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CVE Record

CVE-2022-50153: usb: host: Fix refcount leak in ehci_hcd_ppc_of_probe

In the Linux kernel, the following vulnerability has been resolved: usb: host: Fix refcount leak in ehci_hcd_ppc_of_probe of_find_compatible_node() returns a node pointer with refcount incremented, we should use of_node_put() on it when done. 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-2022-50153 is a Linux kernel resource-management bug in a USB host driver path. A device-tree node reference was not released after use, causing a reference-count leak. The provided sources do not show active exploitation, impact severity, or a remote attack scenario.

Executive priority

Handle through normal kernel patch management unless the environment depends on affected PowerPC USB host paths. There is no provided evidence of exploitation, but kernel hygiene matters because resource leaks can affect stability over time.

Technical view

The fix adds missing of_node_put() after of_find_compatible_node() in ehci_hcd_ppc_of_probe. Affected Linux kernel versions are listed in the CVE source bundle, with stable kernel commits published for multiple branches. No CVSS, CWE, exploitability detail, or distro-specific advisory is provided.

Likely exposure

Exposure appears limited to Linux systems running affected kernel versions where the EHCI PPC Open Firmware USB host probe path is relevant. Confirm exposure against the exact kernel build and vendor backports, because the bundle lists upstream kernel versions and commits, not distribution packages.

Exploitation context

The source bundle marks KEV as false and provides no cited evidence of active exploitation. The described issue is a kernel reference-count leak, not a documented remote code execution or privilege-escalation path in the supplied evidence.

Researcher notes

The key evidence is the upstream Linux fix for a missing of_node_put() after of_find_compatible_node(). Impact detail is sparse: no CVSS, CWE, exploit prerequisites, or observable failure mode are supplied beyond the reference-count leak.

Mitigation direction

  • Update affected Linux kernels to versions containing the referenced stable fixes.
  • Check distribution or appliance vendor advisories for backported kernel fixes.
  • Prioritize systems using PowerPC/Open Firmware USB host controller paths.
  • Track vendor guidance if packaged kernel status is unclear.

Validation and detection

  • Inventory Linux kernel versions across servers, appliances, and embedded systems.
  • Compare running kernels with vendor-fixed builds or referenced upstream stable commits.
  • Review kernel configuration and hardware platform relevance for EHCI PPC OF code.
  • Confirm vulnerability scanners account for vendor backports, not only version strings.
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-2022-50153 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
LinuxLinux796bcae7361c28cf825780f6f1aac9dd3411394e, 796bcae7361c28cf825780f6f1aac9dd3411394e, 796bcae7361c28cf825780f6f1aac9dd3411394e, 796bcae7361c28cf825780f6f1aac9dd3411394e, 796bcae7361c28cf825780f6f1aac9dd3411394e, 796bcae7361c28cf825780f6f1aac9dd3411394e, 796bcae7361c28cf825780f6f1aac9dd3411394e, 796bcae7361c28cf825780f6f1aac9dd3411394eunaffected
LinuxLinux2.6.29, 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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