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CVE Record

CVE-2024-36945: net/smc: fix neighbour and rtable leak in smc_ib_find_route()

In the Linux kernel, the following vulnerability has been resolved: net/smc: fix neighbour and rtable leak in smc_ib_find_route() In smc_ib_find_route(), the neighbour found by neigh_lookup() and rtable resolved by ip_route_output_flow() are not released or put before return. It may cause the refcount leak, so fix it.

HighCVSS 7.5Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

A Linux kernel networking function fails to release routing and neighbour references. Repeated use may consume kernel resources and eventually disrupt service availability. The supplied assessment rates this high severity, but it provides no evidence of data theft, modification, or active exploitation.

Executive priority

Treat as a high-priority availability issue on exposed or SMC-enabled Linux systems. Establish actual fleet exposure before emergency action; prioritize supported kernel updates where affected code is present. There is no supplied evidence of active exploitation.

Technical view

The flaw is a reference-count leak in smc_ib_find_route(). Objects returned by neigh_lookup() and ip_route_output_flow() were not released before return. The kernel stable commits correct the cleanup. The supplied CVSS 3.1 score is 7.5, with availability impact only.

Likely exposure

Exposure is limited to Linux systems containing the affected SMC networking code, especially where the relevant route-discovery path is exercised. Exact distribution, appliance, and configuration exposure cannot be established from the supplied version data, which is ambiguous.

Exploitation context

The bundle marks this CVE as absent from KEV and cites no active exploitation or public exploit. Network reachability appears in the supplied CVSS vector, but the sources do not explain practical triggering conditions or demonstrate reliable remote denial of service.

Researcher notes

The affected-version representation is internally unclear, including a duplicated commit identifier and an unusual version list. Validate ancestry and backports against vendor kernels rather than relying solely on version strings. The bundle provides fixes but no triggering analysis, proof of exploitation, or confirmed attack telemetry.

Mitigation direction

  • Apply a vendor-supported kernel update incorporating the relevant stable fix.
  • Check Linux distribution and appliance advisories for corrected package versions.
  • Prioritize systems using SMC networking or showing unexplained resource exhaustion.
  • Follow NetApp guidance separately for potentially affected NetApp products.

Validation and detection

  • Inventory Linux kernel versions across servers, appliances, and embedded systems.
  • Determine whether SMC networking is present and operationally used.
  • Compare installed kernels with vendor advisories and the four referenced stable commits.
  • After updating, confirm the running kernel is the intended corrected build.
  • Monitor affected systems for recurring resource exhaustion or availability degradation.
Prepared
Confidence
medium
Sources
7

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

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CVE-2024-36945 mapping review

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Vulnerability profileCVE Program record
Severity
High
CVSS
7.5 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:L/PR:N/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
2ADP providers
6Source 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
7.5CVSS 3.1HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H3.93.6Linux

Vulnerability scoring details

Base CVSS 3.1 score

7.5High
CVSS 3.1 vector shape for CVE-2024-36945Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:L/PR:N/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-ADPADP Container
other:ssvc
CVECVE Program Container

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinuxe5c4744cfb598f98672f8d21d59ef2c1fa9c9b5f, e5c4744cfb598f98672f8d21d59ef2c1fa9c9b5f, e5c4744cfb598f98672f8d21d59ef2c1fa9c9b5f, e5c4744cfb598f98672f8d21d59ef2c1fa9c9b5funaffected
LinuxLinux5.16, 0, 6.1.91, 6.6.31, 6.8.10, 6.9affected
Weakness

CWE details

No CWE listed

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