CVE-2021-0920

MEDIUM6.4

In unix_scm_to_skb of af_unix

Published Dec 15, 2021

Modified 3 months ago

Details

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

References

WEBhttps://lists.debian.org/debian-lts-announce/2021/12/msg00012.html WEBhttps://source.android.com/security/bulletin/2021-11-01 WEBhttps://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-0920 ADVISORYhttps://www.cve.org/CVERecord?id=CVE-2021-0920

CVSS Analysis

CVSS v3.1

6.4

Exploitability

Attack Vector

LocalAV:L

Attack Complexity

HighAC:H

Privileges Required

HighPR:H

User Interaction

NoneUI:N

Scope

UnchangedS:U

Impact

Confidentiality

HighC:H

Integrity

HighI:H

Availability

HighA:H

6.4/CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

Ecosystems

Timeline

PublishedDec 15, 2021

ModifiedOct 21, 2025