CASCACascade Atlas

Evidence dossier

CVE-2021-25372

An improper boundary check in DSP driver prior to SMR Mar-2021 Release 1 allows out of bounds memory access.

Exploited in the wild (CISA KEV since Jun 29, 2023). NVD reports CVSS 3.1 6.7. EPSS estimates 0.8% exploit likelihood as of Aug 27, 2026.

59.7–62.7Priority evidence range
Evidence current through Aug 27, 2026, 6:09 PM UTC

As of Aug 27, 2026

Normalized restatement

An improper boundary check in DSP driver prior to SMR Mar-2021 Release 1 allows out of bounds memory access.

State
PUBLISHED
Published
Mar 26, 2021
Updated
Jan 14, 2026
Evidence coverage
97%

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

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

    Record text: An improper boundary check in DSP driver prior to SMR Mar-2021 Release 1 allows out of bounds memory access.

    Inspect raw assertion
    Field
    container
    Value
    An improper boundary check in DSP driver prior to SMR Mar-2021 Release 1 allows out of bounds memory access.
    Original evidence ↗
  4. Source dateFirst observed by CASCA
    CISA KEV

    Exploitation cataloged: Samsung Mobile Devices Improper Boundary Check Vulnerability

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

    EPSS score: 0.8% probability · 54.11th percentile

    Inspect raw assertion
    Field
    model_probability
    Value
    Probability 0.008040000000; percentile 0.541060000000
    Original evidence ↗
ExploitationCatalog member

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

Exploit likelihood0.80%

FIRST EPSS · score date Aug 27, 2026 · 54.1th percentile · first observed Aug 27, 2026

SeverityCVSS 6.7

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

An improper boundary check in DSP driver prior to SMR Mar-2021 Release 1 allows out of bounds memory access.

Inspect raw assertion
Field
container
Value
An improper boundary check in DSP driver prior to SMR Mar-2021 Release 1 allows out of bounds memory access.
Source dateSource date omittedFirst observed by CASCAOriginal evidence ↗
CISA KEVOriginal assertion
Exploitation cataloged

Samsung Mobile Devices Improper Boundary Check Vulnerability

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

0.8% probability · 54.11th percentile

Inspect raw assertion
Field
model_probability
Value
Probability 0.008040000000; percentile 0.541060000000
Source dateFirst observed by CASCAOriginal evidence ↗

Applicability

Cited product scope

Trace impact →
7Underlying assertions
4Canonical products
4Target assertions
3Constraint assertions

Grouped from 2 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

5 scope groups

Samsung Mobile · source assertedSamsung MobileSamsung Mobile DevicesDirect source scope
Affected: Q(10.0), R(11.0) devices with exynos980, exynos2100, exynos9830 to before SMR Mar-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": "Q(10.0), R(11.0) devices with exynos980, exynos2100, exynos9830", "lessThan": "SMR Mar-2021 Release 1", "versionType": "custom"}]
NVD CPE · OPERATING SYSTEMsamsungandroidVulnerable target · 4 assertions
Version 10.0; Version 11.0Canonical identity product-bfc06cdae9e73738e7672364f70046bdc0b0c8dcf806dda71f982d32086f0748Linked exact
Scope supported
Inspect raw assertions
  1. cpe:2.3:o:samsung:android:11.0: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
    ac082e25-1b7d-473d-a066-1463e6321cd5
  2. cpe:2.3:o:samsung:android:11.0: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
    25b42ce0-67de-4611-8d70-deec975e32ba
  3. cpe:2.3:o:samsung:android:10.0:smr-feb-2021-r1:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 0
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    18c71f11-7599-4ae1-b455-c7a50d8d5f4d
  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 1
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    878aaf2d-e54a-4145-a618-81341ed4b0c8
NVD CPE · HARDWAREsamsungexynos_2100Environmental constraint · 1 assertions
Version not applicableCanonical identity product-8b216fc9dfafcff1a6f3daa859b4d19928226bff232d50f59bcfa456f9efd8c0Linked exact
Scope constrained
Inspect raw assertion
  1. cpe:2.3:h:samsung:exynos_2100:-:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Environmental constraint
    Configuration
    0 · node/1 · match 0
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    9385885d-654a-496e-8029-7c6d9b077193
NVD CPE · HARDWAREsamsungexynos_980Environmental constraint · 1 assertions
Version not applicableCanonical identity product-d1244492aa2bf6c2b71f108708e83b353789b4d91ffc8a1a56ab9bfb9cf34958Linked exact
Scope constrained
Inspect raw assertion
  1. cpe:2.3:h:samsung:exynos_980:-:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Environmental constraint
    Configuration
    0 · node/1 · match 1
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    0d8701b6-6989-44d1-873a-a1823bfd7ccc
NVD CPE · HARDWAREsamsungexynos_9830Environmental constraint · 1 assertions
Version not applicableCanonical identity product-ce174ea809e413d54000147e0038db317e907f2e22342db49b523bbaa1e3f0d8Linked exact
Scope constrained
Inspect raw assertion
  1. cpe:2.3:h:samsung:exynos_9830:-:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Environmental constraint
    Configuration
    0 · node/1 · match 2
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    cc599902-095f-411e-b112-1ba9a643c6c9

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
4
Mapping revision
cpe23-exact-mapping-v1
Observed cutoff
Aug 27, 2026
Retained assertion IDs
174755a6-daa7-4fc8-a857-92a4b6b5207c1ed257e1-c404-42c0-a199-31ab652a50142076a2b8-0957-47f9-ae40-fb2668d94b3333e39ee9-4aa9-4c37-a56b-b9035ea09aab
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
57dd7e0b-b47d-4909-a516-f0f67b5aa652

Assessments

CVSS by origin

6.7
NVDCVSS 3.1 · role Primary · priority eligiblevalid_matchCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
7.2
NVDCVSS 2.0 · role Primary · priority eligiblevalid_matchAV:L/AC:L/Au:N/C:C/I:C/A:C
6.1
mobile.security@samsung.comCVSS 3.1 · role Secondary · priority eligiblevalid_matchCVSS:3.1/AV:P/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
6.1
Samsung MobileCVSS 3.1 · role unknown · display onlyDirect record assessment retained outside normalized eligibilityCVSS:3.1/AV:P/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

Direct CVE/CNA normalized decisions

6.1Priority eligible

Samsung Mobile

CVSS 3.1 · Primary · Original assertion · rank 1

CVSS:3.1/AV:P/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
Validation
Valid match
Recomputed
6.1
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.