CASCACascade Atlas

Evidence dossier

CVE-2024-53197

ALSA: usb-audio: Fix potential out-of-bound accesses for Extigy and Mbox devices

Exploited in the wild (CISA KEV since Apr 9, 2025). CISA-ADP reports CVSS 3.1 7.8. EPSS estimates 3.6% exploit likelihood as of Aug 27, 2026.

67.5–69.4Priority evidence range
Evidence current through Aug 27, 2026, 6:09 PM UTC

As of Aug 27, 2026

Normalized restatement

In the Linux kernel, the following vulnerability has been resolved: ALSA: usb-audio: Fix potential out-of-bound accesses for Extigy and Mbox devices A bogus device can provide a bNumConfigurations value that exceeds the initial value used in usb_get_configuration for allocating dev->config. This can lead to out-of-bounds accesses later, e.g. in usb_destroy_configuration.

State
PUBLISHED
Published
Dec 27, 2024
Updated
May 11, 2026
Evidence coverage
97%

Evidence chronology

What was known when

Download this view's receipt →
  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
    Linux

    Record text: ALSA: usb-audio: Fix potential out-of-bound accesses for Extigy and Mbox devices

    Inspect raw assertion
    Field
    container
    Value
    ALSA: usb-audio: Fix potential out-of-bound accesses for Extigy and Mbox devices
    Original evidence ↗
  4. Source dateFirst observed by CASCA
    CISA KEV

    Exploitation cataloged: Linux Kernel Out-of-Bounds Access Vulnerability

    Inspect raw assertion
    Field
    observed_exploitation
    Value
    Linux Kernel Out-of-Bounds Access Vulnerability
    Original evidence ↗
  5. Source dateFirst observed by CASCA
    FIRST EPSS

    EPSS score: 3.56% probability · 88.47th percentile

    Inspect raw assertion
    Field
    model_probability
    Value
    Probability 0.035580000000; percentile 0.884670000000
    Original evidence ↗
ExploitationCatalog member

CISA KEV · catalog date Apr 9, 2025 · first observed Jul 19, 2026

Exploit likelihood3.56%

FIRST EPSS · score date Aug 27, 2026 · 88.5th percentile · first observed Aug 27, 2026

SeverityCVSS 7.8

CISA-ADP · 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

Inspect raw assertion
Field
container
Value
CVE Program Container
Source dateSource date omittedFirst observed by CASCAOriginal evidence ↗
LinuxOriginal assertion
Record text

ALSA: usb-audio: Fix potential out-of-bound accesses for Extigy and Mbox devices

Inspect raw assertion
Field
container
Value
ALSA: usb-audio: Fix potential out-of-bound accesses for Extigy and Mbox devices
Source dateSource date omittedFirst observed by CASCAOriginal evidence ↗
CISA KEVOriginal assertion
Exploitation cataloged

Linux Kernel Out-of-Bounds Access Vulnerability

Inspect raw assertion
Field
observed_exploitation
Value
Linux Kernel Out-of-Bounds Access Vulnerability
Source dateFirst observed by CASCAOriginal evidence ↗
FIRST EPSSOriginal assertion
EPSS score

3.56% probability · 88.47th percentile

Inspect raw assertion
Field
model_probability
Value
Probability 0.035580000000; percentile 0.884670000000
Source dateFirst observed by CASCAOriginal evidence ↗

Applicability

Cited product scope

Trace impact →
9Underlying assertions
2Canonical products
9Target assertions
0Constraint 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

4 scope groups

Linux · source assertedLinuxLinuxDirect source scope
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 0b4ea4bfe16566b84645ded1403756a2dc4e0f19 (git comparison)Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 9b8460a2a7ce478e0b625af7c56d444dc24190f7 (git comparison)Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 62dc01c83fa71e10446ee4c31e0e3d5d1291e865 (git comparison)Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 9887d859cd60727432a01564e8f91302d361b72b (git comparison)Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 920a369a9f014f10ec282fd298d0666129379f1b (git comparison)Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before b8f8b81dabe52b413fe9e062e8a852c48dd0680d (git comparison)Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 379d3b9799d9da953391e973b934764f01e03960 (git comparison)Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before b521b53ac6eb04e41c03f46f7fe452e4d8e9bcca (git comparison)Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before b909df18ce2a998afef81d58bbd1a05dc0788c40 (git comparison)
Source-reported scope

