fkie_cve-2024-35987
Vulnerability from fkie_nvd
Published
2024-05-20 10:15
Modified
2025-09-24 18:16
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: riscv: Fix loading 64-bit NOMMU kernels past the start of RAM commit 3335068f8721 ("riscv: Use PUD/P4D/PGD pages for the linear mapping") added logic to allow using RAM below the kernel load address. However, this does not work for NOMMU, where PAGE_OFFSET is fixed to the kernel load address. Since that range of memory corresponds to PFNs below ARCH_PFN_OFFSET, mm initialization runs off the beginning of mem_map and corrupts adjacent kernel memory. Fix this by restoring the previous behavior for NOMMU kernels.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/aea702dde7e9876fb00571a2602f25130847bf0fPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b008e327fa570aca210f98c817757649bae56694Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ea6628e4e2353978af7e3b4ad4fdaab6149acf3dPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/aea702dde7e9876fb00571a2602f25130847bf0fPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/b008e327fa570aca210f98c817757649bae56694Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/ea6628e4e2353978af7e3b4ad4fdaab6149acf3dPatch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 6.9
linux linux_kernel 6.9
linux linux_kernel 6.9
linux linux_kernel 6.9
linux linux_kernel 6.9


To clipboard 

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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nriscv: Fix loading 64-bit NOMMU kernels past the start of RAM\n\ncommit 3335068f8721 (\"riscv: Use PUD/P4D/PGD pages for the linear\nmapping\") added logic to allow using RAM below the kernel load address.\nHowever, this does not work for NOMMU, where PAGE_OFFSET is fixed to the\nkernel load address. Since that range of memory corresponds to PFNs\nbelow ARCH_PFN_OFFSET, mm initialization runs off the beginning of\nmem_map and corrupts adjacent kernel memory. Fix this by restoring the\nprevious behavior for NOMMU kernels."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: riscv: se corrigi\u00f3 la carga de kernels NOMMU de 64 bits despu\u00e9s del inicio de la confirmaci\u00f3n de RAM. 3335068f8721 (\"riscv: use p\u00e1ginas PUD/P4D/PGD para el mapeo lineal\") se agreg\u00f3 l\u00f3gica para permitir el uso RAM debajo de la direcci\u00f3n de carga del kernel. Sin embargo, esto no funciona para NOMMU, donde PAGE_OFFSET est\u00e1 fijado a la direcci\u00f3n de carga del kernel. Dado que ese rango de memoria corresponde a los PFN por debajo de ARCH_PFN_OFFSET, la inicializaci\u00f3n de mm se ejecuta desde el principio de mem_map y corrompe la memoria del kernel adyacente. Solucione este problema restaurando el comportamiento anterior de los n\u00facleos NOMMU."
    }
  ],
  "id": "CVE-2024-35987",
  "lastModified": "2025-09-24T18:16:30.880",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2024-05-20T10:15:13.057",
  "references": [
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
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      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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