PT-2021-1519 · Google+2 · Android Kernel+2

Published 2021-10-14 · Updated 2026-03-14 · CVE-2021-39686

Positive Technologies (AI Summary)

CVSS v3.1

7.0

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Android kernel

Description The issue is related to a race condition in several functions of binder.c, which could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not required for exploitation. This could allow an attacker to access confidential data, compromise its integrity, and cause a denial of service. The vulnerability is associated with insecure privilege management in the Linux kernel's binder.c component.

Recommendations For Android kernel, consider applying a patch to fix the insecure privilege management issue in binder.c as a permanent solution. As a temporary workaround, restrict access to the binder.c component to minimize the risk of exploitation.

Fix

Improper Privilege Management

Race Condition

Weakness Enumeration

CWE-269

CWE-362

Related Identifiers

ASB-A-200688826

BDU:2022-05972

CVE-2021-39686

DLA-2940-1

DLA-2941-1

DSA-5096-1

OESA-2022-1631

Affected Products

Android Kernel

Astra Linux

Debian

References · 43

• https://osv.dev/vulnerability/DLA-2941-1 · Vendor Advisory
• https://osv.dev/vulnerability/DLA-2940-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2022-1205 · Security Note
• https://osv.dev/vulnerability/ASB-A-200688826 · Vendor Advisory
• https://wiki.astralinux.ru/astra-linux-se16-bulletin-20220829SE16 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-39686 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2022-23037 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-39686 · Security Note
• https://ubuntu.com/security/CVE-2021-39686 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2022-23038 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2021-39686 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2022-23036 · Security Note
• https://source.android.com/security/bulletin/2022-03-01 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2022-0500 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-39686 · Vendor Advisory