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CVE-2025-71115

Estado: AnalizadaMedia (5.5)—

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

um: init cpu_tasks[] earlier

This is currently done in uml_finishsetup(), but e.g. with KCOV enabled we'll crash because some init code can call into e.g. memparse(), which has coverage annotations, and then the checks in check_kcov_mode() crash because current is NULL.

Simply initialize the cpu_tasks[] array statically, which fixes the crash. For the later SMP work, it seems to have not really caused any problems yet, but initialize all of the entries anyway.

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).

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2025-71115",
  "cveTags": [],
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        "source": "nvd@nist.gov",
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          "version": "3.1",
          "baseScore": 5.5,
          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 1.8
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          "vendor": "Linux",
          "product": "Linux",
          "versions": [
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          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
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              "version": "6.13"
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              "status": "unaffected",
              "version": "0",
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              "version": "6.18.3",
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            {
              "status": "unaffected",
              "version": "6.19",
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          ],
          "programFiles": [
            "arch/um/kernel/process.c",
            "arch/um/kernel/um_arch.c"
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          "defaultStatus": "affected"
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      ]
    }
  ],
  "published": "2026-01-14T15:16:01.177",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/7b5d4416964c07c902163822a30a622111172b01",
      "tags": [
        "Patch"
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/dbbf6d47130674640cd12a0781a0fb2a575d0e44",
      "tags": [
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-908"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\num: init cpu_tasks[] earlier\n\nThis is currently done in uml_finishsetup(), but e.g. with\nKCOV enabled we'll crash because some init code can call\ninto e.g. memparse(), which has coverage annotations, and\nthen the checks in check_kcov_mode() crash because current\nis NULL.\n\nSimply initialize the cpu_tasks[] array statically, which\nfixes the crash. For the later SMP work, it seems to have\nnot really caused any problems yet, but initialize all of\nthe entries anyway."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\num: inicializar cpu_tasks[] antes\n\nEsto se hace actualmente en uml_finishsetup(), pero, por ejemplo, con KCOV habilitado nos bloquearemos porque algún código de inicialización puede llamar, por ejemplo, a memparse(), que tiene anotaciones de cobertura, y luego las comprobaciones en check_kcov_mode() fallan porque current es NULL.\n\nSimplemente inicializar el array cpu_tasks[] estáticamente, lo que soluciona el fallo. Para el trabajo SMP posterior, parece no haber causado realmente ningún problema todavía, pero inicializar todas las entradas de todos modos."
    }
  ],
  "lastModified": "2026-06-17T10:03:41.663",
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