CASCACascade Atlas

Evidence dossier

CVE-2021-25394

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.

Exploited in the wild (CISA KEV since Jun 29, 2023). NVD reports CVSS 3.1 6.4. EPSS estimates 0.4% exploit likelihood as of Aug 27, 2026.

59.9–61.5Priority evidence range
Evidence current through Aug 27, 2026, 6:09 PM UTC

As of Aug 27, 2026

Normalized restatement

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.

State
PUBLISHED
Published
Jun 11, 2021
Updated
Oct 21, 2025
Evidence coverage
98%

Evidence chronology

What was known when

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  1. Source dateSource date omittedFirst observed by CASCA
    CISA-ADP

    Record text: CISA ADP Vulnrichment

    Inspect raw assertion
    Field
    container
    Value
    CISA ADP Vulnrichment
    Original evidence ↗
  2. Source dateSource date omittedFirst observed by CASCA
    CVE Program

    Record text: CVE Program Container

    Inspect raw assertion
    Field
    container
    Value
    CVE Program Container
    Original evidence ↗
  3. Source dateSource date omittedFirst observed by CASCA
    Samsung Mobile

    Record text: 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.

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    Field
    container
    Value
    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.
    Original evidence ↗
  4. Source dateFirst observed by CASCA
    CISA KEV

    Exploitation cataloged: Samsung Mobile Devices Race Condition Vulnerability

    Inspect raw assertion
    Field
    observed_exploitation
    Value
    Samsung Mobile Devices Race Condition Vulnerability
    Original evidence ↗
  5. Source dateFirst observed by CASCA
    FIRST EPSS

    EPSS score: 0.4% probability · 33.13th percentile

    Inspect raw assertion
    Field
    model_probability
    Value
    Probability 0.004010000000; percentile 0.331270000000
    Original evidence ↗
ExploitationCatalog member

CISA KEV · catalog date Jun 29, 2023 · first observed Jul 19, 2026

Exploit likelihood0.40%

FIRST EPSS · score date Aug 27, 2026 · 33.1th percentile · first observed Aug 27, 2026

SeverityCVSS 6.4

NVD · CVSS 3.1 · first observed Jul 19, 2026 · same-version scores align in this snapshot

Evidence detail

Source limits and decisions

Why each evidence state has this value

casca-unknown-reasons-v1
Exploitation statusEvidence supported

Eligible evidence is present for this bounded claim.

Revision
evidence-policy-v1.1.0
Cutoff
Aug 27, 2026
Resolution
None
Exploit likelihoodEvidence supported

Eligible evidence is present for this bounded claim.

Revision
evidence-policy-v1.1.0
Cutoff
Aug 27, 2026
Resolution
None
Severity assessmentEvidence supported

Eligible evidence is present for this bounded claim.

Revision
casca-direct-cvss-eligibility-v1
Cutoff
Aug 27, 2026
Resolution
None
Affected productsSource-reported scope

The cited source assertion is retained while canonical product linkage remains open.

Revision
casca-factor-d-obligations-v1
Cutoff
Aug 27, 2026
Resolution
Resolve identity

Source comparison

Who said what

CISA-ADPIndependent enrichment
Record text

CISA ADP Vulnrichment

Inspect raw assertion
Field
container
Value
CISA ADP Vulnrichment
Source dateSource date omittedFirst observed by CASCAOriginal evidence ↗
CVE ProgramDerivative copy
Record text

CVE Program Container

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Field
container
Value
CVE Program Container
Source dateSource date omittedFirst observed by CASCAOriginal evidence ↗
Samsung MobileOriginal assertion
Record text

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.

Inspect raw assertion
Field
container
Value
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.
Source dateSource date omittedFirst observed by CASCAOriginal evidence ↗
CISA KEVOriginal assertion
Exploitation cataloged

Samsung Mobile Devices Race Condition Vulnerability

Inspect raw assertion
Field
observed_exploitation
Value
Samsung Mobile Devices Race Condition Vulnerability
Source dateFirst observed by CASCAOriginal evidence ↗
FIRST EPSSOriginal assertion
EPSS score

0.4% probability · 33.13th percentile

Inspect raw assertion
Field
model_probability
Value
Probability 0.004010000000; percentile 0.331270000000
Source dateFirst observed by CASCAOriginal evidence ↗

Applicability

Cited product scope

Trace impact →
12Underlying assertions
1Canonical products
12Target assertions
0Constraint assertions

Grouped from 1 configuration nodes in this exact snapshot. Visual grouping is navigational; asset exposure and root cause require cited evidence.

Identity source boundaries
  • Cpe dictionary1,775,266 records · observed through 2026-07-21T06:45:29.809Z27d65b0f-b718-4b4f-bb79-c47c68d09dfa
  • Cpe match643,502 records · observed through 2026-07-21T08:13:17.697Z955dae73-7302-438b-aee1-058d7cc5d48e

2 scope groups

Samsung Mobile · source assertedSamsung MobileSamsung Mobile DevicesDirect source scope
Affected: O(8.x), P(9.0), Q(10.0), R(11.0) to before SMR MAY-2021 Release 1 (custom comparison)
Source-reported scope

Canonical linkage remains open; the cited source assertion is retained below.

