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CVE-2026-72181

Estado: RecibidaAlta (7.8)—

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

mips: sched: Fix CPUMASK_OFFSTACK memory corruption

This patch addresses a critical memory management flaw. When CONFIG_CPUMASK_OFFSTACK is enabled, cpumask_var_t is a pointer. Consequently, sizeof(new_mask) evaluates to the pointer size, causing copy_from_user() to clobber the mask pointer. Furthermore, the old logic performed copy_from_user() before allocating the mask.

Fix this by allocating new_mask first. To handle variable-sized user masks correctly, use cpumask_size() to truncate overly large user masks or pad undersized masks with zeros before copying the data directly into the allocated buffer.

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 (AV:L, PR:L) sin interacción del usuario que corrompe memoria en el kernel Linux mediante copy_from_user(), permitiendo escalada de privilegios y manipulación de datos del sistema.

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 ProgramRestrict File and Directory PermissionsRemote Data StorageFilter Network TrafficExecution PreventionEncrypt Sensitive Information

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-2026-72181",
  "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": [
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              "status": "affected",
              "version": "295cbf6d63165fe4253cf1d9ceadcda47a318b48",
              "lessThan": "2f7730c03a9deea3ba7a1c980070d363b4ea2046",
              "versionType": "git"
            },
            {
              "status": "affected",
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              "lessThan": "d20ee42f8226607b5693b2bc2f115ca2d270221a",
              "versionType": "git"
            },
            {
              "status": "affected",
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              "lessThan": "15ba8053fe4162c933855f1676fb321cdb6251c7",
              "versionType": "git"
            },
            {
              "status": "affected",
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              "versionType": "git"
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            {
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              "versionType": "git"
            },
            {
              "status": "affected",
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              "lessThan": "1caee6e084a96ada94658f261ced377d85af3f03",
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              "versionType": "git"
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          ],
          "programFiles": [
            "arch/mips/kernel/mips-mt-fpaff.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.23"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "2.6.23",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "5.10.265",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "status": "unaffected",
              "version": "5.15.212",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "status": "unaffected",
              "version": "6.1.178",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.6.145",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.12.97",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.40",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.1.5",
              "versionType": "semver",
              "lessThanOrEqual": "7.1.*"
            },
            {
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "arch/mips/kernel/mips-mt-fpaff.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-08-15T06:21:36.393",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/15ba8053fe4162c933855f1676fb321cdb6251c7",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/1caee6e084a96ada94658f261ced377d85af3f03",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/2f7730c03a9deea3ba7a1c980070d363b4ea2046",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/3446ffb5d03c36f9ce88ede7ca5be319a2968d96",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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      "url": "https://git.kernel.org/stable/c/87a56c1e8e36d06ebe8640432f911538ded7827d",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/98e37db4a34d3af3fb2f4648295c25b5e40b20e3",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/a1dd41d00c57efb1fbc6f361c5f48c9d00cca51c",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/d20ee42f8226607b5693b2bc2f115ca2d270221a",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmips: sched: Fix CPUMASK_OFFSTACK memory corruption\n\nThis patch addresses a critical memory management flaw. When\nCONFIG_CPUMASK_OFFSTACK is enabled, cpumask_var_t is a pointer.\nConsequently, sizeof(new_mask) evaluates to the pointer size, causing\ncopy_from_user() to clobber the mask pointer. Furthermore, the old\nlogic performed copy_from_user() before allocating the mask.\n\nFix this by allocating new_mask first. To handle variable-sized user\nmasks correctly, use cpumask_size() to truncate overly large user masks\nor pad undersized masks with zeros before copying the data directly into\nthe allocated buffer."
    }
  ],
  "lastModified": "2026-08-19T17:21:00.547",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}