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CVE Record

CVE-2022-50327: ACPI: processor: idle: Check acpi_fetch_acpi_dev() return value

In the Linux kernel, the following vulnerability has been resolved: ACPI: processor: idle: Check acpi_fetch_acpi_dev() return value The return value of acpi_fetch_acpi_dev() could be NULL, which would cause a NULL pointer dereference to occur in acpi_device_hid(). [ rjw: Subject and changelog edits, added empty line after if () ]

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 bug in ACPI processor idle handling. If a kernel ACPI lookup unexpectedly returns nothing, the code could dereference a null pointer and crash affected systems. Sources do not provide CVSS, attack prerequisites, or confirmed exploitation, so business urgency depends on where affected kernel versions are deployed.

Executive priority

Handle through normal kernel patch governance unless vendor guidance raises severity. There is no provided CVSS score or confirmed exploitation, but kernel null dereferences can affect system availability and should not be ignored on critical Linux infrastructure.

Technical view

The fix adds return-value checking around acpi_fetch_acpi_dev() before use by acpi_device_hid(), preventing a NULL pointer dereference in ACPI processor idle code. The source bundle lists Linux kernel ranges as affected and stable kernel commits as references, but does not document privilege requirements, reachable paths, or crash impact beyond the NULL dereference.

Likely exposure

Exposure is limited to systems running affected Linux kernel versions or distributions that ship them, especially where ACPI processor idle code is active. The bundle lists fixed stable kernel references and a Debian LTS advisory, but no CPEs or distribution version matrix beyond those sources.

Exploitation context

The source bundle does not show CISA KEV listing, public exploitation, exploit code, or weaponized details. Treat this as a potential reliability or availability issue until vendor advisories define impact, prerequisites, and whether untrusted users can trigger the path.

Researcher notes

Evidence is sparse. The public description identifies a NULL pointer dereference caused by unchecked acpi_fetch_acpi_dev() return value. The commit references are the main remediation evidence. The bundle does not establish attacker control, local versus remote reachability, or confidentiality/integrity impact.

Mitigation direction

  • Check vendor kernel advisories for affected distribution packages.
  • Prioritize supported kernel updates containing the referenced stable fixes.
  • Track Debian LTS guidance if Debian long-term support systems are in scope.
  • Avoid inventing workarounds; use vendor-published mitigation guidance only.

Validation and detection

  • Inventory Linux kernel versions across servers, endpoints, and appliances.
  • Compare deployed kernels against vendor fixed package versions.
  • Review whether ACPI processor idle functionality is enabled on affected systems.
  • Confirm patched systems are running the updated kernel after reboot.
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

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CVE-2022-50327 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
8Source 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
LinuxLinuxa36a7fecfe6071732075ad5aa31196adce13181b, a36a7fecfe6071732075ad5aa31196adce13181b, a36a7fecfe6071732075ad5aa31196adce13181b, a36a7fecfe6071732075ad5aa31196adce13181b, a36a7fecfe6071732075ad5aa31196adce13181b, a36a7fecfe6071732075ad5aa31196adce13181bunaffected
LinuxLinux4.8, 0, 5.4.297, 5.10.241, 5.15.190, 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.