fkie_cve-2022-48636
Vulnerability from fkie_nvd
Published
2024-04-28 13:15
Modified
2025-03-21 18:26
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: s390/dasd: fix Oops in dasd_alias_get_start_dev due to missing pavgroup Fix Oops in dasd_alias_get_start_dev() function caused by the pavgroup pointer being NULL. The pavgroup pointer is checked on the entrance of the function but without the lcu->lock being held. Therefore there is a race window between dasd_alias_get_start_dev() and _lcu_update() which sets pavgroup to NULL with the lcu->lock held. Fix by checking the pavgroup pointer with lcu->lock held.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2e473351400e3dd66f0b71eddcef82ee45a584c1Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/49f401a98b318761ca2e15d4c7869a20043fbed4Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/650a2e79d176db753654d3dde88e53a2033036acPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/aaba5ff2742043705bc4c02fd0b2b246e2e16da1Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d3a67c21b18f33c79382084af556557c442f12a6Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d86b4267834e6d4af62e3073e48166e349ab1b70Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/db7ba07108a48c0f95b74fabbfd5d63e924f992dPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f5fcc9d6d71d9ff7fdbdd4b89074e6e24fffc20bPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/2e473351400e3dd66f0b71eddcef82ee45a584c1Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/49f401a98b318761ca2e15d4c7869a20043fbed4Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/650a2e79d176db753654d3dde88e53a2033036acPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/aaba5ff2742043705bc4c02fd0b2b246e2e16da1Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/d3a67c21b18f33c79382084af556557c442f12a6Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/d86b4267834e6d4af62e3073e48166e349ab1b70Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/db7ba07108a48c0f95b74fabbfd5d63e924f992dPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/f5fcc9d6d71d9ff7fdbdd4b89074e6e24fffc20bPatch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 6.0
linux linux_kernel 6.0
linux linux_kernel 6.0
linux linux_kernel 6.0
linux linux_kernel 6.0
linux linux_kernel 6.0


To clipboard 

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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ns390/dasd: fix Oops in dasd_alias_get_start_dev due to missing pavgroup\n\nFix Oops in dasd_alias_get_start_dev() function caused by the pavgroup\npointer being NULL.\n\nThe pavgroup pointer is checked on the entrance of the function but\nwithout the lcu-\u003elock being held. Therefore there is a race window\nbetween dasd_alias_get_start_dev() and _lcu_update() which sets\npavgroup to NULL with the lcu-\u003elock held.\n\nFix by checking the pavgroup pointer with lcu-\u003elock held."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: s390/dasd: corrige Ups en dasd_alias_get_start_dev debido a la falta de pavgroup. Corrige Ups en la funci\u00f3n dasd_alias_get_start_dev() causada porque el puntero pavgroup es NULL. El puntero pavgroup se verifica en la entrada de la funci\u00f3n pero sin que se mantenga presionado el bloqueo lcu-\u0026gt;. Por lo tanto, existe una ventana de ejecuci\u00f3n entre dasd_alias_get_start_dev() y _lcu_update() que establece pavgroup en NULL con el bloqueo lcu-\u0026gt;retenido. Para solucionarlo, compruebe el puntero de pavgroup con lcu-\u0026gt;lock retenido."
    }
  ],
  "id": "CVE-2022-48636",
  "lastModified": "2025-03-21T18:26:19.630",
  "metrics": {
    "cvssMetricV31": [
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          "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"
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        "impactScore": 3.6,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
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  "published": "2024-04-28T13:15:06.710",
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  "vulnStatus": "Analyzed",
  "weaknesses": [
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          "value": "CWE-476"
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      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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}


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