FKIE_CVE-2020-27825

Vulnerability from fkie_nvd - Published: 2020-12-11 19:15 - Updated: 2026-06-17 03:09
Severity
5.7 (Medium) - CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:H
Summary
A use-after-free flaw was found in kernel/trace/ring_buffer.c in Linux kernel (before 5.10-rc1). There was a race problem in trace_open and resize of cpu buffer running parallely on different cpus, may cause a denial of service problem (DOS). This flaw could even allow a local attacker with special user privilege to a kernel information leak threat.
References
secalert@redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=1905155Issue Tracking, Patch, Third Party Advisory
secalert@redhat.comhttps://lists.debian.org/debian-lts-announce/2021/02/msg00018.htmlMailing List, Third Party Advisory
secalert@redhat.comhttps://lists.debian.org/debian-lts-announce/2021/03/msg00010.htmlMailing List, Third Party Advisory
secalert@redhat.comhttps://security.netapp.com/advisory/ntap-20210521-0008/Third Party Advisory
secalert@redhat.comhttps://www.debian.org/security/2021/dsa-4843Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://bugzilla.redhat.com/show_bug.cgi?id=1905155Issue Tracking, Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2021/02/msg00018.htmlMailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2021/03/msg00010.htmlMailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://security.netapp.com/advisory/ntap-20210521-0008/Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.debian.org/security/2021/dsa-4843Third Party Advisory
Impacted products
Vendor Product Version
linux linux_kernel 5.10
redhat enterprise_linux 7.0
redhat enterprise_linux 8.0
redhat enterprise_mrg 2.0
debian debian_linux 9.0
debian debian_linux 10.0
netapp cloud_backup -
netapp solidfire_baseboard_management_controller_firmware -
netapp solidfire_baseboard_management_controller -
netapp h410c_firmware -
netapp h410c -
To clipboard 

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    },
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      "lang": "es",
      "value": "Se encontr\u00f3 un fallo de uso de la memoria previamente liberada en el archivo kernel/trace/ring_buffer.c en el kernel de Linux (anteriores a la versi\u00f3n 5.10-rc1). Se present\u00f3 un problema de carrera en trace_open y el cambio de tama\u00f1o del b\u00fafer de la CPU ejecut\u00e1ndose paralelamente en diferentes CPUs, puede causar un problema de Denegaci\u00f3n de Servicio (DOS). Este fallo podr\u00eda inclusive permitir a un atacante local con privilegios especiales de usuario amenazar con una filtraci\u00f3n de informaci\u00f3n del kernel"
    }
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  "id": "CVE-2020-27825",
  "lastModified": "2026-06-17T03:09:41.493",
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      "source": "secalert@redhat.com",
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}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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