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

Inspect raw assertion[{"status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "0b4ea4bfe16566b84645ded1403756a2dc4e0f19", "versionType": "git"}, {"status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "9b8460a2a7ce478e0b625af7c56d444dc24190f7", "versionType": "git"}, {"status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "62dc01c83fa71e10446ee4c31e0e3d5d1291e865", "versionType": "git"}, {"status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "9887d859cd60727432a01564e8f91302d361b72b", "versionType": "git"}, {"status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "920a369a9f014f10ec282fd298d0666129379f1b", "versionType": "git"}, {"status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "b8f8b81dabe52b413fe9e062e8a852c48dd0680d", "versionType": "git"}, {"status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "379d3b9799d9da953391e973b934764f01e03960", "versionType": "git"}, {"status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "b521b53ac6eb04e41c03f46f7fe452e4d8e9bcca", "versionType": "git"}, {"status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "b909df18ce2a998afef81d58bbd1a05dc0788c40", "versionType": "git"}]
Linux · source assertedLinuxLinuxDirect source scope
Affected: 2.6.12Unaffected: 0 to before 2.6.12 (semver comparison)Unaffected: 4.19.325 through 4.19.* (semver comparison)Unaffected: 5.4.287 through 5.4.* (semver comparison)Unaffected: 5.10.231 through 5.10.* (semver comparison)Unaffected: 5.15.174 through 5.15.* (semver comparison)Unaffected: 6.1.120 through 6.1.* (semver comparison)Unaffected: 6.6.64 through 6.6.* (semver comparison)Unaffected: 6.11.11 through 6.11.* (semver comparison)Unaffected: 6.12.2 through 6.12.* (semver comparison)Unaffected: 6.13 through * (original_commit_for_fix comparison)
Source-reported scope

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

Inspect raw assertion[{"status": "affected", "version": "2.6.12"}, {"status": "unaffected", "version": "0", "lessThan": "2.6.12", "versionType": "semver"}, {"status": "unaffected", "version": "4.19.325", "versionType": "semver", "lessThanOrEqual": "4.19.*"}, {"status": "unaffected", "version": "5.4.287", "versionType": "semver", "lessThanOrEqual": "5.4.*"}, {"status": "unaffected", "version": "5.10.231", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.15.174", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.120", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.64", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.11.11", "versionType": "semver", "lessThanOrEqual": "6.11.*"}, {"status": "unaffected", "version": "6.12.2", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.13", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}]
NVD CPE · OPERATING SYSTEMdebiandebian_linuxVulnerable target · 1 assertions
Version 11.0Canonical identity product-3ccb4bc87dfae98fa2f2a06435fe5b3d9be78572fb958a89f2d7a96b4066447eLinked exact
Scope supported
Inspect raw assertion
  1. cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    1 · node/0 · match 0
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    fa6feec2-9f11-4643-8827-749718254fed
NVD CPE · OPERATING SYSTEMlinuxlinux_kernelVulnerable target · 8 assertions
Any version (unconstrained) (>= 2.6.12, < 4.19.325); Any version (unconstrained) (>= 4.20, < 5.4.287); Any version (unconstrained) (>= 5.11, < 5.15.174); Any version (unconstrained) (>= 5.16, < 6.1.120); Any version (unconstrained) (>= 5.5, < 5.10.231); Any version (unconstrained) (>= 6.12, < 6.12.2); Any version (unconstrained) (>= 6.2, < 6.6.64); Any version (unconstrained) (>= 6.7, < 6.11.11)Canonical identity product-0eda7a801761be4590f267cf319481c8c0aaa30546d99cc064edf77989ce05c9Linked exact
Scope supported
Inspect raw assertions
  1. cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 3
    Logic
    OR
    Version bounds
    from including 5.11; through excluding 5.15.174
    Match ID
    419fd073-1517-4fd5-8158-f94bc68a1e89
  2. cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 6
    Logic
    OR
    Version bounds
    from including 6.7; through excluding 6.11.11
    Match ID
    21434379-192d-472f-9b54-d45e3650e893
  3. cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 4
    Logic
    OR
    Version bounds
    from including 5.16; through excluding 6.1.120
    Match ID
    09ac6122-e2a4-40fe-9d33-268a1b2ec265
  4. cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 0
    Logic
    OR
    Version bounds
    from including 2.6.12; through excluding 4.19.325
    Match ID
    faeb49a0-3b16-46df-aa21-ad4136295a41
  5. cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 5
    Logic
    OR
    Version bounds
    from including 6.2; through excluding 6.6.64
    Match ID
    ca16dee3-abec-4449-9f4a-7a3dc4fc36c7
  6. cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 7
    Logic
    OR
    Version bounds
    from including 6.12; through excluding 6.12.2
    Match ID
    d8882b1b-2abc-4838-ac1d-dbdbb5764776
  7. cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 2
    Logic
    OR
    Version bounds
    from including 5.5; through excluding 5.10.231
    Match ID
    b5c644cc-2bd7-4e32-bc54-8dcc7abe9935
  8. cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 1
    Logic
    OR
    Version bounds
    from including 4.20; through excluding 5.4.287
    Match ID
    e4b15788-d35e-4e5b-a9c0-070ae3729b34

