BlackTreeCVE Intelligence
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Full vulnerability report · 2021
CVE-2021-1924High confidence

Qualcomm, Inc. Snapdragon Auto, Snapdragon Compute, Snapdragon Connectivity, Snapdragon Consumer Electronics Connectivity, Snapdragon Consumer IOT, Snapdragon Industrial IOT, Snapdragon IoT, Snapdragon Voice & Music, Snapdragon Wearables, Snapdragon Wired Infrastructure and Networking — Observable Discrepancy

Qualcomm, Inc. · Snapdragon Auto, Snapdragon Compute, Snapdragon Connectivity, Snapdragon Consumer Electronics Connectivity, Snapdragon Consumer IOT, Snapdragon Industrial IOT, Snapdragon IoT, Snapdragon Voice & Music, Snapdragon Wearables, Snapdragon Wired Infrastructure and Networking

9.0CriticalCVSS 3.1
Recommended action
Within 7 days

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

Fix not verified
R
Operational reassessment

Published severity in operational context

Open reassessment dashboard →
Published severityCriticalOperational priority:Critical, unchanged from published severity.unchanged

Evidence used

  • No CISA KEV confirmation is currently recorded.
  • EPSS is 0.17% for the current model date.

Compensating controls

  • Restrict local access and enforce least privilege on affected hosts.
  • Monitor vendor guidance and exploitation sources for a material change.

Verification

  1. Confirm that the asset runs Qualcomm, Inc. Snapdragon Auto, Snapdragon Compute, Snapdragon Connectivity, Snapdragon Consumer Electronics Connectivity, Snapdragon Consumer IOT, Snapdragon Industrial IOT, Snapdragon IoT, Snapdragon Voice & Music, Snapdragon Wearables, Snapdragon Wired Infrastructure and Networking and falls inside the recorded affected range.
  2. Recheck the vendor advisory before scheduling a change because no verified fixed version is currently retained.
  3. Validate exposure, authentication requirements and compensating controls in the actual environment.
  4. Reopen this reassessment when CVSS, KEV, EPSS, exploit evidence or remediation changes.
Mitigation target: Within 3 daysRemediation target: Within 90 days

This automated reassessment organises public evidence. It does not know asset exposure, business impact or control effectiveness and does not replace CVSS or a human risk decision.

Optional official sources

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

Choose official national sources for this report. Each advisory shows its original language. Your selection is remembered on this device and included in shared links.

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-2021-7388

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

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

Fix not verified
01

What, why and how

Information disclosure through timing and power side-channels during mod exponentiation for RSA-CRT in Snapdragon Auto, Snapdragon Compute, Snapdragon Connectivity, Snapdragon Consumer Electronics Connectivity, Snapdragon Consumer IOT, Snapdragon Industrial IOT, Snapdragon IoT, Snapdragon Voice & Music, Snapdragon Wearables, Snapdragon Wired Infrastructure and Networking

What

Information disclosure through timing and power side-channels during mod exponentiation for RSA-CRT in Snapdragon Auto, Snapdragon Compute, Snapdragon Connectivity, Snapdragon Consumer Electronics Connectivity, Snapdragon Consumer IOT, Snapdragon Industrial IOT, Snapdragon IoT, Snapdragon Voice & Music, Snapdragon Wearables, Snapdragon Wired Infrastructure and Networking

Why

The product behaves differently or sends different responses under different circumstances in a way that is observable to an unauthorized actor.

How

An attacker operating through local access may attempt exploitation without authentication or user interaction. If successful, the issue may obtain information outside the intended access boundary.

What

Information disclosure through timing and power side-channels during mod exponentiation for RSA-CRT in Snapdragon Auto, Snapdragon Compute, Snapdragon Connectivity, Snapdragon Consumer Electronics Connectivity, Snapdragon Consumer IOT, Snapdragon Industrial IOT, Snapdragon IoT, Snapdragon Voice & Music, Snapdragon Wearables, Snapdragon Wired Infrastructure and Networking

Why

The product behaves differently or sends different responses under different circumstances in a way that is observable to an unauthorized actor.

How

An attacker operating through local access may attempt exploitation without authentication or user interaction. If successful, the issue may obtain information outside the intended access boundary.

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 → Observable Discrepancy → obtain information outside the intended access boundary
Attack surface
Local
Privileges required
None: unauthenticated exploitation is possible
User interaction
None
Attack complexity
Low: no specialised conditions are recorded
Security boundary
Changed: exploitation can affect a different security authority
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-203 ↗

CWE-203: Observable Discrepancy. The product behaves differently or sends different responses under different circumstances in a way that is observable to an unauthorized actor.

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:L/PR:N/UI:N/S:C/C:H/I:H/A:N

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.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRNonePrivileges required: The attacker does not need an account or existing privileges.UINoneUser interaction: No action by another user is required.SChangedScope: The attack can affect a component governed by a different security authority.CHighConfidentiality impact: A successful attack can cause a major loss.IHighIntegrity impact: A successful attack can cause a major loss.ANoneAvailability impact: No direct loss is represented by this metric.
Post-exploitation / living off the land
The issue can support a local privilege or sandbox boundary transition; normal system utilities may then be available in the gained context.
UnauthenticatedCWE-203
A

Official authority intelligence

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

Cyber Security Agency of Singapore · English · CSA-SB-20211117Security Bulletin 17 Nov 2021

The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 17 Nov 2021, published on 17 November 2021. Open the linked bulletin for the product, severity and reference information published in that issue.

