CASCACascade Atlas

Evidence dossier

CVE-2024-53150

ALSA: usb-audio: Fix out of bounds reads when finding clock sources

Exploited in the wild (CISA KEV since Apr 9, 2025). NVD reports CVSS 3.1 7.1. EPSS estimates 1.4% exploit likelihood as of Aug 27, 2026.

64.3–66.2Priority 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 out of bounds reads when finding clock sources The current USB-audio driver code doesn't check bLength of each descriptor at traversing for clock descriptors. That is, when a device provides a bogus descriptor with a shorter bLength, the driver might hit out-of-bounds reads. For addressing it, this patch adds sanity checks to the validator functions for the clock descriptor traversal. When the descriptor length is shorter than expected, it's skipped in the loop. For the clock source and clock multiplier descriptors, we can just check bLength against the sizeof() of each descriptor type. OTOH, the clock selector descriptor of UAC2 and UAC3 has an array of bNrInPins elements and two more fields at its tail, hence those have to be checked in addition to the sizeof() check.

State
PUBLISHED
Published
Dec 24, 2024
Updated
May 23, 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

    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 out of bounds reads when finding clock sources

    Inspect raw assertion
    Field
    container
    Value
    ALSA: usb-audio: Fix out of bounds reads when finding clock sources
    Original evidence ↗
  4. Source dateFirst observed by CASCA
    CISA KEV

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

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

    EPSS score: 1.35% probability · 69.5th percentile

    Inspect raw assertion
    Field
    model_probability
    Value
    Probability 0.013510000000; percentile 0.694960000000
    Original evidence ↗
ExploitationCatalog member

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

Exploit likelihood1.35%

FIRST EPSS · score date Aug 27, 2026 · 69.5th percentile · first observed Aug 27, 2026

SeverityCVSS 7.1

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

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 out of bounds reads when finding clock sources

Inspect raw assertion
Field
container
Value
ALSA: usb-audio: Fix out of bounds reads when finding clock sources
Source dateSource date omittedFirst observed by CASCAOriginal evidence ↗
CISA KEVOriginal assertion
Exploitation cataloged

Linux Kernel Out-of-Bounds Read Vulnerability

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

1.35% probability · 69.5th percentile

Inspect raw assertion
Field
model_probability
Value
Probability 0.013510000000; percentile 0.694960000000
Source dateFirst observed by CASCAOriginal evidence ↗

Applicability

Cited product scope

Trace impact →
8Underlying assertions
2Canonical products
8Target 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: b8e4f1fdfa422398c2d6c47bfb7d1feb3046d70a to before a632bdcb359fd8145e86486ff8612da98e239acd (git comparison)Affected: b8e4f1fdfa422398c2d6c47bfb7d1feb3046d70a to before 45a92cbc88e4013bfed7fd2ccab3ade45f8e896b (git comparison)Affected: b8e4f1fdfa422398c2d6c47bfb7d1feb3046d70a to before ab011f7439d9bbfd34fd3b9cef4b2d6d952c9bb9 (git comparison)Affected: b8e4f1fdfa422398c2d6c47bfb7d1feb3046d70a to before da13ade87a12dd58829278bc816a61bea06a56a9 (git comparison)Affected: b8e4f1fdfa422398c2d6c47bfb7d1feb3046d70a to before 74cb86e1006c5437b1d90084d22018da30fddc77 (git comparison)Affected: b8e4f1fdfa422398c2d6c47bfb7d1feb3046d70a to before ea0fa76f61cf8e932d1d26e6193513230816e11d (git comparison)Affected: b8e4f1fdfa422398c2d6c47bfb7d1feb3046d70a to before 096bb5b43edf755bc4477e64004fa3a20539ec2f (git comparison)Affected: b8e4f1fdfa422398c2d6c47bfb7d1feb3046d70a to before a3dd4d63eeb452cfb064a13862fb376ab108f6a6 (git comparison)Affected: 9feeaa50e5b4b0b71259d918a36ecf9059e60796 (git comparison)Affected: 3b17a13b687ae99939dc94a4ae01fbc34f68decc (git comparison)Affected: 4.19.84 to before 4.20 (semver comparison)Affected: 5.3.11 to before 5.4 (semver comparison)
Source-reported scope

