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CVE Record

CVE-2022-50247: usb: xhci-mtk: fix leakage of shared hcd when fail to set wakeup irq

In the Linux kernel, the following vulnerability has been resolved: usb: xhci-mtk: fix leakage of shared hcd when fail to set wakeup irq Can not set the @shared_hcd to NULL before decrease the usage count by usb_put_hcd(), this will cause the shared hcd not released.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

This is a Linux kernel cleanup bug in the MediaTek xHCI USB host controller driver. If wakeup IRQ setup fails, a shared host controller reference may not be released. The public record does not provide CVSS, CWE, exploit impact, or evidence of active exploitation.

Executive priority

Treat this as a targeted kernel maintenance item, not an emergency, unless critical MediaTek-based devices run affected kernels. The missing severity score and absent exploitation evidence lower urgency, but embedded fleet visibility may be limited.

Technical view

The xhci-mtk error path set shared_hcd to NULL before usb_put_hcd() reduced the reference count, preventing the shared HCD from being released. Kernel stable commits are listed as the remediation source. The supplied data identifies affected Linux kernel versions but lacks distro-specific package mapping.

Likely exposure

Exposure is most likely on Linux systems using the MediaTek xHCI USB host controller driver, commonly embedded or MediaTek-based platforms. Systems without this hardware or driver path are less likely exposed, but exact impact requires kernel and vendor mapping.

Exploitation context

The source bundle marks KEV as false and provides no cited evidence of active exploitation, public exploit code, or weaponized attacks. The described issue is a resource leak in a kernel driver failure path, not a documented remote compromise vector.

Researcher notes

Evidence is limited to the CVE description and four kernel stable commit references. There is no CVSS vector, CWE, privilege requirement, attack complexity, or tested affected distro list in the provided bundle.

Mitigation direction

  • Review vendor kernel advisories for CVE-2022-50247 applicability.
  • Update to a kernel build containing the listed stable fixes.
  • Prioritize MediaTek-based Linux devices and embedded fleets.
  • Track distro backports instead of relying only on upstream version numbers.

Validation and detection

  • Inventory Linux kernel versions across MediaTek-based systems.
  • Confirm whether xhci-mtk is built or loaded on affected devices.
  • Map deployed kernels to vendor advisories or stable fix commits.
  • Check change logs for the shared_hcd wakeup IRQ fix.
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

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-2022-50247 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
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
LinuxLinux04284eb74e0c350be5e75eda178b97063343af13, 04284eb74e0c350be5e75eda178b97063343af13, 04284eb74e0c350be5e75eda178b97063343af13, 04284eb74e0c350be5e75eda178b97063343af13unaffected
LinuxLinux5.13, 0, 5.15.86, 6.0.16, 6.1.2, 6.2affected
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.