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CVE Record

CVE-2024-41056: firmware: cs_dsp: Use strnlen() on name fields in V1 wmfw files

In the Linux kernel, the following vulnerability has been resolved: firmware: cs_dsp: Use strnlen() on name fields in V1 wmfw files Use strnlen() instead of strlen() on the algorithm and coefficient name string arrays in V1 wmfw files. In V1 wmfw files the name is a NUL-terminated string in a fixed-size array. cs_dsp should protect against overrunning the array if the NUL terminator is missing.

HighCVSS 7.3Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

A flaw in the Linux kernel’s Cirrus Logic DSP firmware parser can read beyond a fixed-size name field when processing malformed V1 wmfw firmware. A locally authenticated, low-privileged attacker may be able to cause serious confidentiality or availability impact. Exposure depends on whether the affected cs_dsp path and V1 wmfw files are used.

Executive priority

Treat this as a high-priority kernel maintenance issue on systems using the affected DSP firmware path. Accelerate remediation where local low-privileged users can influence firmware inputs. For other systems, verify applicability and incorporate the fixed kernel into the next controlled patch cycle.

Technical view

cs_dsp used strlen() on fixed-size algorithm and coefficient name arrays in V1 wmfw files. If a name lacked a NUL terminator, parsing could continue beyond the array boundary. The stable fix replaces strlen() with strnlen(), bounding the read. The supplied CVSS 3.1 score is 7.3 with local, low-privilege, no-interaction attack requirements.

Likely exposure

Potentially exposed systems run an affected Linux kernel, use the cs_dsp firmware subsystem, and process V1 wmfw files. The bundle identifies versions from 5.16 and affected stable-series releases, but does not provide complete distribution package mappings. Systems without this hardware or firmware path may not be practically exposed.

Exploitation context

The CVSS vector describes local access with low privileges, low complexity, and no user interaction. CISA KEV status is false in the supplied bundle, and no cited source establishes active exploitation. A malformed V1 wmfw file appears necessary, but the sources do not fully document how an attacker could introduce one.

Researcher notes

The defect is an out-of-bounds read caused by an unterminated string in a fixed-size V1 wmfw field. The patch bounds algorithm and coefficient name reads with strnlen(). The source bundle supplies four stable commits but does not map each commit to a branch or identify exact distribution package versions. No exploitation evidence or exploitability proof is provided.

Mitigation direction

  • Install a vendor-supported kernel containing the cited stable fix for the deployed branch.
  • Consult the operating-system vendor for exact fixed package versions and reboot requirements.
  • Restrict untrusted users or processes from supplying or modifying DSP firmware files.
  • Prioritize systems that actively use Cirrus Logic DSP hardware and V1 wmfw firmware.

Validation and detection

  • Inventory kernel versions and compare them with vendor advisories for CVE-2024-41056.
  • Determine whether affected systems load V1 wmfw files through the cs_dsp subsystem.
  • Confirm the installed kernel includes the relevant stable-branch fix.
  • After updating, verify the fixed kernel is running following any required reboot.
Prepared
Confidence
medium
Sources
7

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

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CVE-2024-41056 mapping review

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Vulnerability profileCVE Program record
Severity
High
CVSS
7.3 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
3Timeline events
2ADP providers
6Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: noTechnical Impact: partial

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
7.3CVSS 3.1HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H1.85.5Linux

Vulnerability scoring details

Base CVSS 3.1 score

7.3High
CVSS 3.1 vector shape for CVE-2024-41056Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CVECVE Program Container
CISA-ADPCISA ADP Vulnrichment
other:ssvc

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinuxf6bc909e7673c30abcbdb329e7d0aa2e83c103d7, f6bc909e7673c30abcbdb329e7d0aa2e83c103d7, f6bc909e7673c30abcbdb329e7d0aa2e83c103d7, f6bc909e7673c30abcbdb329e7d0aa2e83c103d7unaffected
LinuxLinux5.16, 0, 6.1.100, 6.6.41, 6.9.10, 6.10affected
Weakness

CWE details

No CWE listed

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