Security features bypass in Pixel - CVE-2021-39713
Published: May 18, 2022
Vulnerability identifier: #VU63350
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-2021-39713
CWE-ID: CWE-254
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Google
Affected software:
Pixel
Pixel
Detailed vulnerability description
The vulnerability allows a local application to escalate privileges on the system.
The vulnerability exists due to multiple issues in Qdisc implementation related to rcu read lock. A local application can execute arbitrary code with elevated privileges.
How to mitigate CVE-2021-39713
Install updates from vendor's website.
Sources
- https://source.android.com/security/bulletin/pixel/2022-03-01
- https://android.googlesource.com/kernel/common/+/9d7e82cec35c0
- https://android.googlesource.com/kernel/common/+/3a7d0d07a3867
- https://android.googlesource.com/kernel/common/+/86bd446b5cebd
- https://android.googlesource.com/kernel/common/+/6f99528e97977
- https://android.googlesource.com/kernel/common/+/e368fdb61d8e7