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CVE Record

CVE-2022-49517: ASoC: mediatek: Fix missing of_node_put in mt2701_wm8960_machine_probe

In the Linux kernel, the following vulnerability has been resolved: ASoC: mediatek: Fix missing of_node_put in mt2701_wm8960_machine_probe This node pointer is returned by of_parse_phandle() with refcount incremented in this function. Calling of_node_put() to avoid the refcount leak.

MediumCVSS 5.5Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2022-49517 is a Linux kernel availability issue in a MediaTek audio driver. A reference-count leak can occur during device probing, potentially consuming kernel resources. It is not reported to expose data or alter data, but could affect system availability on matching systems.

Executive priority

Treat as routine patching unless the organization operates MediaTek-based Linux devices where availability matters. It is not a known exploited issue in the provided sources, but kernel availability bugs still warrant normal maintenance tracking.

Technical view

The flaw is a missing of_node_put() after of_parse_phandle() in mt2701_wm8960_machine_probe. The source says of_parse_phandle() increments the node refcount, and the fix releases it to avoid a refcount leak. CVSS 3.1 is 5.5: local, low-complexity, low-privilege, no UI, availability high.

Likely exposure

Exposure appears limited to Linux systems running affected kernel versions with the relevant MediaTek ASoC mt2701_wm8960 path present or enabled. General server exposure is uncertain from the provided data; embedded, appliance, or MediaTek-based systems are the more plausible review targets.

Exploitation context

The source bundle does not cite active exploitation, and KEV is false. The CVSS vector indicates local access with low privileges is required. No public exploit details are provided in the bundle.

Researcher notes

Evidence is narrow: the CVE describes a refcount leak fix, not a complete exploit scenario. Research should focus on reachability of mt2701_wm8960_machine_probe, driver enablement, device-tree requirements, and whether repeated probe paths can create meaningful resource exhaustion.

Mitigation direction

  • Apply vendor or distribution kernel updates containing the referenced stable fixes.
  • Prioritize affected MediaTek-based or embedded Linux systems using the ASoC driver.
  • If updates are unavailable, consult vendor guidance for supported mitigations.
  • Track kernel package versions against the CVE record and stable commits.

Validation and detection

  • Inventory Linux kernels against the affected versions in the CVE source.
  • Confirm whether the MediaTek mt2701_wm8960 ASoC driver is built or loaded.
  • Check vendor advisories for patched package versions or backports.
  • Verify deployed kernels include one of the referenced stable fixes.
Prepared
Confidence
high
Sources
10

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-2022-49517 mapping review

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
5.5 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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
1ADP providers
9Source 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
5.5CVSS 3.1MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H1.83.6CISA-ADP

Vulnerability scoring details

Base CVSS 3.1 score

5.5Medium
CVSS 3.1 vector shape for CVE-2022-49517Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

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

CISA-ADPCISA ADP Vulnrichment
cvssV3_1other:ssvc

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux8625c1dbd87631572f8e2c05bc67736b73d6f02f, 8625c1dbd87631572f8e2c05bc67736b73d6f02f, 8625c1dbd87631572f8e2c05bc67736b73d6f02f, 8625c1dbd87631572f8e2c05bc67736b73d6f02f, 8625c1dbd87631572f8e2c05bc67736b73d6f02f, 8625c1dbd87631572f8e2c05bc67736b73d6f02f, 8625c1dbd87631572f8e2c05bc67736b73d6f02f, 8625c1dbd87631572f8e2c05bc67736b73d6f02funaffected
LinuxLinux4.12, 0, 4.14.283, 4.19.247, 5.4.198, 5.10.121, 5.15.46, 5.17.14, 5.18.3, 5.19affected
Weakness

CWE details

No CWE listed

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