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CVE Record

CVE-2021-32078: An Out-of-Bounds Read was discovered in arch/arm/mach-footbridge/personal-pci.c in the Linux kernel through...

An Out-of-Bounds Read was discovered in arch/arm/mach-footbridge/personal-pci.c in the Linux kernel through 5.12.11 because of the lack of a check for a value that shouldn't be negative, e.g., access to element -2 of an array, aka CID-298a58e165e4.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

CVE-2021-32078 is an out-of-bounds read in Linux kernel ARM Footbridge personal PCI code. The provided sources say Linux kernels through 5.12.11 are affected, but do not provide CVSS, impact scope, or confirmed exploit activity. Treat exposure as configuration-dependent and verify whether affected ARM Footbridge code exists in your estate.

Executive priority

Do not treat this as a broad emergency from the provided data alone. Assign vulnerability-management review priority to kernel or appliance teams, focused on old Linux kernels and ARM Footbridge-specific exposure. Escalate only if critical business systems match the affected code path.

Technical view

The flaw is in arch/arm/mach-footbridge/personal-pci.c. Missing validation allowed a value that should not be negative, leading to access before an array element, such as index -2. The CVE references upstream Linux commit 298a58e165e447ccfaae35fe9f651f9d7e15166f as the associated fix record.

Likely exposure

Likely limited to systems using affected Linux kernel versions and the ARM Footbridge personal PCI code path. The bundle lists Linux through 5.12.11 but gives no CPEs, vendor matrix, or distribution package status. NetApp published an advisory, so appliance exposure should be checked against vendor guidance.

Exploitation context

The bundle does not cite active exploitation, and KEV status is false. No public exploit status, required privileges, trigger conditions, or reachable attack surface are established in the provided evidence. Avoid assuming internet-exploitable risk without environment-specific validation.

Researcher notes

Evidence is sparse: no CVSS, no CWE, no CPEs, and no exploit details are provided. The strongest anchors are the CVE description and upstream commit reference. Validation should focus on code-path reachability, downstream backports, and vendor advisory mapping rather than generic Linux presence.

Mitigation direction

  • Apply vendor or distribution kernel updates that include the referenced upstream fix.
  • For self-built kernels, verify inclusion of commit 298a58e165e447ccfaae35fe9f651f9d7e15166f.
  • Review NetApp advisory applicability for managed storage or appliance environments.
  • Deprioritize systems that cannot execute the ARM Footbridge personal PCI path.
  • Track vendor advisories if your distribution has not mapped package versions.

Validation and detection

  • Inventory Linux kernel versions and flag versions through 5.12.11.
  • Identify whether ARM Footbridge support is enabled or present in deployed kernels.
  • Check vendor package changelogs for the referenced upstream commit ID.
  • Review NetApp advisory status for any affected product dependencies.
  • Document systems where exposure cannot be determined from available evidence.
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-2021-32078 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
n/an/an/aListed
Weakness

CWE details

No CWE listed

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