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

Inspect raw assertion[{"status": "affected", "version": "b8e4f1fdfa422398c2d6c47bfb7d1feb3046d70a", "lessThan": "a632bdcb359fd8145e86486ff8612da98e239acd", "versionType": "git"}, {"status": "affected", "version": "b8e4f1fdfa422398c2d6c47bfb7d1feb3046d70a", "lessThan": "45a92cbc88e4013bfed7fd2ccab3ade45f8e896b", "versionType": "git"}, {"status": "affected", "version": "b8e4f1fdfa422398c2d6c47bfb7d1feb3046d70a", "lessThan": "ab011f7439d9bbfd34fd3b9cef4b2d6d952c9bb9", "versionType": "git"}, {"status": "affected", "version": "b8e4f1fdfa422398c2d6c47bfb7d1feb3046d70a", "lessThan": "da13ade87a12dd58829278bc816a61bea06a56a9", "versionType": "git"}, {"status": "affected", "version": "b8e4f1fdfa422398c2d6c47bfb7d1feb3046d70a", "lessThan": "74cb86e1006c5437b1d90084d22018da30fddc77", "versionType": "git"}, {"status": "affected", "version": "b8e4f1fdfa422398c2d6c47bfb7d1feb3046d70a", "lessThan": "ea0fa76f61cf8e932d1d26e6193513230816e11d", "versionType": "git"}, {"status": "affected", "version": "b8e4f1fdfa422398c2d6c47bfb7d1feb3046d70a", "lessThan": "096bb5b43edf755bc4477e64004fa3a20539ec2f", "versionType": "git"}, {"status": "affected", "version": "b8e4f1fdfa422398c2d6c47bfb7d1feb3046d70a", "lessThan": "a3dd4d63eeb452cfb064a13862fb376ab108f6a6", "versionType": "git"}, {"status": "affected", "version": "9feeaa50e5b4b0b71259d918a36ecf9059e60796", "versionType": "git"}, {"status": "affected", "version": "3b17a13b687ae99939dc94a4ae01fbc34f68decc", "versionType": "git"}, {"status": "affected", "version": "4.19.84", "lessThan": "4.20", "versionType": "semver"}, {"status": "affected", "version": "5.3.11", "lessThan": "5.4", "versionType": "semver"}]
Linux · source assertedLinuxLinuxDirect source scope
Affected: 5.4Unaffected: 0 to before 5.4 (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": "5.4"}, {"status": "unaffected", "version": "0", "lessThan": "5.4", "versionType": "semver"}, {"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
    0 · node/0 · match 0
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    fa6feec2-9f11-4643-8827-749718254fed
NVD CPE · OPERATING SYSTEMlinuxlinux_kernelVulnerable target · 7 assertions
Any version (unconstrained) (>= 5.11, < 5.15.174); Any version (unconstrained) (>= 5.16, < 6.1.120); Any version (unconstrained) (< 5.4.287); 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
    1 · node/0 · match 2
    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
    1 · node/0 · match 6
    Logic
    OR
    Version bounds
    from including 6.12; through excluding 6.12.2
    Match ID
    d8882b1b-2abc-4838-ac1d-dbdbb5764776
  3. cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    1 · node/0 · match 4
    Logic
    OR
    Version bounds
    from including 6.2; through excluding 6.6.64
    Match ID
    ca16dee3-abec-4449-9f4a-7a3dc4fc36c7
  4. cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    1 · node/0 · match 3
    Logic
    OR
    Version bounds
    from including 5.16; through excluding 6.1.120
    Match ID
    09ac6122-e2a4-40fe-9d33-268a1b2ec265
  5. cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    1 · node/0 · match 0
    Logic
    OR
    Version bounds
    through excluding 5.4.287
    Match ID
    dc7d5c80-b677-4131-a399-3366d7f3961c
  6. cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    1 · node/0 · match 1
    Logic
    OR
    Version bounds
    from including 5.5; through excluding 5.10.231
    Match ID
    b5c644cc-2bd7-4e32-bc54-8dcc7abe9935
  7. cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    1 · node/0 · match 5
    Logic
    OR
    Version bounds
    from including 6.7; through excluding 6.11.11
    Match ID
    21434379-192d-472f-9b54-d45e3650e893

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
7
Mapping revision
cpe23-exact-mapping-v1
Observed cutoff
Aug 27, 2026
Retained assertion IDs
4e161ae8-5762-4730-9714-83615e0689c25d00669d-8201-462a-a276-4d2fcb2089b69975e622-c8f3-4b3f-beaf-6cc6142b0025afe8e3da-a226-4bd4-aab1-08385521684dd9bbfd6e-f55d-4605-87d0-1fb4f0e87484dfaf250b-b976-411a-86c2-9751a0d6c877fc5b87f9-fd87-408c-a3c2-b5b0569d61bf
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
8030460c-83ec-4b5e-a5bf-b632c7cd1051
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
85065e49-d861-449e-bb5c-415ff572077febb9fdbd-5a3f-4f13-8acc-1407a20efa7f

Assessments

CVSS by origin

7.1
NVDCVSS 3.1 · role Primary · priority eligiblevalid_matchCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
7.1
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:N/A:H
7.1
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:N/A:H

Direct CVE/CNA normalized decisions

7.1Priority 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:N/A:H
Validation
Valid match
Recomputed
7.1
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.