CVE-2021-0920
Published 2021-12-15 · Updated 2026-06-17 · Source security@android.com
Summary
CVE-2021-0920 is a medium-severity (CVSS 6.4) vulnerability in Android Kernel. CISA added it to the Known Exploited Vulnerabilities catalog on May 23, 2022, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by June 13, 2022. CISA does not currently list it as used in ransomware campaigns. Android has 17 vulnerabilities in the KEV catalog, 0 of them linked to ransomware.
All 17 known-exploited Android vulnerabilities →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
CVSS vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
CISA Known-Exploited Vulnerability
Product: Android — Kernel
Name: Android Kernel Race Condition Vulnerability
Date added: 2022-05-23 · Due: 2022-06-13
Required action: Apply updates per vendor instructions.
References
- https://lists.debian.org/debian-lts-announce/2021/12/msg00012.html
- https://source.android.com/security/bulletin/2021-11-01
- https://lists.debian.org/debian-lts-announce/2021/12/msg00012.html
- https://source.android.com/security/bulletin/2021-11-01
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-0920