Race condition in Google Android - CVE-2021-39686
Published: March 8, 2022
Vulnerability identifier: #VU61096
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2021-39686
CWE-ID: CWE-362
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Google
Affected software:
Google Android
Google Android
Detailed vulnerability description
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a race condition in the binder implementation in Linux kernel. A local user can exploit the race and gain unauthorized access to sensitive information and escalate privileges on the system.
How to mitigate CVE-2021-39686
Install updates from vendor's website.
Sources
- https://source.android.com/security/bulletin/2022-03-01#details-05
- https://android.googlesource.com/kernel/common/+/d49297739550
- https://android.googlesource.com/kernel/common/+/3af7a2f61023
- https://android.googlesource.com/kernel/common/+/11db2de0af2a
- https://android.googlesource.com/kernel/common/+/a4eacf3227bd