CVE-2026-98419

Estado: RecibidaSin puntuar—

Gravedad—Sin puntuar

Probabilidad de explotación0.22 %mayor que el 12 % de las CVE

Explotación activaNono figura en el catálogo de CISA

Exploit públicoNo conocidosin código público localizado

En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad:

drop_monitor: corregir escritura fuera de límites en reset_per_cpu_data()

En reset_per_cpu_data(), al se calcula de la siguiente forma:

Dado que al incluye sizeof(struct nlattr) (la cabecera de atributo de 4 bytes), genlmsg_new() asigna al bytes de espacio final a partir de nla. Sin embargo, msg apunta a nla_data(nla), que se encuentra sizeof(struct nlattr) bytes después de nla. Por tanto, al llamar a memset(msg, 0, al) se escriben al bytes a partir de msg, superando el búfer asignado en sizeof(struct nlattr) (4 bytes) y corrompiendo skb_shared_info.

Leer descripción completaMostrar menos

Para solucionarlo, al debe representar únicamente la longitud de la carga útil, asignando el skb con genlmsg_new(nla_total_size(al), GFP_KERNEL) y poniendo a cero al bytes a partir de msg.

Detalles técnicos trazas, registros y código del informe original

    al = sizeof(struct net_dm_alert_msg);
    al += dm_hit_limit * sizeof(struct net_dm_drop_point);
    al += sizeof(struct nlattr);

    skb = genlmsg_new(al, GFP_KERNEL);
    ...
    nla = nla_reserve(skb, NLA_UNSPEC, sizeof(struct net_dm_alert_msg));
    ...
    msg = nla_data(nla);
    memset(msg, 0, al);

Traducción automática del texto original de NVD (en inglés).

CVSS

NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.22 %
Percentil entre todas las CVEs puntuadas: 12
Fecha de la puntuación: 21/10/2026

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).

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

Mostrar las 8 referencias

JSON original (NVD)

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{
  "id": "CVE-2026-98419",
  "cveTags": [],
  "metrics": {},
  "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": "683703a26e4677db437a1480682851e27c7a154f",
              "lessThan": "caf09c09e0f323015ab6777ed1bad5aa10688631",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "683703a26e4677db437a1480682851e27c7a154f",
              "lessThan": "56b12f0cd476e4d90a0e2663a80102b388ebf78c",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "683703a26e4677db437a1480682851e27c7a154f",
              "lessThan": "88d640efd655b10f9fa4e381caf777da1f17c2a6",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "683703a26e4677db437a1480682851e27c7a154f",
              "lessThan": "d54a044136b129822715e8798899af540ec7a9e9",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "683703a26e4677db437a1480682851e27c7a154f",
              "lessThan": "8a04047c6dbff2f49a561b1ff53b043f4807e855",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "683703a26e4677db437a1480682851e27c7a154f",
              "lessThan": "530ae0a1458078c7a81fbffd9ff17d42129364d9",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "683703a26e4677db437a1480682851e27c7a154f",
              "lessThan": "03b672eba4937ff18337049824a114012d57f202",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "683703a26e4677db437a1480682851e27c7a154f",
              "lessThan": "439f392084f8f7f59ab9d47a9579185accefe1d8",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "net/core/drop_monitor.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.31"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "2.6.31",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "5.10.271",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "status": "unaffected",
              "version": "5.15.222",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "status": "unaffected",
              "version": "6.1.189",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.6.158",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.12.112",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.54",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.2.8",
              "versionType": "semver",
              "lessThanOrEqual": "7.2.*"
            },
            {
              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "net/core/drop_monitor.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-10-14T14:17:53.290",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/03b672eba4937ff18337049824a114012d57f202",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/439f392084f8f7f59ab9d47a9579185accefe1d8",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/530ae0a1458078c7a81fbffd9ff17d42129364d9",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/56b12f0cd476e4d90a0e2663a80102b388ebf78c",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/88d640efd655b10f9fa4e381caf777da1f17c2a6",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/8a04047c6dbff2f49a561b1ff53b043f4807e855",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/caf09c09e0f323015ab6777ed1bad5aa10688631",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/d54a044136b129822715e8798899af540ec7a9e9",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrop_monitor: fix out-of-bounds write in reset_per_cpu_data()\n\nIn reset_per_cpu_data(), al is computed as:\n\n    al = sizeof(struct net_dm_alert_msg);\n    al += dm_hit_limit * sizeof(struct net_dm_drop_point);\n    al += sizeof(struct nlattr);\n\n    skb = genlmsg_new(al, GFP_KERNEL);\n    ...\n    nla = nla_reserve(skb, NLA_UNSPEC, sizeof(struct net_dm_alert_msg));\n    ...\n    msg = nla_data(nla);\n    memset(msg, 0, al);\n\nBecause al includes sizeof(struct nlattr) (the 4-byte attribute header),\ngenlmsg_new() allocates al bytes of tailroom starting at nla.\nHowever, msg points to nla_data(nla), which is located\nsizeof(struct nlattr) bytes past nla. Calling memset(msg, 0, al)\ntherefore writes al bytes starting from msg, exceeding the allocated\nbuffer by sizeof(struct nlattr) (4 bytes) and corrupting\nskb_shared_info.\n\nFix this by letting al represent only the payload length, allocating\nthe skb with genlmsg_new(nla_total_size(al), GFP_KERNEL), and zeroing\nal bytes from msg."
    }
  ],
  "lastModified": "2026-10-19T10:18:47.367",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}