Affected-product evidence

Accepted scope and product mapping

2 canonical links · 1 source-reported links

Mapping establishedEvidence supported

vendor-9c702362a97e8770255c53f324861f65f3209d35ce95f01842c69a458450f6fa · product-0eda7a801761be4590f267cf319481c8c0aaa30546d99cc064edf77989ce05c9

Source class
Nvd cpe vulnerable target
Assertions
8
Mapping revision
cpe23-exact-mapping-v1
Observed cutoff
Aug 27, 2026
Retained assertion IDs
00b76be2-9d84-4dc2-bb95-c4920fdc2d9209208f5e-e649-4106-b828-780ceb122d470e4948f1-2363-4d54-a046-36a13164614822b142b6-ba67-4d70-9d04-cbed22bf000b2b5faef1-527e-4cd7-8b55-4bc197aa64003af1a701-77b2-4192-bc39-09edeb6b1f18577bfbb7-463b-47c5-a3ae-f4c546dbeb1ef853de81-9bb1-413d-82c4-14e627bd111c
Mapping establishedEvidence supported

vendor-66ae8c5e06427f7450637d18322b0dc411c0b469d940341cf076a620d444fe3c · product-3ccb4bc87dfae98fa2f2a06435fe5b3d9be78572fb958a89f2d7a96b4066447e

Source class
Nvd cpe vulnerable target
Assertions
1
Mapping revision
cpe23-exact-mapping-v1
Observed cutoff
Aug 27, 2026
Retained assertion IDs
195ea2c7-ad0a-43fd-8e3a-47c99f6a1472
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
2
Mapping revision
cpe23-exact-mapping-v1
Observed cutoff
Aug 27, 2026
Retained assertion IDs
0feee663-2302-48e3-9ae6-167022c21868c3c174e0-7dc0-4282-9caf-61d258386b73

Assessments

CVSS by origin

7.8
CVE Program sourceCVSS 3.1 · role Secondary · priority eligiblevalid_matchCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8
CISA-ADPCVSS 3.1 · role unknown · display onlyDirect record assessment retained outside normalized eligibilityCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Direct CVE/CNA normalized decisions

7.8Priority eligible

CISA-ADP

CVSS 3.1 · Secondary · Independent enrichment · rank 2

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Validation
Valid match
Recomputed
7.8
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.