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Vulnerability · Published Mar 16, 2022 · Assigned by google_android

CVE-2021-39685

High 7.8

In plain English

A high-severity security flaw in Android. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 40% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)7.8High
Exploit odds (30 days)0.5%top 59.9% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack tooling1Public PoC

Official description

In various setup methods of the USB gadget subsystem, there is a possible out of bounds write due to an incorrect flag check. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-210292376References: Upstream kernel

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux5.15.5-2DEBIAN-CVE-2021-39685
Debian:13linux5.15.5-2DEBIAN-CVE-2021-39685
Debian:14linux5.15.5-2DEBIAN-CVE-2021-39685
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2021-39685
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2021-39685
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2021-39685

Affected products (as reported)

VendorProductVersions
n/a Android Android kernel

References