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CVE Record

CVE-2022-48881: platform/x86/amd: Fix refcount leak in amd_pmc_probe

In the Linux kernel, the following vulnerability has been resolved: platform/x86/amd: Fix refcount leak in amd_pmc_probe pci_get_domain_bus_and_slot() takes reference, the caller should release the reference by calling pci_dev_put() after use. Call pci_dev_put() in the error path to fix this.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

This Linux kernel issue is a resource-management bug in AMD platform power-management probing. A reference acquired for a PCI device was not released on an error path. The public record does not state a direct security impact, CVSS score, or active exploitation.

Executive priority

Handle as routine kernel hygiene unless your Linux fleet includes affected AMD systems or a vendor advisory assigns higher severity. There is no supplied evidence of active exploitation or business-disruptive impact.

Technical view

In platform/x86/amd, amd_pmc_probe calls pci_get_domain_bus_and_slot(), which increments a PCI device reference. On an error path, the code failed to call pci_dev_put(), causing a reference leak. Kernel stable commits add the missing release.

Likely exposure

Exposure appears limited to Linux systems running affected kernel builds with the AMD PMC platform driver path present. The supplied data lists Linux kernel versions including 5.18, 6.1.7, and 6.2, but exact distribution package exposure should be verified with vendor advisories.

Exploitation context

The source bundle shows no KEV listing and provides no evidence of active exploitation. The public description frames this as a refcount leak fix, not a documented remote or privilege-escalation exploit path.

Researcher notes

The key behavior is a missing pci_dev_put() after pci_get_domain_bus_and_slot() on the amd_pmc_probe error path. Public evidence is narrow: it establishes the code defect and fix, but not exploitability, impact scope, or attacker prerequisites.

Mitigation direction

  • Update to kernel or distribution packages containing the referenced stable fixes.
  • Check Linux distribution advisories for package-specific affected and fixed versions.
  • Prioritize normal kernel maintenance unless vendor guidance raises severity.
  • Track this CVE in vulnerability management until patched or marked not applicable.

Validation and detection

  • Inventory Linux kernel versions across AMD-based systems.
  • Confirm whether affected systems include the AMD PMC platform driver path.
  • Map installed kernel packages against distribution advisories for CVE-2022-48881.
  • Verify remediated systems include the referenced stable kernel fix commits.
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

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CVE-2022-48881 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
3Timeline events
1ADP 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

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux3d7d407dfb05b257e15cb0c6b056428a4a8c2e5d, 3d7d407dfb05b257e15cb0c6b056428a4a8c2e5dunaffected
LinuxLinux5.18, 0, 6.1.7, 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.