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CVE Record

CVE-2024-38551: ASoC: mediatek: Assign dummy when codec not specified for a DAI link

In the Linux kernel, the following vulnerability has been resolved: ASoC: mediatek: Assign dummy when codec not specified for a DAI link MediaTek sound card drivers are checking whether a DAI link is present and used on a board to assign the correct parameters and this is done by checking the codec DAI names at probe time. If no real codec is present, assign the dummy codec to the DAI link to avoid NULL pointer during string comparison.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysislow

Security readout for executives and security teams

Plain-English summary

This is a Linux kernel bug in MediaTek audio support. On some boards without a real codec defined for a DAI link, the driver could hit a NULL pointer while checking codec names. The sources do not show remote exploitation, data theft, or privilege escalation impact.

Executive priority

Treat this as routine kernel maintenance unless the organization operates MediaTek-based Linux devices. There is no source-backed evidence of active exploitation, but affected embedded or appliance fleets should receive vendor-fixed kernels.

Technical view

The MediaTek ASoC driver checked codec DAI names during probe to decide whether a DAI link is present and used. When no real codec was present, the codec pointer path could be NULL during string comparison. The kernel fix assigns a dummy codec for that DAI link.

Likely exposure

Exposure appears limited to Linux systems using affected MediaTek ASoC sound card driver paths, especially board configurations where a DAI link lacks a real codec. General Linux servers without this hardware or driver path are unlikely to be exposed.

Exploitation context

CISA KEV is false in the provided bundle, and no cited source reports active exploitation. The available evidence points to a probe-time kernel reliability flaw, not a documented remotely exploitable issue.

Researcher notes

The public record lacks CVSS, CWE, and detailed impact analysis. The root issue is defensive handling of absent codecs in MediaTek DAI link probing. Avoid assuming privilege escalation or remote reachability without additional vendor evidence.

Mitigation direction

  • Identify systems running Linux kernels with MediaTek ASoC sound support enabled.
  • Apply vendor or stable kernel updates containing the referenced fixes.
  • Prioritize affected MediaTek devices that show audio initialization or boot instability.
  • Check downstream device vendor guidance for backported kernel fixes.

Validation and detection

  • Confirm the running kernel version and downstream patch level.
  • Review kernel configuration for MediaTek ASoC sound card driver support.
  • Check boot logs for MediaTek ASoC probe failures or NULL pointer traces.
  • Verify the relevant stable kernel fix is included in the deployed kernel source.
Prepared
Confidence
medium
Sources
6

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

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CVE-2024-38551 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
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.

0CVSS vectors
3Timeline events
2ADP providers
5Source links

SSVC decision data

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

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
LinuxLinux4302187d955f166c03b4fa7c993b89ffbabfca4e, 4302187d955f166c03b4fa7c993b89ffbabfca4e, 4302187d955f166c03b4fa7c993b89ffbabfca4e, 4302187d955f166c03b4fa7c993b89ffbabfca4eunaffected
LinuxLinux6.3, 0, 6.6.33, 6.8.12, 6.9.3, 6.10affected
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.