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CVE-2026-97421

Estado: RecibidaAlta (7.8)—

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

RDMA/umem: Be careful about boundary conditions in ib_umem_find_best_pgsz()

Several corner cases, especially important on 32 bits:

- umem->iova is u64, the function argument should pass in u64 or iova will be truncated - Check that the length is not too large for the iova - Check that lengths > 4G don't overflow the GENMASK

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 local de kernel en manejo de memoria RDMA con truncamiento de valores u64 y desbordamiento en GENMASK; permite escalada de privilegios. AV:L/PR:L confirma acceso local. Impactos: ejecución de código kernel y lectura 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

Execution PreventionThreat Intelligence ProgramRestrict Web-Based ContentBehavior Prevention on EndpointDisable or Remove Feature or ProgramApplication 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 KernelAI

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2026-97421",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.8,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 1.8
      }
    ]
  },
  "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": "a40c20dabdf9045270767c75918feb67f0727c89",
              "lessThan": "3014da7587ce006cd08004fd6b257626b314e0a3",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "a40c20dabdf9045270767c75918feb67f0727c89",
              "lessThan": "ddccf6cc3861de2fe60986933bead79220e0d797",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "a40c20dabdf9045270767c75918feb67f0727c89",
              "lessThan": "e9bbb5f5349ef560ff6f0395564f04c3aa664559",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "a40c20dabdf9045270767c75918feb67f0727c89",
              "lessThan": "ae3cf7d2c4d506c5c91746321644e1a08d989e2a",
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            },
            {
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            {
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            },
            {
              "status": "affected",
              "version": "59f07434b297e2268f5d5c567db5b09145245cf1",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "488229b7729d7becf4c39c5e74fb709fb35115c2",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "5.4.73",
              "lessThan": "5.5",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "5.8.17",
              "lessThan": "5.9",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "5.9.2",
              "lessThan": "5.10",
              "versionType": "semver"
            }
          ],
          "programFiles": [
            "drivers/infiniband/core/umem.c",
            "include/rdma/ib_umem.h"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.10"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "5.10",
              "versionType": "semver"
            },
            {
              "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": "6.12.111",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.53",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/infiniband/core/umem.c",
            "include/rdma/ib_umem.h"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-09-24T17:17:19.993",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/09ea6837a0434fb4db99528a5055b6d822135dcf",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/3014da7587ce006cd08004fd6b257626b314e0a3",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/5fc5b73109540809b094710fac44da81dd8a3ff8",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/ae3cf7d2c4d506c5c91746321644e1a08d989e2a",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/ddccf6cc3861de2fe60986933bead79220e0d797",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/e9bbb5f5349ef560ff6f0395564f04c3aa664559",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/umem: Be careful about boundary conditions in ib_umem_find_best_pgsz()\n\nSeveral corner cases, especially important on 32 bits:\n\n- umem->iova is u64, the function argument should pass in u64 or\n  iova will be truncated\n- Check that the length is not too large for the iova\n- Check that lengths > 4G don't overflow the GENMASK"
    }
  ],
  "lastModified": "2026-10-03T11:17:54.257",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}