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CVE Record

CVE-2022-50106: powerpc/cell/axon_msi: Fix refcount leak in setup_msi_msg_address

In the Linux kernel, the following vulnerability has been resolved: powerpc/cell/axon_msi: Fix refcount leak in setup_msi_msg_address of_get_next_parent() returns a node pointer with refcount incremented, we should use of_node_put() on it when not need anymore. Add missing of_node_put() in the error path 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-2022-50106 is a Linux kernel bug in a PowerPC Cell Axon MSI code path. An error path fails to release a device-tree node reference, causing a refcount leak. The public record does not describe remote code execution or active exploitation. Priority is highest for specialized PowerPC deployments running affected kernels.

Executive priority

Treat as low priority unless your organization operates affected PowerPC Linux systems. There is no cited active exploitation, no CVSS score, and the issue is narrow, but unsupported specialized systems should still be updated through normal patch governance.

Technical view

The flaw is in powerpc/cell/axon_msi setup_msi_msg_address. of_get_next_parent() increments a node reference count, but the error path omitted of_node_put(), leaking the reference. Kernel stable commits add the missing release. CVSS, CWE, and detailed impact are not provided in the source bundle.

Likely exposure

Exposure appears limited to Linux systems using the PowerPC Cell Axon MSI code path on affected kernel versions. Typical x86 or ARM Linux fleets are unlikely to reach this driver-specific path, but kernel inventories should confirm architecture, version, and distribution backports.

Exploitation context

The supplied sources do not report known exploitation, and KEV status is false. The evidence describes a resource/reference leak in an error path, with no public exploit details, attack prerequisites, or demonstrated security impact beyond the kernel fix description.

Researcher notes

The record is sparse: no CVSS vector, CWE, exploitability discussion, or runtime trigger details are provided. Analysis should stay anchored to the kernel commit message: missing of_node_put() after of_get_next_parent() in an error path. Validate fixes through downstream distro backports, not only upstream version numbers.

Mitigation direction

  • Apply a vendor or distribution kernel update containing the referenced stable fix.
  • Prioritize PowerPC Cell or Axon MSI systems before general Linux fleets.
  • Check vendor advisories for backported fixes and supported kernel package versions.
  • Plan normal maintenance if no exposed PowerPC systems are present.

Validation and detection

  • Inventory Linux kernel versions and system architectures across the fleet.
  • Identify hosts using PowerPC Cell or Axon MSI-related kernel support.
  • Compare installed kernels with vendor fixed package guidance.
  • Review kernel package changelogs for CVE-2022-50106 or the stable commit references.
Prepared
Confidence
medium
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

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CVE-2022-50106 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
0ADP providers
9Source 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
LinuxLinuxce21b3c9648ae55181787bf25ee00cf91dfd5c91, ce21b3c9648ae55181787bf25ee00cf91dfd5c91, ce21b3c9648ae55181787bf25ee00cf91dfd5c91, ce21b3c9648ae55181787bf25ee00cf91dfd5c91, ce21b3c9648ae55181787bf25ee00cf91dfd5c91, ce21b3c9648ae55181787bf25ee00cf91dfd5c91, ce21b3c9648ae55181787bf25ee00cf91dfd5c91, ce21b3c9648ae55181787bf25ee00cf91dfd5c91unaffected
LinuxLinux2.6.23, 0, 4.14.291, 4.19.256, 5.4.211, 5.10.137, 5.15.61, 5.18.18, 5.19.2, 6.0affected
Weakness

CWE details

No CWE listed

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