Official advisory ↗
CERT-FR · French · CERTFR-2021-AVI-837Multiples vulnérabilités dans Google Android

.cve.org/CVERecord?id=CVE-2021-0927 Référence CVE CVE-2021-0928 https://www.cve.org/CVERecord?id=CVE-2021-0928 Référence CVE CVE-2021-0929 https://www.cve.org/CVERecord?id=CVE-2021-0929 Référence CVE CVE-2021-0930 https://www.cve.org/CVERecord?id=CVE-2021-0930 Référence CVE CVE-2021-0931 https://www.cve.org/CVERecord?id=CVE-2021-0931 Référence CVE CVE-2021-0932 https://www.cve.org/CVERecord?id=CVE-2021-0932 Référence CVE CVE-2021-0933 https://www.cve.org/CVERecord?id=CVE-2021-0933 Référence CVE CVE-2021-1048 https://www.cve.org/CVERecord?id=CVE-2021-1048 Référence CVE CVE-2021-1921 https://www.cve.org/CVERecord?id=CVE-2021-1921 Référence CVE CVE-2021-1924 https://www.cve.org/CVERecord?id=CVE-2021-1924 Référence CVE CVE-2021-1973 https://www.cve.org/CVERecord?id=CVE-2021-1973 Référence CVE CVE-2021-1975 https://www.cve.org/CVERecord?id=CVE-2021-1975 Référence CVE CVE-2021-1979 https://www.cve.org/CVERecord?id=CVE-2021-1979 Référence CVE CVE-2021-1981 https://www.cve.org/CVERecord?id=CVE-2021-1981 Référence CVE CVE-2021-1982 https://www.cve.org/CVERecord?id=CVE-2021-1982 Référence CVE CVE-2021-30254 https://www.cve.org/CVERecord?id=CVE-2021-30254 Référence CVE CVE-2021-30255 https://www.cve.org/CVERecord?id=CVE-2021-30255 Référence CVE CVE-2021-30259 https://www.cve.org/CVERecord?id=CVE-2021-30

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2021-014893複数の Qualcomm 製品における観測可能な不一致に関する脆弱性

複数の Qualcomm 製品には、観測可能な不一致に関する脆弱性が存在します。

Official advisory ↗
KISA KrCERT/CC · Korean · KNVD-5437안드로이드OS 보안 업데이트 권고

#### 안드로이드OS 보안 업데이트 권고 2021.11.11 ##### □ 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 AOSP(Android Open Source Project)에서 조작된 패킷을 전송할 때 발생하는 원격코드실행 취약점(CVE-2021-0918) 등 18개 o Android TV에서 발생하는 임의코드실행 취약점(CVE-2021-0889) 등 2개 o Android MediaTek 컴포넌트에서 발생하는 권한상승 취약점(CVE-2021-0672) o Android의 커널 컴포넌트에서 발생하는 권한상승 취약점(CVE-2021-1048) 등 4개 o Android의 퀄컴(Qualcomm) 컴포넌트에서 발생하는 권한상승 취약점(CVE-2021-1924) 등 11개 ##### □ 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/security/bulletin/2021-11-01 [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
Snapdragon Auto, Snapdragon Compute, Snapdragon Connectivity, Snapdragon Consumer Electronics Connectivity, Snapdragon Consumer IOT, Snapdragon Industrial IOT, Snapdragon IoT, Snapdragon Voice & Music, Snapdragon Wearables, Snapdragon Wired Infrastructure and Networking: APQ8009, APQ8009W, APQ8016, APQ8017, APQ8037, APQ8052, APQ8056, APQ8062, APQ8064AU, APQ8076, APQ8084, APQ8096AU, AR3012, AR7420, AR8031, AR8035, AR9380, AR9580, CSR6030, CSR8811, CSRA6620, CSRA6640, CSRB31024, FSM10055, FSM10056, FSM9900, FSM9905, FSM9910, FSM9915, FSM9916, FSM9950, FSM9955, IPQ4018, IPQ4019, IPQ4028, IPQ4029, IPQ5010, IPQ5018, IPQ5028, IPQ6000, IPQ6005, IPQ6010, IPQ6018, IPQ6028, IPQ8062, IPQ8064, IPQ8065, IPQ8066, IPQ8068, IPQ8069, IPQ8070, IPQ8070A, IPQ8071, IPQ8071A, IPQ8072, IPQ8072A, IPQ8074, IPQ8074A, IPQ8076, IPQ8076A, IPQ8078, IPQ8078A, IPQ8173, IPQ8174, MDM8207, MDM8635M, MDM9150, MDM9205, MDM9206, MDM9207, MDM9225, MDM9225M, MDM9230, MDM9235M, MDM9250, MDM9330, MDM9607, MDM9625, MDM9625M, MDM9626, MDM9628, MDM9630, MDM9635M, MDM9640, MDM9645, MDM9650, MDM9655, MSM8108, MSM8208, MSM8209, MSM8608, MSM8909W, MSM8916, MSM8917, MSM8920, MSM8937, MSM8940, MSM8952, MSM8956, MSM8962, MSM8976, MSM8976SG, MSM8996AU, PM8937, PMD9635, PMP8074, QCA10901, QCA1990, QCA4004, QCA402 ...[truncated*]
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 12 Nov 2021 · Last source change 3 Aug 2024, 16:25 UTC · CWE-203 · Observable Discrepancy

CVE recordCVE.org · 5.1
CVSS sourceCNA
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-2021-7388
Product sourceCNA
Remediation sourceCVE/CNA references
CWE sourceNIST NVD
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-2021-7388↗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-2021-1924 · cve.blacktree.nl