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CVE-2026-90141

Estado: RecibidaAlta (7.3)—

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

ipvs: fix integer overflow in ftp helper port/address parsing

ip_vs_ftp_get_addrport() accumulates decimal digits into a __u16 (hport) and into unsigned char (p[]) without checking for overflow. A crafted FTP PASV/EPSV response with an over-long port or address octet wraps the value, so the helper configures the data connection with a truncated port/address.

The netfilter conntrack FTP helper had the same defect, fixed in commit 2b413fc689ba ("netfilter: nf_conntrack_ftp: avoid u16 overflows"). Apply the equivalent fix here: widen the port accumulator to u32 and reject values above 65535, and reject address octets above 255.

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).

🎯 Técnicas ATT&CK

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

Vulnerabilidad de integer overflow en parsing de FTP (AV:N, sin autenticación). Afecta a conexiones de datos FTP configuradas incorrectamente (manipulación de direcciones/puertos), permitiendo interceptación o corrupción en la capa de red.

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

Limit Access to Resource Over NetworkFilter Network TrafficEncrypt Sensitive InformationVulnerability ScanningUser TrainingPrivileged Account Management

Tecnologías afectadas (1)

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

Linux — Linux KernelAI

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-90141",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.3,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
          "integrityImpact": "LOW",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "LOW",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "LOW"
        },
        "impactScore": 3.4,
        "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": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "lessThan": "d02de9a7a7e2484da0cf37e50614840623b98a62",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "lessThan": "fc1493c905d7e0bc8830c1d83915cb7831daf1a1",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "lessThan": "50cb9b7263a2ed01f7d2f97818a800c2ee05f661",
              "versionType": "git"
            },
            {
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              "lessThan": "deaa88fa010ba0dfc554d09e006ddd1ce9945c82",
              "versionType": "git"
            },
            {
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              "lessThan": "00bcc6d679262ea42688fba1d7819ea6e56f12ef",
              "versionType": "git"
            },
            {
              "status": "affected",
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              "lessThan": "4aed450adaee3a021db27be94c61fe025b0d05ff",
              "versionType": "git"
            },
            {
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              "lessThan": "b1908bff0faaa94d55be72da65879cad632e8236",
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            {
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              "lessThan": "e625a9477d12baaff4025c5f9989184a907ea8fc",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "net/netfilter/ipvs/ip_vs_ftp.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.12"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "2.6.12",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "5.10.270",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "status": "unaffected",
              "version": "5.15.221",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "status": "unaffected",
              "version": "6.1.188",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.6.157",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.12.110",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.52",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.2.6",
              "versionType": "semver",
              "lessThanOrEqual": "7.2.*"
            },
            {
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "net/netfilter/ipvs/ip_vs_ftp.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-09-17T17:17:06.857",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/00bcc6d679262ea42688fba1d7819ea6e56f12ef",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/4aed450adaee3a021db27be94c61fe025b0d05ff",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/50cb9b7263a2ed01f7d2f97818a800c2ee05f661",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/b1908bff0faaa94d55be72da65879cad632e8236",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/d02de9a7a7e2484da0cf37e50614840623b98a62",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/deaa88fa010ba0dfc554d09e006ddd1ce9945c82",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/e625a9477d12baaff4025c5f9989184a907ea8fc",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/fc1493c905d7e0bc8830c1d83915cb7831daf1a1",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nipvs: fix integer overflow in ftp helper port/address parsing\n\nip_vs_ftp_get_addrport() accumulates decimal digits into a __u16\n(hport) and into unsigned char (p[]) without checking for overflow.\nA crafted FTP PASV/EPSV response with an over-long port or address\noctet wraps the value, so the helper configures the data connection\nwith a truncated port/address.\n\nThe netfilter conntrack FTP helper had the same defect, fixed in\ncommit 2b413fc689ba (\"netfilter: nf_conntrack_ftp: avoid u16\noverflows\"). Apply the equivalent fix here: widen the port accumulator\nto u32 and reject values above 65535, and reject address octets above\n255."
    }
  ],
  "lastModified": "2026-09-18T18:17:43.397",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}