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Full vulnerability report · 2022
CVE-2021-39660High confidence

This could lead to local escalation of privilege with no additional execution privileges needed

n/a · Android

7.0HighCVSS 3.1
Recommended action
Within 7 days

High technical severity; prioritise exposed affected systems while verifying vendor guidance.

Fix not verified
Optional official sources

National CERT insights
?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

Select the national-authority views to include. The exact source language is shown on each matched advisory. Your choice is remembered on this device and encoded in the shareable URL.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2021-26017

No EUVD known-exploited evidence

ENISA has published the identifier mapping but no EUVD description has been stored yet.

EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
Not supplied in the stored EUVD record
Advisory evidence
No linked advisory details stored yet
Recommended actionWithin 7 days

High technical severity; prioritise exposed affected systems while verifying vendor guidance.

Fix not verified
01

What, why and how

In TBD of TBD, there is a possible way to archive arbitrary code execution in kernel due to a race condition. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android SoCAndroid ID: A-254742984

What

In TBD of TBD, there is a possible way to archive arbitrary code execution in kernel due to a race condition. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android SoCAndroid ID: A-254742984

Why

The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.

How

An attacker operating through local access may attempt exploitation with low privileges. If successful, the issue may execute code or commands in the affected security context.

What

In TBD of TBD, there is a possible way to archive arbitrary code execution in kernel due to a race condition. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android SoCAndroid ID: A-254742984

Why

The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.

How

An attacker operating through local access may attempt exploitation with low privileges. If successful, the issue may execute code or commands in the affected security context.

02

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path
local access → Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') → execute code or commands in the affected security context
Attack surface
Local
Privileges required
Low: a basic authenticated account is required
User interaction
None
Attack complexity
High: exploitation depends on specific conditions
Security boundary
Unchanged: impact remains within the vulnerable component's security authority
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-362 ↗

CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition'). The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.

AVLocalAttack vector: The attacker needs local access to the vulnerable system.ACHighAttack complexity: Successful exploitation depends on specific conditions outside the attacker's direct control.PRLowPrivileges required: The attacker needs basic user-level privileges.UINoneUser interaction: No action by another user is required.SUnchangedScope: The security impact remains within the vulnerable component's authority.CHighConfidentiality impact: A successful attack can cause a major loss.IHighIntegrity impact: A successful attack can cause a major loss.AHighAvailability impact: A successful attack can cause a major loss.
Post-exploitation / living off the land
After compromise, an attacker may use built-in shells, scripting engines, scheduled tasks and native network utilities for discovery, persistence or movement. This is a plausible LoTL path, not evidence that it has occurred for every attack.
Remote code executionCWE-362
A

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

BSI · German · WID-SEC-2022-2234Android Patchday Dezember 2022

Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Google Android ausnutzen, um seine Privilegien zu erweitern, einen Denial-of-Service-Zustand zu verursachen, beliebigen Code auszuführen und vertrauliche Informationen offenzulegen.

Official advisory ↗
Cyber Security Agency of Singapore · English · CSA-SB-20221214Security Bulletin 14 Dec 2022

The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 14 Dec 2022, published on 14 December 2022. Open the linked bulletin for the product, severity and reference information published in that issue.

Official advisory ↗
CERT-FR · French · CERTFR-2022-AVI-1084Multiples vulnérabilités dans Google Android

22 Résumé De multiples vulnérabilités ont été découvertes dans Google Android. Elles permettent à un attaquant de provoquer une exécution de code arbitraire à distance, un déni de service à distance et une atteinte à l'intégrité des données. Solution Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation). Documentation Bulletin de sécurité Android du 05 décembre 2022 https://source.android.com/docs/security/bulletin/2022-12-01 Référence CVE CVE-2021-0934 https://www.cve.org/CVERecord?id=CVE-2021-0934 Référence CVE CVE-2021-39617 https://www.cve.org/CVERecord?id=CVE-2021-39617 Référence CVE CVE-2021-39660 https://www.cve.org/CVERecord?id=CVE-2021-39660 Référence CVE CVE-2021-39795 https://www.cve.org/CVERecord?id=CVE-2021-39795 Référence CVE CVE-2022-20124 https://www.cve.org/CVERecord?id=CVE-2022-20124 Référence CVE CVE-2022-20144 https://www.cve.org/CVERecord?id=CVE-2022-20144 Référence CVE CVE-2022-20240 https://www.cve.org/CVERecord?id=CVE-2022-20240 Référence CVE CVE-2022-20411 https://www.cve.org/CVERecord?id=CVE-2022-20411 Référence CVE CVE-2022-20442 https://www.cve.org/CVERecord?id=CVE-2022-20442 Référence CVE CVE-2022-20444 https://www.cve.org/CVERecord?id=CVE-2022-20444 Référence CVE CVE-2022-20449 https://www.cve.org/CVERecord?id=

