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CVE Record

CVE-2022-49752: device property: fix of node refcount leak in fwnode_graph_get_next_endpoint()

In the Linux kernel, the following vulnerability has been resolved: device property: fix of node refcount leak in fwnode_graph_get_next_endpoint() The 'parent' returned by fwnode_graph_get_port_parent() with refcount incremented when 'prev' is not NULL, it needs be put when finish using it. Because the parent is const, introduce a new variable to store the returned fwnode, then put it before returning from fwnode_graph_get_next_endpoint().

MediumCVSS 5.5Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

This Linux kernel bug can leak internal references while handling device-property graph endpoints. The stated impact is availability only: a local, low-privileged user could potentially contribute to a denial of service. The provided sources do not indicate data theft, data modification, or confirmed exploitation.

Executive priority

Handle through normal kernel patch governance, with higher priority for shared servers, appliances, or environments where local users can run code. There is no source-backed evidence of remote exploitation or active attacks.

Technical view

The issue is in fwnode_graph_get_next_endpoint(). When prev is non-NULL, fwnode_graph_get_port_parent() returns parent with an incremented refcount, but the function failed to release it before returning. Stable kernel commits correct the missing put path.

Likely exposure

Exposure is limited to affected Linux kernel versions and builds containing this device property code path. The bundle lists Linux 5.15, 5.15.91, 6.1.9, and 6.2 as affected-version markers, but distribution backport status must be verified separately.

Exploitation context

CVSS indicates local access, low complexity, low privileges, no user interaction, unchanged scope, and high availability impact. CISA KEV is false in the bundle, and no cited source claims active exploitation.

Researcher notes

Evidence points to a reference-count leak, not memory corruption or privilege escalation. The source bundle lacks CWE mapping and distribution-specific fix metadata, so exposure validation should focus on kernel provenance and vendor backports.

Mitigation direction

  • Update to a vendor-supported kernel containing the referenced stable fixes.
  • Check distribution advisories for backported fixes before relying on version numbers alone.
  • Restrict unnecessary local user access on systems awaiting kernel maintenance.
  • Prioritize shared or multi-user Linux hosts where local denial of service matters most.

Validation and detection

  • Inventory running Linux kernel versions across affected systems.
  • Confirm whether vendor kernel packages include the referenced stable commits.
  • Track distribution security advisories for CVE-2022-49752 status.
  • Validate that patched test systems remain stable after kernel update.
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.

ATT&CK lookup starting points

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CVE-2022-49752 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
Medium
CVSS
5.5 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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.

1CVSS vectors
3Timeline events
1ADP providers
5Source links

SSVC decision data

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

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
5.5CVSS 3.1MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H1.83.6CISA-ADP

Vulnerability scoring details

Base CVSS 3.1 score

5.5Medium
CVSS 3.1 vector shape for CVE-2022-49752Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

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
cvssV3_1other:ssvc

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux91b31ca76300fd36d5049c5879e68dfb3edc7a5c, b5b41ab6b0c1bb70fe37a0d193006c969e3b5909, b5b41ab6b0c1bb70fe37a0d193006c969e3b5909, b5b41ab6b0c1bb70fe37a0d193006c969e3b5909unaffected
LinuxLinux5.15, 0, 5.15.91, 6.1.9, 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.