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FKIE_CVE-2020-25669

Vulnerability from fkie_nvd - Published: 2021-05-26 12:15 - Updated: 2026-06-17 03:07
Severity
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
A vulnerability was found in the Linux Kernel where the function sunkbd_reinit having been scheduled by sunkbd_interrupt before sunkbd being freed. Though the dangling pointer is set to NULL in sunkbd_disconnect, there is still an alias in sunkbd_reinit causing Use After Free.
References
secalert@redhat.comhttp://www.openwall.com/lists/oss-security/2020/11/05/2Exploit, Mailing List, Third Party Advisory
secalert@redhat.comhttp://www.openwall.com/lists/oss-security/2020/11/20/5Exploit, Mailing List, Third Party Advisory
secalert@redhat.comhttps://github.com/torvalds/linux/commit/77e70d351db7de07a46ac49b87a6c3c7a60fca7ePatch, Third Party Advisory
secalert@redhat.comhttps://lists.debian.org/debian-lts-announce/2020/12/msg00015.htmlMailing List, Third Party Advisory
secalert@redhat.comhttps://lists.debian.org/debian-lts-announce/2020/12/msg00027.htmlMailing List, Third Party Advisory
secalert@redhat.comhttps://security.netapp.com/advisory/ntap-20210702-0006/Third Party Advisory
secalert@redhat.comhttps://www.openwall.com/lists/oss-security/2020/11/05/2%2C
secalert@redhat.comhttps://www.openwall.com/lists/oss-security/2020/11/20/5%2C
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2020/11/05/2Exploit, Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2020/11/20/5Exploit, Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/torvalds/linux/commit/77e70d351db7de07a46ac49b87a6c3c7a60fca7ePatch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2020/12/msg00015.htmlMailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2020/12/msg00027.htmlMailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://security.netapp.com/advisory/ntap-20210702-0006/Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.openwall.com/lists/oss-security/2020/11/05/2%2C
af854a3a-2127-422b-91ae-364da2661108https://www.openwall.com/lists/oss-security/2020/11/20/5%2C
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
debian debian_linux 9.0
netapp cloud_backup -
netapp solidfire_\&_hci_management_node -
netapp solidfire_baseboard_management_controller -
netapp h300s_firmware -
netapp h300s -
netapp h500s_firmware -
netapp h500s -
netapp h700s_firmware -
netapp h700s -
netapp h300e_firmware -
netapp h300e -
netapp h500e_firmware -
netapp h500e -
netapp h700e_firmware -
netapp h700e -
netapp h410s_firmware -
netapp h410s -
netapp h410c_firmware -
netapp h410c -
To clipboard 

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  "cveTags": [],
  "descriptions": [
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      "lang": "en",
      "value": "A vulnerability was found in the Linux Kernel where the function sunkbd_reinit having been scheduled by sunkbd_interrupt before sunkbd being freed. Though the dangling pointer is set to NULL in sunkbd_disconnect, there is still an alias in sunkbd_reinit causing Use After Free."
    },
    {
      "lang": "es",
      "value": "Se encontr\u00f3 una vulnerabilidad en el Kernel de Linux donde la funci\u00f3n sunkbd_reinit habiendo sido programada por la funci\u00f3n sunkbd_interrupt antes de que sunkbd fuera liberada.\u0026#xa0;Aunque el puntero colgante est\u00e1 establecido en NULL en la funci\u00f3n sunkbd_disconnect, todav\u00eda se presenta un alias en sunkbd_reinit causando un Uso de la Memoria Previamente Liberada"
    }
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  "id": "CVE-2020-25669",
  "lastModified": "2026-06-17T03:07:05.740",
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  "published": "2021-05-26T12:15:15.743",
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}



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Tags
Taxonomy of the tags.





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

Author Source Type Date Other

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.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • 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.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.