nvd-json-data-feeds/CVE-2024/CVE-2024-422xx/CVE-2024-42233.json

{
  "id": "CVE-2024-42233",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2024-08-07T16:15:46.313",
  "lastModified": "2024-08-08T14:56:18.620",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfilemap: replace pte_offset_map() with pte_offset_map_nolock()\n\nThe vmf->ptl in filemap_fault_recheck_pte_none() is still set from\nhandle_pte_fault().  But at the same time, we did a pte_unmap(vmf->pte). \nAfter a pte_unmap(vmf->pte) unmap and rcu_read_unlock(), the page table\nmay be racily changed and vmf->ptl maybe fails to protect the actual page\ntable.  Fix this by replacing pte_offset_map() with\npte_offset_map_nolock().\n\nAs David said, the PTL pointer might be stale so if we continue to use\nit infilemap_fault_recheck_pte_none(), it might trigger UAF.  Also, if\nthe PTL fails, the issue fixed by commit 58f327f2ce80 (\"filemap: avoid\nunnecessary major faults in filemap_fault()\") might reappear."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: filemap: reemplace pte_offset_map() con pte_offset_map_nolock() El vmf->ptl en filemap_fault_recheck_pte_none() todav\u00eda est\u00e1 configurado desde handle_pte_fault(). Pero al mismo tiempo, hicimos un pte_unmap(vmf->pte). Despu\u00e9s de desasignar pte_unmap(vmf->pte) y rcu_read_unlock(), la tabla de p\u00e1ginas puede cambiarse r\u00e1pidamente y vmf->ptl tal vez no pueda proteger la tabla de p\u00e1ginas real. Solucione este problema reemplazando pte_offset_map() con pte_offset_map_nolock(). Como dijo David, el puntero PTL puede estar obsoleto, por lo que si continuamos us\u00e1ndolo en filemap_fault_recheck_pte_none(), podr\u00eda activar UAF. Adem\u00e1s, si el PTL falla, el problema solucionado mediante el commit 58f327f2ce80 (\"filemap: evite errores importantes innecesarios en filemap_fault()\") podr\u00eda reaparecer."
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "nvd@nist.gov",
        "type": "Primary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N",
          "attackVector": "LOCAL",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "LOW",
          "availabilityImpact": "NONE",
          "baseScore": 3.3,
          "baseSeverity": "LOW"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 1.4
      }
    ]
  },
  "weaknesses": [
    {
      "source": "nvd@nist.gov",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
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    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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              "versionEndExcluding": "6.9.10",
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  "references": [
    {
      "url": "https://git.kernel.org/stable/c/24be02a42181f0707be0498045c4c4b13273b16d",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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    {
      "url": "https://git.kernel.org/stable/c/6a6c2aec1a89506595801b4cf7e8eef035f33748",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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}