEs puntuadas: 46
Fecha de la puntuación: 6/10/2026

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.

ExplotaciónT1190 Exploit Public-Facing Applicationinitial access75 %
Impacto principalT1005 Data from Local Systemcollection65 %

Vulnerabilidad en kernel Linux (AV:N/AC:L/PR:N) accesible por red sin privilegios. Lectura de datos residuales en buffer no inicializado (C:H) sugiere disclosure de memoria.

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 Privileged Account Management Network Segmentation Limit Access to Resource Over Network Filter Network Traffic Application Isolation and Sandboxing

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Linux — Linux Kernel^AI

Referencias

JSON original (NVD)

Mostrar

{
  "id": "CVE-2026-80707",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.5,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "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": "9d71dd0c70099914fcd063135da3c580865e924c",
              "lessThan": "348818277a3646d5b9fa60c9d20c00dc4bc86832",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "9d71dd0c70099914fcd063135da3c580865e924c",
              "lessThan": "f3e120a34b336079479fa10f706f0636eaa6e751",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "9d71dd0c70099914fcd063135da3c580865e924c",
              "lessThan": "bbfa49d1e287de44994955b44d19281be3195b44",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "9d71dd0c70099914fcd063135da3c580865e924c",
              "lessThan": "194d67e92197eb820f4c2c6605d9721333b3eba0",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "9d71dd0c70099914fcd063135da3c580865e924c",
              "lessThan": "038bad8e16c2e28acf31f0b527a816fb23a57269",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "9d71dd0c70099914fcd063135da3c580865e924c",
              "lessThan": "8604a3b81b9d0ceaf04fee5f52e701f623a179f9",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "9d71dd0c70099914fcd063135da3c580865e924c",
              "lessThan": "d5b3613c7d69d8dcb4dd6704f1f463198ce9f6cf",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "9d71dd0c70099914fcd063135da3c580865e924c",
              "lessThan": "eb96c58907922546e415e545fe9a14ea63b02719",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "net/can/j1939/transport.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.4"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "5.4",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "5.10.265",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "status": "unaffected",
              "version": "5.15.216",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "status": "unaffected",
              "version": "6.1.183",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.6.151",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.12.103",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.44",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.1.8",
              "versionType": "semver",
              "lessThanOrEqual": "7.1.*"
            },
            {
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "net/can/j1939/transport.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-08-28T08:16:56.277",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/038bad8e16c2e28acf31f0b527a816fb23a57269",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/194d67e92197eb820f4c2c6605d9721333b3eba0",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/348818277a3646d5b9fa60c9d20c00dc4bc86832",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/8604a3b81b9d0ceaf04fee5f52e701f623a179f9",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/bbfa49d1e287de44994955b44d19281be3195b44",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/d5b3613c7d69d8dcb4dd6704f1f463198ce9f6cf",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/eb96c58907922546e415e545fe9a14ea63b02719",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/f3e120a34b336079479fa10f706f0636eaa6e751",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncan: j1939: transport: j1939_session_fresh_new(): initialize receive buffer\n\nZero the allocated buffer in j1939_session_fresh_new() to ensure it\ncontains no residual data.\n\nWhile there is a potential performance impact if users allocate maximum\nsized ETP buffers, most real-world use cases are not noticeably affected\nsince the maximum known buffer size is typically around 65K.\n\n[mkl: add Message-ID]"
    }
  ],
  "lastModified": "2026-08-29T07:16:52.223",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}