fkie_cve-2022-48996
Vulnerability from fkie_nvd
Published
2024-10-21 20:15
Modified
2024-11-07 19:37
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/damon/sysfs: fix wrong empty schemes assumption under online tuning in damon_sysfs_set_schemes() Commit da87878010e5 ("mm/damon/sysfs: support online inputs update") made 'damon_sysfs_set_schemes()' to be called for running DAMON context, which could have schemes. In the case, DAMON sysfs interface is supposed to update, remove, or add schemes to reflect the sysfs files. However, the code is assuming the DAMON context wouldn't have schemes at all, and therefore creates and adds new schemes. As a result, the code doesn't work as intended for online schemes tuning and could have more than expected memory footprint. The schemes are all in the DAMON context, so it doesn't leak the memory, though. Remove the wrong asssumption (the DAMON context wouldn't have schemes) in 'damon_sysfs_set_schemes()' to fix the bug.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/95bc35f9bee5220dad4e8567654ab3288a181639Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f98d1f2a36ad7ab48fb4cf73ca14e7b19482fd4dPatch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel 6.1
linux linux_kernel 6.1
linux linux_kernel 6.1
linux linux_kernel 6.1
linux linux_kernel 6.1
linux linux_kernel 6.1
linux linux_kernel 6.1


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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/damon/sysfs: fix wrong empty schemes assumption under online tuning in damon_sysfs_set_schemes()\n\nCommit da87878010e5 (\"mm/damon/sysfs: support online inputs update\") made\n\u0027damon_sysfs_set_schemes()\u0027 to be called for running DAMON context, which\ncould have schemes.  In the case, DAMON sysfs interface is supposed to\nupdate, remove, or add schemes to reflect the sysfs files.  However, the\ncode is assuming the DAMON context wouldn\u0027t have schemes at all, and\ntherefore creates and adds new schemes.  As a result, the code doesn\u0027t\nwork as intended for online schemes tuning and could have more than\nexpected memory footprint.  The schemes are all in the DAMON context, so\nit doesn\u0027t leak the memory, though.\n\nRemove the wrong asssumption (the DAMON context wouldn\u0027t have schemes) in\n\u0027damon_sysfs_set_schemes()\u0027 to fix the bug."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: mm/damon/sysfs: se corrige la suposici\u00f3n incorrecta de esquemas vac\u00edos durante el ajuste en l\u00ednea en damon_sysfs_set_schemes(). el commit da87878010e5 (\"mm/damon/sysfs: soporte para la actualizaci\u00f3n de entradas en l\u00ednea\") hizo que se llamara a \u0027damon_sysfs_set_schemes()\u0027 para ejecutar el contexto DAMON, que podr\u00eda tener esquemas. En este caso, se supone que la interfaz sysfs de DAMON actualiza, elimina o agrega esquemas para reflejar los archivos sysfs. Sin embargo, el c\u00f3digo asume que el contexto DAMON no tendr\u00eda esquemas en absoluto y, por lo tanto, crea y agrega nuevos esquemas. Como resultado, el c\u00f3digo no funciona como se esperaba para el ajuste de esquemas en l\u00ednea y podr\u00eda tener una huella de memoria mayor a la esperada. Todos los esquemas est\u00e1n en el contexto DAMON, por lo que no pierde memoria. Elimine la suposici\u00f3n incorrecta (el contexto DAMON no tendr\u00eda esquemas) en \u0027damon_sysfs_set_schemes()\u0027 para corregir el error."
    }
  ],
  "id": "CVE-2022-48996",
  "lastModified": "2024-11-07T19:37:27.663",
  "metrics": {
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        "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"
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        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
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  "published": "2024-10-21T20:15:11.423",
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  "vulnStatus": "Analyzed",
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          "value": "NVD-CWE-noinfo"
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      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
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  ]
}


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