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CVE Record

CVE-2022-49346: net: dsa: lantiq_gswip: Fix refcount leak in gswip_gphy_fw_list

In the Linux kernel, the following vulnerability has been resolved: net: dsa: lantiq_gswip: Fix refcount leak in gswip_gphy_fw_list Every iteration of for_each_available_child_of_node() decrements the reference count of the previous node. when breaking early from a for_each_available_child_of_node() loop, we need to explicitly call of_node_put() on the gphy_fw_np. Add missing of_node_put() to avoid 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-2022-49346 is a Linux kernel availability issue in the Lantiq GSWIP network switch driver. A local, low-privileged attacker could potentially trigger a reference-count leak that may degrade or deny service. The sources do not show data theft, integrity impact, or active exploitation.

Executive priority

Treat this as a moderate-priority availability risk for Linux-based network or embedded assets, not a broad internet-facing emergency. Patch through normal kernel or firmware maintenance, with faster handling for devices relying on Lantiq GSWIP switching.

Technical view

The flaw is a missing of_node_put() when breaking early from for_each_available_child_of_node() in gswip_gphy_fw_list. This leaks a device-tree node reference in the lantiq_gswip DSA driver. CVSS 3.1 is 5.5 with local attack vector, low complexity, low privileges, and high availability impact.

Likely exposure

Exposure is most likely on Linux systems or embedded devices running affected kernel versions and using the Lantiq GSWIP DSA driver path. Generic Linux hosts without this driver or relevant hardware are less likely to be exposed.

Exploitation context

The provided bundle lists KEV as false and contains no cited evidence of active exploitation or public weaponization. Impact is availability-focused and requires local access with low privileges, according to the CVSS vector.

Researcher notes

Evidence supports a kernel reference-count leak fix, not a remote code execution issue. The source bundle does not include a CWE, exploit details, or named mitigations beyond upstream stable fixes. Validation should focus on affected kernel lineage and driver reachability.

Mitigation direction

  • Inventory Linux kernels against the affected versions listed in the CVE source bundle.
  • Prioritize systems using Lantiq GSWIP or related DSA switch functionality.
  • Update to vendor-supported kernels containing the referenced stable kernel fixes.
  • If patching is delayed, monitor vendor guidance for supported mitigations.
  • Track affected embedded firmware images that bundle their own Linux kernels.

Validation and detection

  • Check running kernel versions on potentially affected Linux and embedded systems.
  • Confirm whether the lantiq_gswip driver is built, loaded, or used by target hardware.
  • Verify vendor kernel changelogs include the referenced stable fix commits.
  • Regression-test networking behavior after kernel or firmware updates.
  • Document systems confirmed unaffected because the driver or hardware path is absent.
Prepared
Confidence
high
Sources
8

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.

ATT&CK lookup starting points

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CVE-2022-49346 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
7Source 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-2022-49346Attack 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
LinuxLinux14fceff4771e51b23b4485b575cf9e5b3414b89b, 14fceff4771e51b23b4485b575cf9e5b3414b89b, 14fceff4771e51b23b4485b575cf9e5b3414b89b, 14fceff4771e51b23b4485b575cf9e5b3414b89b, 14fceff4771e51b23b4485b575cf9e5b3414b89b, 14fceff4771e51b23b4485b575cf9e5b3414b89bunaffected
LinuxLinux4.20, 0, 5.4.198, 5.10.122, 5.15.47, 5.17.15, 5.18.4, 5.19affected
Weakness

CWE details

No CWE listed

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