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2021-020587Google の Android における競合状態に関する脆弱性

Google の Android には、競合状態に関する脆弱性が存在します。

Official advisory ↗
KISA KrCERT/CC · Korean · KNVD-5796안드로이드OS 보안 업데이트 권고

#### 안드로이드OS 보안 업데이트 권고 2022.12.07 ##### □ 개요 o 구글社는 안드로이드의 취약점을 해결한 보안 업데이트 공지 o 낮은 버전을 사용 중인 OS 사용자는 최신 버전으로 업데이트 권고 ##### □ 설명 [1] o Android Runtime에서 발생하는 로컬 정보 공개 취약점 (CVE-2022-20502) o Android Framework에서 발생하는 원격 코드 실행 취약점 (CVE-2022-20472) 등 20개 o Android Media Framework에서 발생하는 로컬 정보 공개 취약점 (CVE-2022-20496) o Android 시스템에서 발생하는 원격 코드 실행 취약점 (CVE-2022-20411) 등 19개 o Android 커널에서 발생하는 로컬 정보 공개 취약점 (CVE-2022-23960) o Android의 Imagination Technologies 컴포넌트에서 발생하는 높은 심각도의 취약점 (CVE-2021-39660) o Android의 MediaTek 컴포넌트에서 발생하는 범위를 벗어난 쓰기 취약점 (CVE-2022-32594) 등 6개 o Android의 Unisoc 컴포넌트에서 발생하는 스택 버퍼 오버플로우 취약점 (CVE-2022-39106) 등 13개 o Android의 퀄컴 컴포넌트에서 발생하는 정보 공개 취약점 (CVE-2022-33268) o Android의 퀄컴 비공개 소스 컴포넌트에서 발생하는 서비스 거부 취약점 (CVE-2022-25672) 등 14개 ##### □ 영향받는 버전 확인 및 해결방안 o 취약점 별 영향받는 안드로이드 OS 버전 및 칩셋이 상이하므로 제조사 홈페이지 참고 [2] ##### □ 해결방안 o 제조사 홈페이지를 참고하여 최신버전으로 업데이트 [3] ##### □ 기타 문의사항 o 한국인터넷진흥원 사이버민원센터: 국번없이 118 [참고사이트] [1] https://source.android.com/docs/security/bulletin/2022-12-01 [2] https://source.android.com/security/bulletin [3] https://support.google.com/android/answer/7680439?hl=ko ##### □ 작성 : 침해사고분석단 취약점분석팀

Official advisory ↗
03

Patch and workaround

Operational remediation based on structured source evidence.

Status
?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Fix not verified
Affected
Android: Android SoC
Fixed
No fixed version is explicitly recorded in the structured CVE data.
Action
No verified patch reference is present in the current structured sources. Check the vendor advisory before making a change.
Workaround
No verified workaround is recorded. Limit untrusted access and use least privilege until authoritative guidance is available.
04

Evidence and provenance

Published 13 Dec 2022 · Last source change 22 Apr 2025, 19:54 UTC · CWE-362 · Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

CVE recordCVE.org · 5.1
CVSS sourceNIST NVD
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-08-14
European sourceENISA EUVD · EUVD-2021-26017
Product sourceCNA
Remediation sourceCVE/CNA references
CWE sourceCISA ADP
NVD statusNVD modified after enrichment

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates ↗

No material field changes have been recorded since change tracking began. Routine source refreshes and cosmetic edits are intentionally excluded.

Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
ENISA EUVD · EUVD-2021-26017↗CVE authority or vendor reference↗Official CVE record (CNA and ADP data)↗NVD record↗
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
Free version - for non-commercial use only.CVE-2021-39660 · cve.blacktree.nl