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CVE Record

CVE-2021-47532: drm/msm/devfreq: Fix OPP refcnt leak

In the Linux kernel, the following vulnerability has been resolved: drm/msm/devfreq: Fix OPP refcnt leak

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

This CVE is a Linux kernel bug in the MSM/Qualcomm graphics devfreq code. The public record describes an OPP reference-count leak, which can affect kernel resource handling on systems using that driver. No CVSS score, impact details, or active exploitation evidence are provided in the source bundle.

Executive priority

Handle through routine kernel maintenance unless the organization operates Qualcomm/MSM-based Linux fleets. Escalate priority if affected devices are internet-exposed, hard to patch, or safety-critical, because impact details are incomplete.

Technical view

The issue is in Linux kernel drm/msm/devfreq and is described as fixing an OPP refcnt leak. The affected data points to Linux 5.15-era kernel versions, with stable kernel commits referenced as the resolution. The record does not document privilege requirements, attack vector, or concrete security impact.

Likely exposure

Exposure is likely limited to Linux systems running affected 5.15-era kernels with the MSM DRM/devfreq path present, typically Qualcomm/Adreno-based platforms. The provided sources do not prove exposure for all Linux deployments.

Exploitation context

The source bundle does not cite KEV listing, public exploitation, exploit availability, or weaponized use. Treat exploitation status as unknown, with no evidence of active exploitation in the provided materials.

Researcher notes

Evidence is sparse: the record only states an OPP reference-count leak and links stable commits. No CWE, CVSS, exploitability narrative, or attacker model is supplied. Analysis should stay tied to kernel version, driver presence, and vendor backport status.

Mitigation direction

  • Inventory Linux kernel versions on Qualcomm/MSM graphics systems.
  • Review vendor kernel advisories for CVE-2021-47532 applicability.
  • Update to a kernel containing the referenced stable fixes.
  • Prioritize embedded and mobile-derived Linux platforms using MSM DRM.
  • Document any vendor backport that includes the fix.

Validation and detection

  • Check whether deployed kernels are in the affected 5.15-era range.
  • Confirm whether the MSM DRM/devfreq driver is built or loaded.
  • Verify vendor kernel changelogs include the referenced stable commits.
  • Record patched kernel versions in asset management.
  • Monitor CVE and vendor records for added severity details.
Prepared
Confidence
medium
Sources
4

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

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

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CVE-2021-47532 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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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
2ADP providers
3Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: noTechnical Impact: partial

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.

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
other:ssvc
CVECVE Program Container

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux9bc95570175a7fbca29d86d22c54bbf399f4ad5a, 9bc95570175a7fbca29d86d22c54bbf399f4ad5aunaffected
LinuxLinux5.15, 0, 5.15.7, 5.16affected
Weakness

CWE details

No CWE listed

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