fkie_cve-2024-41055
Vulnerability from fkie_nvd
Published
2024-07-29 15:15
Modified
2024-11-21 09:32
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: mm: prevent derefencing NULL ptr in pfn_section_valid() Commit 5ec8e8ea8b77 ("mm/sparsemem: fix race in accessing memory_section->usage") changed pfn_section_valid() to add a READ_ONCE() call around "ms->usage" to fix a race with section_deactivate() where ms->usage can be cleared. The READ_ONCE() call, by itself, is not enough to prevent NULL pointer dereference. We need to check its value before dereferencing it.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0100aeb8a12d51950418e685f879cc80cb8e5982Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/797323d1cf92d09b7a017cfec576d9babf99cde7Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/82f0b6f041fad768c28b4ad05a683065412c226ePatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/941e816185661bf2b44b488565d09444ae316509Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/adccdf702b4ea913ded5ff512239e382d7473b63Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/bc17f2377818dca643a74499c3f5333500c90503Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/0100aeb8a12d51950418e685f879cc80cb8e5982Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/797323d1cf92d09b7a017cfec576d9babf99cde7Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/82f0b6f041fad768c28b4ad05a683065412c226ePatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/941e816185661bf2b44b488565d09444ae316509Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/adccdf702b4ea913ded5ff512239e382d7473b63Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/bc17f2377818dca643a74499c3f5333500c90503Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *


To clipboard 

{
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm: prevent derefencing NULL ptr in pfn_section_valid()\n\nCommit 5ec8e8ea8b77 (\"mm/sparsemem: fix race in accessing\nmemory_section-\u003eusage\") changed pfn_section_valid() to add a READ_ONCE()\ncall around \"ms-\u003eusage\" to fix a race with section_deactivate() where\nms-\u003eusage can be cleared.  The READ_ONCE() call, by itself, is not enough\nto prevent NULL pointer dereference.  We need to check its value before\ndereferencing it."
    },
    {
      "lang": "es",
      "value": " En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: mm: evita la eliminaci\u00f3n de la referencia NULL ptr en pfn_section_valid() La confirmaci\u00f3n 5ec8e8ea8b77 (\"mm/sparsemem: corrige la ejecuci\u00f3n al acceder a la secci\u00f3n_memoria-\u0026gt;uso\") cambi\u00f3 pfn_section_valid() para agregar un READ_ONCE() llame a \"ms-\u0026gt;usage\" para arreglar una ejecuci\u00f3n con section_deactivate() donde se puede borrar ms-\u0026gt;usage. La llamada READ_ONCE(), por s\u00ed sola, no es suficiente para evitar la desreferencia al puntero NULL. Necesitamos comprobar su valor antes de desreferenciarlo."
    }
  ],
  "id": "CVE-2024-41055",
  "lastModified": "2024-11-21T09:32:09.107",
  "metrics": {
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          "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"
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  "weaknesses": [
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          "value": "CWE-476"
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      "source": "nvd@nist.gov",
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  ]
}


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