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CVE-2026-98029

Estado: RecibidaAlta (7)—

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

eth: nfp: bound the ntuple rule dump by the caller's buffer size

nfp_net_get_fs_loc() dumps every entry of nn->fs.list into rule_locs[] without consulting cmd->rule_cnt, which is how many entries the caller had room for. ETHTOOL_GRXCLSRLALL requires no CAP_NET_ADMIN and the ioctl sizes the buffer from the rule_cnt userspace passes in, so once an admin has installed flow steering rules any user can ask for fewer slots than there are rules and run off the end of the allocation. A rule_cnt of 0 leaves the buffer pointer NULL and the walk dereferences it.

Leer descripción completaMostrar menos

Bail out with -EMSGSIZE when the buffer fills up, the way the other ntuple capable drivers do, and report how many locations were filled so a shrinking rule list does not leave the caller reading stale slots.

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.

AV:L, PR:L indica escalada local; buffer overflow en nfp_net_get_fs_loc() permite leer memoria (C:H) o causar DoS (A:H) sin CAP_NET_ADMIN requerido.

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

Threat Intelligence ProgramFilter Network TrafficExecution PreventionApplication Isolation and SandboxingExploit ProtectionUpdate Software

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-2026-98029",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "HIGH",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 1
      }
    ]
  },
  "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": "9eb03bb1c035ff6e2c3a34046419446588253dda",
              "lessThan": "82812583b9c69c241da6da4186f14e9df2516488",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "9eb03bb1c035ff6e2c3a34046419446588253dda",
              "lessThan": "a7e023c63e855761c1426cee8d17c2bca32aa339",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "9eb03bb1c035ff6e2c3a34046419446588253dda",
              "lessThan": "ecebfdaab72a504c10f4907bd00fc3b705ec3b12",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "9eb03bb1c035ff6e2c3a34046419446588253dda",
              "lessThan": "f1986bf87b0709c95126fe196cf39e5b8c8453a1",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.8"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "6.8",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.12.111",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.53",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.2.7",
              "versionType": "semver",
              "lessThanOrEqual": "7.2.*"
            },
            {
              "status": "unaffected",
              "version": "7.3-rc3",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-09-25T11:17:31.560",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/82812583b9c69c241da6da4186f14e9df2516488",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/a7e023c63e855761c1426cee8d17c2bca32aa339",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/ecebfdaab72a504c10f4907bd00fc3b705ec3b12",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/f1986bf87b0709c95126fe196cf39e5b8c8453a1",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\neth: nfp: bound the ntuple rule dump by the caller's buffer size\n\nnfp_net_get_fs_loc() dumps every entry of nn->fs.list into rule_locs[]\nwithout consulting cmd->rule_cnt, which is how many entries the caller\nhad room for.  ETHTOOL_GRXCLSRLALL requires no CAP_NET_ADMIN and the\nioctl sizes the buffer from the rule_cnt userspace passes in, so once an\nadmin has installed flow steering rules any user can ask for fewer slots\nthan there are rules and run off the end of the allocation.  A rule_cnt\nof 0 leaves the buffer pointer NULL and the walk dereferences it.\n\nBail out with -EMSGSIZE when the buffer fills up, the way the other\nntuple capable drivers do, and report how many locations were filled so\na shrinking rule list does not leave the caller reading stale slots."
    }
  ],
  "lastModified": "2026-09-25T15:18:04.500",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}