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VULNERABILITIES

CVE-2021-0920 Details

Description

In unix_scm_to_skb of af_unix.c, there is a possible use after free bug due to a race condition. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-196926917References: Upstream kernel

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:6.4 MEDIUMVector:CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
CNA: CISA-ADPCVSS-B:6.4 MEDIUMVector:CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.

URLSource(s)Tag(s)
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-0920 CISA-ADPThird Party AdvisoryUS Government Resource
https://lists.debian.org/debian-lts-announce/2021/12/msg00012.html CVEMailing ListThird Party Advisory
https://source.android.com/security/bulletin/2021-11-01 CVEVendor Advisory
https://lists.debian.org/debian-lts-announce/2021/12/msg00012.html [email protected]Mailing ListThird Party Advisory
https://source.android.com/security/bulletin/2021-11-01 [email protected]Vendor Advisory

This CVE is in CISA's Known Exploited Vulnerabilities Catalog

Reference CISA's BOD 22-01 and Known Exploited Vulnerabilities Catalog for further guidance and requirements.

Vulnerability NameDate AddedDue DateRequired Action
Android Kernel Race Condition VulnerabilityMay 23, 2022Jun 13, 2022Apply updates per vendor instructions.

Weakness Enumeration

CWE-IDCWE NameSource
CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')[email protected]
CWE-416Use After Free[email protected]
CWE-416Use After FreeCISA-ADP

Affected Products

ProductVersions
linux linux kernel
<= 5.13
5.14 rc1
5.14 rc2
5.14 rc3

CPE

  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.14:rc1:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.14:rc2:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:5.14:rc3:*:*:*:*:*:*

Remediation

  • No remediation found in references.
google android
All versions

CPE

  • cpe:2.3:o:google:android:-:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.
debian debian linux
9.0

CPE

  • cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

14 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2021-0920
NVD Published Date:
Dec 15, 2021
NVD Last Modified:
Jun 17, 2026
Source:
[email protected]
CVE-2021-0920 Details - Not Deferred