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CVE Record

CVE-2022-50154: PCI: mediatek-gen3: Fix refcount leak in mtk_pcie_init_irq_domains()

In the Linux kernel, the following vulnerability has been resolved: PCI: mediatek-gen3: Fix refcount leak in mtk_pcie_init_irq_domains() of_get_child_by_name() returns a node pointer with refcount incremented, so we should use of_node_put() on it when we don't need it anymore. Add missing of_node_put() to avoid refcount leak.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysislow

Security readout for executives and security teams

Plain-English summary

CVE-2022-50154 is a Linux kernel resource-management bug in the MediaTek Gen3 PCIe driver. The driver failed to release a device-tree node reference after use, causing a reference-count leak. Based on the supplied sources, this is not described as remotely exploitable and is not listed in KEV.

Executive priority

Treat as routine patch-cycle work unless MediaTek-based Linux appliances are business-critical or stability-sensitive. There is no supplied evidence of active exploitation, but kernel fixes should still be tracked because embedded assets often patch slowly.

Technical view

The issue is in mtk_pcie_init_irq_domains(). of_get_child_by_name() increments the node reference count, but the affected code did not call of_node_put() when finished. The kernel fix adds the missing release to prevent a refcount leak in PCI interrupt-domain initialization for the mediatek-gen3 driver.

Likely exposure

Exposure is most likely on Linux systems using MediaTek Gen3 PCIe hardware or kernels that include the affected driver and affected version ranges. Generic servers and cloud workloads are less likely exposed unless they run this platform-specific kernel code. Exact distribution impact requires vendor mapping.

Exploitation context

The provided sources do not report active exploitation, public exploit use, or KEV listing. The evidence describes a reference-count leak, not a privilege escalation or remote code execution path. Business risk is mainly operational stability on affected MediaTek-based systems.

Researcher notes

Focus validation on platform reachability and kernel lineage. The key technical indicator is whether the kernel tree includes the stable commits fixing the missing of_node_put() in mtk_pcie_init_irq_domains(). Source evidence does not provide CVSS, CWE, exploitability, or distribution-specific fixed versions.

Mitigation direction

  • Update affected Linux kernels to versions containing the referenced stable fixes.
  • Check distribution or device-vendor advisories for backported fixes.
  • Prioritize MediaTek-based embedded, router, appliance, or ARM platforms.
  • Track kernel package updates through normal patch management.
  • Avoid inventing compensating controls without vendor confirmation.

Validation and detection

  • Inventory Linux kernel versions across MediaTek-based assets.
  • Confirm whether the mediatek-gen3 PCIe driver is present or enabled.
  • Check vendor kernel changelogs for the referenced stable commits.
  • Verify patched source includes the missing of_node_put() fix.
  • Run standard regression testing after kernel updates.
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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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
0ADP providers
5Source links

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.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux814cceebba9b7d1306b8d49587ffb0e81f7b73af, 814cceebba9b7d1306b8d49587ffb0e81f7b73af, 814cceebba9b7d1306b8d49587ffb0e81f7b73af, 814cceebba9b7d1306b8d49587ffb0e81f7b73afunaffected
LinuxLinux5.13, 0, 5.15.61, 5.18.18, 5.19.2, 6.0affected
Weakness

CWE details

No CWE listed

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