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Vulnerabilities/CVE-2021-25394Public Intelligence Dossier
Source: samsung · Limited verification•Last verified: •Collection Degraded
CVE-2021-25394ListedMEDIUM (raw)CVSS 6.4CWE-416

A use after free vulnerability via race condition in MFC charger driver prior to SMR MAY-2021 Release 1 allows arbitrary write given a radio privilege is compromised.

Published: 11 Jun 2021•Last updated: 17 Jun 2026, 09:12 AM IST•Source identifier: mobile.security@samsung.com
Dossier completeness: source-provided sections 3 / 3 · rule guidance not available. Missing source facts count as incomplete.
Official source
CISA KEV catalog
Listed
Added29 Jun 2023
Due20 Jul 2023
RansomwareUnknown
CVSS score
6.4MEDIUM (raw)
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
Metric sourcemobile.security@samsung.com
EPSS probability
0.4%0.004
Percentile34th
Weakness type
CWE-416
CWE-362
Remediation
Patch status unknown
No fixed version or KB recorded

Why It Matters

Analysis dossier

Why It Matters

A use after free vulnerability via race condition in MFC charger driver prior to SMR MAY-2021 Release 1 allows arbitrary write given a radio privilege is compromised.

SOC priority

Immediate Attention

Actively exploited (source statement)

Yes

Publicly disclosed

Unknown

Risk basis: CISA KEV exploitation signal; Source-confirmed exploitation or CISA KEV/ransomware metadata

Affected Products & Remediation

1 source-backed product
Affected products and versions (source)
  • samsung android · 8.1; 9.0; 10.0; 11.0 · NVD CPE · Source
Recorded patch / KBNot provided by source

Vendor or catalog guidance (source)

  • CISA KEV: Apply updates per vendor instructions or discontinue use of the product if updates are unavailable

Known exploitation (source facts)

Only what a source states. Unknown means no source has said either way; it is not "not exploited".

CISA KEV
Listed
Exploited (source statement)
Yes
Publicly disclosed (source)
Unknown

CISA required action: Apply updates per vendor instructions or discontinue use of the product if updates are unavailable

Suggested hunting (rule-based inference)

SecOps Signal recommendation (rule-based inference). These steps are hunting hypotheses from the vulnerability class; they do not state or imply that exploitation occurred here or anywhere.

No rule-based guidance for this vulnerability class

CISA KEV Record

Catalog entry
29 Jun 2023
Required action due
20 Jul 2023
Known ransomware use
Unknown

Apply updates per vendor instructions or discontinue use of the product if updates are unavailable

Change History & Source Data

— No recorded material change

CNA / source
mobile.security@samsung.com
Record status · verification
UPDATED · CISA KEV confirmed
CPE
cpe:2.3:o:samsung:android:8.1:-:*:*:*:*:*:*, cpe:2.3:o:samsung:android:9.0:smr-apr-2021-r1:*:*:*:*:*:*, cpe:2.3:o:samsung:android:9.0:smr-feb-2021-r1:*:*:*:*:*:*, cpe:2.3:o:samsung:android:9.0:smr-jan-2021-r1:*:*:*:*:*:*, cpe:2.3:o:samsung:android:9.0:smr-mar-2021-r1:*:*:*:*:*:*, cpe:2.3:o:samsung:android:10.0:smr-apr-2021-r1:*:*:*:*:*:*, cpe:2.3:o:samsung:android:10.0:smr-feb-2021-r1:*:*:*:*:*:*, cpe:2.3:o:samsung:android:10.0:smr-jan-2021-r1:*:*:*:*:*:*, cpe:2.3:o:samsung:android:11.0:smr-apr-2021-r1:*:*:*:*:*:*, cpe:2.3:o:samsung:android:11.0:smr-feb-2021-r1:*:*:*:*:*:*

Evidence & Provenance

4 public sources
CISA KEV CatalogAdded 2023-06-29security.samsungmobile.comSource recordnvd.nist.govSource recordcisa.govSource record

Linked by the query's stored exact CVE association. Review required tables and validation status before use.

Detection Hunting Query
Target: DeviceTvmSoftwareVulnerabilities•Defender XDR
Detect endpoints exposed to CVE-2021-25394
Purpose: Exposure assessment (Category: Exposure Check)Why linked: Query metadata names CVE-2021-25394
DeviceTvmSoftwareVulnerabilities| where CveId == "CVE-2021-25394"| project DeviceId, DeviceName, OSPlatform, OSVersion, SoftwareVendor, SoftwareName, SoftwareVersion, CveId, VulnerabilitySeverityLevel, RecommendedSecurityUpdate, RecommendedSecurityUpdateId| sort by VulnerabilitySeverityLevel desc
Schema Checked · Not runtime validatedSource: SecOps Signal deterministic template · Limited verificationStatic screening: Passed structure and schema checks; tenant execution is not verified.
Open KQL Library

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Correlated briefings

SecOps Signal surfaces public advisory facts only. A missing value means the source has not published it, not that your environment is unaffected. No tenant inventory is connected.