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CVE Record

CVE-2021-47609: firmware: arm_scpi: Fix string overflow in SCPI genpd driver

In the Linux kernel, the following vulnerability has been resolved: firmware: arm_scpi: Fix string overflow in SCPI genpd driver Without the bound checks for scpi_pd->name, it could result in the buffer overflow when copying the SCPI device name from the corresponding device tree node as the name string is set at maximum size of 30. Let us fix it by using devm_kasprintf so that the string buffer is allocated dynamically.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

CVE-2021-47609 is a Linux kernel bug in the ARM SCPI power-domain driver. A device-tree name could exceed a fixed 30-byte buffer and overflow memory. The sources do not provide CVSS, CWE, impact proof, or active exploitation evidence.

Executive priority

Treat this as a targeted kernel maintenance issue, not a confirmed emergency. Prioritize affected ARM/Linux platforms and custom kernels, especially embedded or appliance environments where kernel updates lag.

Technical view

The vulnerable arm_scpi SCPI genpd code copied a device-tree node name into scpi_pd->name without bounds checks. The upstream fix replaces the fixed-size string handling with dynamically allocated formatting via devm_kasprintf. The issue is relevant to Linux kernels and ARM SCPI generic power-domain usage.

Likely exposure

Exposure appears limited to Linux systems using the ARM SCPI generic power-domain driver with affected kernel code. General Linux servers without this driver or relevant device-tree configuration are less likely exposed, but kernel vendor backports must be checked.

Exploitation context

The provided sources do not show public exploitation, CISA KEV listing, exploit maturity, or required attacker position. The bug is a kernel memory-safety issue, but practical exploitability is not established by the bundle.

Researcher notes

Evidence is narrow but concrete: the flaw and fix are described in kernel stable references. Missing data includes CVSS, CWE, exploitability details, and platform-specific advisories. Validate exposure through kernel configuration, device-tree use, and vendor backport mapping.

Mitigation direction

  • Update to a kernel containing the relevant stable fix or vendor backport.
  • Check Linux distribution advisories and kernel changelogs for CVE-2021-47609 coverage.
  • Prioritize ARM platforms using SCPI generic power domains.
  • Avoid direct wrangler-style assumptions; validate vendor kernel status first.

Validation and detection

  • Inventory deployed Linux kernel versions and vendor package builds.
  • Check whether ARM SCPI generic power-domain support is present or enabled.
  • Compare kernel source or package changelog against the listed stable commits.
  • Record unsupported or custom kernels for manual vendor review.
Prepared
Confidence
medium
Sources
9

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-2021-47609 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
8Source 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

CVECVE Program Container
CISA-ADPCISA ADP Vulnrichment
other:ssvc

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux8bec4337ad4023b26de35d3b0c3a3b2735ffc5c7, 8bec4337ad4023b26de35d3b0c3a3b2735ffc5c7, 8bec4337ad4023b26de35d3b0c3a3b2735ffc5c7, 8bec4337ad4023b26de35d3b0c3a3b2735ffc5c7, 8bec4337ad4023b26de35d3b0c3a3b2735ffc5c7, 8bec4337ad4023b26de35d3b0c3a3b2735ffc5c7, 8bec4337ad4023b26de35d3b0c3a3b2735ffc5c7unaffected
LinuxLinux4.8, 0, 4.9.294, 4.14.259, 4.19.222, 5.4.168, 5.10.88, 5.15.11, 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.