CVE-2021-0920

MEDIUM KEV

Android kernel - Use After Free

Title source: llm

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

References (3)

[Mailing List, Third Party Advisory] https://lists.debian.org/debian-lts-announce/2021/12/msg00012.html

[Vendor Advisory] https://source.android.com/security/bulletin/2021-11-01

[Third Party Advisory, US Government Resource] https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-0920

Scores

CVSS v3 6.4

EPSS 0.0091

EPSS Percentile 75.8%

Attack Vector LOCAL

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

Details

CISA KEV 2022-05-23

VulnCheck KEV 2021-11-05

InTheWild.io 2021-11-05

ENISA EUVD EUVD-2021-3539

CWE

CWE-362 CWE-416

Status published

Products (4)

debian/debian_linux 9.0

google/android

linux/linux_kernel 5.14 rc1 (3 CPE variants)

linux/linux_kernel < 5.13

Published Dec 15, 2021

KEV Added May 23, 2022

Tracked Since Feb 18, 2026