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CVE Record

CVE-2022-50888: remoteproc: qcom: q6v5: Fix potential null-ptr-deref in q6v5_wcss_init_mmio()

In the Linux kernel, the following vulnerability has been resolved: remoteproc: qcom: q6v5: Fix potential null-ptr-deref in q6v5_wcss_init_mmio() q6v5_wcss_init_mmio() will call platform_get_resource_byname() that may fail and return NULL. devm_ioremap() will use res->start as input, which may causes null-ptr-deref. Check the ret value of platform_get_resource_byname() to avoid the null-ptr-deref.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2022-50888 is a Linux kernel bug in a Qualcomm remote processor driver. If a required hardware resource is missing, the driver may dereference a null pointer and crash. The public record does not show remote exploitation, privilege escalation, or data theft. Business urgency is mainly availability risk on affected Linux systems using this Qualcomm WCSS path.

Executive priority

Treat as a targeted kernel stability issue, not a broad internet emergency. Prioritize affected Qualcomm-based products where downtime matters, especially embedded or network devices. Track vendor kernel updates and fold remediation into normal maintenance unless the device has a history of crashes or high availability requirements.

Technical view

The issue is in q6v5_wcss_init_mmio() under remoteproc qcom q6v5. platform_get_resource_byname() can return NULL, but the code passed res->start into devm_ioremap(), causing a potential null pointer dereference. Stable kernel commits add a return-value check. CVSS and CWE are not provided in the source bundle.

Likely exposure

Exposure appears limited to Linux kernels using the Qualcomm q6v5 WCSS remoteproc driver on relevant Qualcomm hardware. Generic servers without this driver or hardware are unlikely to be exposed. The CVE record lists Linux versions including 5.13, 5.15.86, 6.0.16, 6.1.2, and 6.2 as affected.

Exploitation context

No cited source reports active exploitation, public exploit code, or inclusion in CISA KEV. The condition depends on a missing platform resource during driver initialization. Practical impact is likely a local/device-specific denial of service or failed device initialization, based on the null pointer dereference described.

Researcher notes

The public record is sparse: no CVSS, no CWE, and no exploitability analysis. The root cause is unchecked failure from platform_get_resource_byname() before devm_ioremap(). Analysis should focus on kernel configuration, device tree resource definitions, and whether downstream vendor trees include one of the stable fixes.

Mitigation direction

  • Update to a kernel build that includes the referenced stable commits.
  • Use distribution or device-vendor kernel advisories for exact fixed package versions.
  • Prioritize Qualcomm-based embedded, networking, or Android-derived Linux platforms using q6v5 WCSS.
  • If updates are unavailable, ask the vendor for supported mitigation guidance.

Validation and detection

  • Inventory Linux assets running Qualcomm-based kernels or boards.
  • Check whether the qcom q6v5 WCSS remoteproc driver is built or enabled.
  • Compare running kernel source or package changelog against the referenced stable commits.
  • Confirm vendor advisories identify the CVE or the q6v5_wcss_init_mmio 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.

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CVE-2022-50888 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
0Timeline events
0ADP providers
5Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux0af65b9b915e52019aee91db3e1f8b39a7ec8d08, 0af65b9b915e52019aee91db3e1f8b39a7ec8d08, 0af65b9b915e52019aee91db3e1f8b39a7ec8d08, 0af65b9b915e52019aee91db3e1f8b39a7ec8d08unaffected
LinuxLinux5.13, 0, 5.15.86, 6.0.16, 6.1.2, 6.2affected
Weakness

CWE details

No CWE listed

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