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CVE Record

CVE-2024-43872: RDMA/hns: Fix soft lockup under heavy CEQE load

In the Linux kernel, the following vulnerability has been resolved: RDMA/hns: Fix soft lockup under heavy CEQE load CEQEs are handled in interrupt handler currently. This may cause the CPU core staying in interrupt context too long and lead to soft lockup under heavy load. Handle CEQEs in BH workqueue and set an upper limit for the number of CEQE handled by a single call of work handler.

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 availability issue in the RDMA/hns driver. Under heavy CEQE processing, a CPU can spend too long in interrupt context and trigger a soft lockup. The main business risk is service disruption on affected Linux systems using this driver path.

Executive priority

Treat this as an availability risk for specialized Linux infrastructure, not a broad internet-facing emergency based on the provided evidence. Prioritize affected RDMA/hns systems and align remediation with normal kernel maintenance unless local service impact is observed.

Technical view

The kernel fix moves CEQE handling from the interrupt handler into a bottom-half workqueue and limits how many CEQEs one worker call processes. The CVE data lists Linux kernel versions as affected but provides no CVSS, CWE, or distribution package mapping.

Likely exposure

Exposure is most likely on Linux systems using the RDMA/hns driver under heavy CEQE load. General Linux hosts without that driver path or workload are less likely to be affected, but the source bundle does not provide precise deployment criteria.

Exploitation context

The source bundle does not show active exploitation, and the CVE is not listed as KEV. The described condition is workload-triggered soft lockup, not a documented remote code execution path.

Researcher notes

Evidence is limited to the CVE record and kernel stable references. No CVSS, CWE, exploit report, or vendor package matrix is provided. The key technical behavior is excessive interrupt-context CEQE processing causing soft lockup under heavy load.

Mitigation direction

  • Update to a kernel or distribution release containing the referenced stable fixes.
  • Check Linux distribution advisories for package-specific fixed versions.
  • Prioritize systems using RDMA/hns or heavy RDMA workloads.
  • If updates are unavailable, reduce or isolate heavy affected workloads where practical.

Validation and detection

  • Inventory Linux kernel versions across RDMA-capable systems.
  • Confirm whether the RDMA/hns driver is present, loaded, or built in.
  • Review vendor changelogs for CVE-2024-43872 or the referenced commit IDs.
  • Check kernel logs for soft lockup events during RDMA workload spikes.
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-2024-43872 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
LinuxLinuxa5073d6054f75d7c94b3354206eec4b804d2fbd4, a5073d6054f75d7c94b3354206eec4b804d2fbd4unaffected
LinuxLinux4.16, 0, 6.10.3, 6.11affected
Weakness

CWE details

No CWE listed

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