CVE-2024-43872Network attack vector

Service interruption via unbounded CEQE interrupt handling

Published Aug 21, 2024 · Updated Aug 5, 2026

Denial of service in Linux kernel 4.16 through 6.10.2 allows remote attackers to cause a soft lockup under heavy HNS RoCE CEQE load. The HNS RoCE v2 completion-event handler drains CEQEs in interrupt context without bounding the work per invocation, allowing sustained event load to monopolize a CPU core. Reachability requires HNS RDMA hardware and enough CEQE load; the reported consequence is a soft lockup that interrupts service, not data access or modification.

CVSS severity7.5
High
EPSS probability0.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Linux kernel 4.16 through 6.10.2 allows remote attackers to cause a soft lockup under heavy HNS RoCE CEQE load. The HNS RoCE v2 completion-event handler drains CEQEs in interrupt context without bounding the work per invocation, allowing sustained event load to monopolize a CPU core. Reachability requires HNS RDMA hardware and enough CEQE load; the reported consequence is a soft lockup that interrupts service, not data access or modification.

The record

CVE
CVE-2024-43872
Published
Aug 21, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-667, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 21, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.16
  2. Affected versionversion=a5073d6054f75d7c94b3354206eec4b804d2fbd4 <06580b33c183c9f98e2a2ca96a86137179032c08
  3. Affected versionversion=a5073d6054f75d7c94b3354206eec4b804d2fbd4 <2fdf34038369c0a27811e7b4680662a14ada1d6b

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.16; version=a5073d6054f75d7c94b3354206eec4b804d2fbd4 <06580b33c183c9f98e2a2ca96a86137179032c08; version=a5073d6054f75d7c94b3354206eec4b804d2fbd4 <2fdf34038369c0a27811e7b4680662a14ada1d6b

Published CVSS scores

7.5Linux CNACVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-667Improper Locking
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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