CVE-2021-39656

Published on: 12/15/2021 12:00:00 AM UTC

Last Modified on: 12/20/2021 10:16:00 PM UTC

CVE-2021-39656

Source: Mitre Source: NIST CVE.ORG Print: PDF PDF
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Certain versions of Android from Google contain the following vulnerability:

In __configfs_open_file of file.c, there is a possible use-after-free due to improper locking. This could lead to local escalation of privilege in the kernel with System execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-174049066References: Upstream kernel

  • CVE-2021-39656 has been assigned by URL Logo secur[email protected] to track the vulnerability - currently rated as MEDIUM severity.

CVSS3 Score: 6.7 - MEDIUM

Attack
Vector ⓘ		 Attack
Complexity		 Privileges
Required		 User
Interaction
LOCAL LOW HIGH NONE
Scope Confidentiality
Impact		 Integrity
Impact		 Availability
Impact
UNCHANGED HIGH HIGH HIGH

CVSS2 Score: 4.6 - MEDIUM

Access
Vector ⓘ		 Access
Complexity		 Authentication
LOCAL LOW NONE
Confidentiality
Impact		 Integrity
Impact		 Availability
Impact
PARTIAL PARTIAL PARTIAL

CVE References

Description Tags ⓘ Link
Pixel Update Bulletin—December 2021  |  Android Open Source Project source.android.com
text/html
 URL Logo MISC source.android.com/security/bulletin/pixel/2021-12-01
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Related QID Numbers

  • 180344 Debian Security Update for linux (CVE-2021-39656)
  • 610384 Google Pixel Android December 2021 Security Patch Missing
  • 610392 Google Android January 2022 Security Patch Missing for Huawei EMUI
  • 671367 EulerOS Security Update for kernel (EulerOS-SA-2022-1308)
  • 671498 EulerOS Security Update for kernel (EulerOS-SA-2022-1466)

Known Affected Configurations (CPE V2.3)

Type Vendor Product Version Update Edition Language
Operating
System		GoogleAndroid-AllAllAll
  • cpe:2.3:o:google:android:-:*:*:*:*:*:*:*:

Social Mentions

Source Title Posted (UTC)
Twitter Icon @CVEreport CVE-2021-39656 : In __configfs_open_file of file.c, there is a possible use-after-free due to improper locking. Thi… twitter.com/i/web/status/1… 2021-12-15 19:30:10
Reddit Logo Icon /r/netcve CVE-2021-39656 2021-12-15 20:38:40
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