Inspect raw assertion[{"status": "affected", "version": "O(8.x), P(9.0), Q(10.0), R(11.0)", "lessThan": "SMR MAY-2021 Release 1", "versionType": "custom"}]
NVD CPE · OPERATING SYSTEMsamsungandroidVulnerable target · 12 assertions
Version 10.0; Version 11.0; Version 8.1; Version 9.0Canonical identity product-bfc06cdae9e73738e7672364f70046bdc0b0c8dcf806dda71f982d32086f0748Linked exact
Scope supported
Inspect raw assertions
  1. cpe:2.3:o:samsung:android:10.0:smr-apr-2021-r1:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 5
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    5e21936d-9a60-4987-a6bf-c8f1885fb478
  2. cpe:2.3:o:samsung:android:11.0:smr-jul-2021-r1:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 11
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    2b088de9-31f1-4737-8bc8-cc406f208acb
  3. cpe:2.3:o:samsung:android:9.0:smr-apr-2021-r1:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 1
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    c690d390-5631-4294-aeb8-9a4c5564fa44
  4. cpe:2.3:o:samsung:android:10.0:smr-jan-2021-r1:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 7
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    878aaf2d-e54a-4145-a618-81341ed4b0c8
  5. cpe:2.3:o:samsung:android:9.0:smr-feb-2021-r1:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 2
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    3b9a3b41-aac9-4e23-a265-959a9852b94c
  6. cpe:2.3:o:samsung:android:11.0:smr-apr-2021-r1:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 8
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    8d2d0083-0a85-47f7-a42d-2040a3bec132
  7. cpe:2.3:o:samsung:android:10.0:smr-feb-2021-r1:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 6
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    18c71f11-7599-4ae1-b455-c7a50d8d5f4d
  8. cpe:2.3:o:samsung:android:11.0:smr-feb-2021-r1:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 9
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    25b42ce0-67de-4611-8d70-deec975e32ba
  9. cpe:2.3:o:samsung:android:8.1:-:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 0
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    3e4f5c8c-af0c-47f4-a3b0-a6d924fb72bb
  10. cpe:2.3:o:samsung:android:11.0:smr-jan-2021-r1:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 10
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    ac082e25-1b7d-473d-a066-1463e6321cd5
  11. cpe:2.3:o:samsung:android:9.0:smr-mar-2021-r1:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 4
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    62a933c7-9739-43dd-851e-0c2009858b77
  12. cpe:2.3:o:samsung:android:9.0:smr-jan-2021-r1:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 3
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    b93a5f5f-bf53-44d3-9583-811cc284df86

Affected-product evidence

Accepted scope and product mapping

1 canonical links · 1 source-reported links

Mapping establishedEvidence supported

vendor-f5dacb581a70d8167abc17518c04a02619f423bdc572eef0300ff12be72a5a70 · product-bfc06cdae9e73738e7672364f70046bdc0b0c8dcf806dda71f982d32086f0748

Source class
Nvd cpe vulnerable target
Assertions
12
Mapping revision
cpe23-exact-mapping-v1
Observed cutoff
Aug 27, 2026
Retained assertion IDs
16ff12e9-091e-4b90-a406-451aea83d12618e222c6-681c-4973-8d57-7fbb80bebd6823287f52-1341-4076-b9f9-def8e17d3c013a27b701-4493-4339-9b90-2425125819f243686ac6-d97b-471e-8e61-80f616d7721f4e849d69-6f7e-4eec-af26-41ffa5a5ee4670d8a6d9-4aeb-4f0b-957c-431d27f9d1969d90183b-6cc9-4ec3-8c18-118f25b6fa0bb752d46a-63c7-4e54-b45c-a0cfe804a7c6f0735b79-ff91-449e-899d-d06c690e9dacf8997177-1a34-4955-9e98-e8df92f1527afe307c25-4d0e-45b2-88e7-987c2982676e
Source-reported scopeSource-reported scope

Canonical linkage remains open; the cited source assertion is retained below.

Vendor specified only by source · Product specified only by source

Source class
Direct cve affected
Assertions
1
Mapping revision
cpe23-exact-mapping-v1
Observed cutoff
Aug 27, 2026
Retained assertion IDs
b3a72482-3624-47b9-8ef2-0b162b0ffb70

Assessments

CVSS by origin

6.4
NVDCVSS 3.1 · role Primary · priority eligiblevalid_matchCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
4.4
NVDCVSS 2.0 · role Primary · priority eligiblevalid_matchAV:L/AC:M/Au:N/C:P/I:P/A:P
6.4
mobile.security@samsung.comCVSS 3.1 · role Secondary · priority eligiblevalid_matchCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
6.4
Samsung MobileCVSS 3.1 · role unknown · display onlyDirect record assessment retained outside normalized eligibilityCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

Direct CVE/CNA normalized decisions

6.4Priority eligible

Samsung Mobile

CVSS 3.1 · Primary · Original assertion · rank 1

CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
Validation
Valid match
Recomputed
6.4
Decision reason
Evidence supported
Policy
casca-direct-cvss-eligibility-v1

Assessments are retained side by side under closed precedence. Cascade never averages CVSS.

Evidence boundaries

  • KEV membership is authoritative for the catalog, not proof of exposure in any environment.
  • EPSS is a dated model probability and not an individual-environment prediction.
  • Affected or fixed status applies only to the exact cited product and version scope; remaining scope stays source-scoped.
  • NVD-carried upstream facts remain derivative; independent corroboration requires a separately authored source.
  • Only NVD metrics validated under the generation-bound calculator are Public Priority eligible; direct CVE record metrics remain display-only.
  • NVD CVSS source eligibility is closed: NVD-authored, exact record-source, or registered same-CVE container origin; unmapped sources remain display-only.
  • Core replay supports the active and immediately prior generation; retrospective valid-at replay is deferred.
  • OSV aggregation and OSV-converted NVD material are not independent corroboration.
  • Red Hat facts are vendor assertions for the exact supplied products.
  • Nonmembership and not-yet-observed states are not proof of safety.