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

> A soft lockup in the Linux kernel RDMA driver can cause a denial of service under heavy load by keeping the CPU in interrupt context too long.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 21 Aug 2024
- **Updated:** 5 Aug 2026
- **Also known as:** AZL-48477, AZL-48510, BELL-CVE-2024-43872, DEBIAN-CVE-2024-43872, GHSA-7j47-mxwc-g3xp, ROOT-OS-DEBIAN-11-CVE-2024-43872, ROOT-OS-DEBIAN-12-CVE-2024-43872, ROOT-OS-UBUNTU-2204-CVE-2024-43872, ROOT-OS-UBUNTU-2404-CVE-2024-43872, UBUNTU-CVE-2024-43872

## What is CVE-2024-43872?

CVE-2024-43872 is a high-severity denial of service vulnerability in Linux kernel, published on 21 Aug 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

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.

Weakness: CWE-667 (Improper Locking)

## Which versions are affected by CVE-2024-43872?

It affects 1 product.


Products: Linux kernel.

## How do I fix CVE-2024-43872?

Apply the vendor's patch.

## Is CVE-2024-43872 being exploited?

There is no known exploitation of CVE-2024-43872 in the wild and no public exploit code.

## Other vulnerabilities in Linux kernel

- [CVE-2026-53266](https://insights.sbomify.com/CVE-2026-53266/): Linux Kernel Out-of-Bounds Write (high 8.8, exploited in the wild)
- [CVE-2013-6282](https://insights.sbomify.com/CVE-2013-6282/): Linux Kernel Improper Input Validation (high 8.8, exploited in the wild)
- [CVE-2022-0185](https://insights.sbomify.com/CVE-2022-0185/): Linux Kernel Heap-Based Buffer Overflow (high 8.4, exploited in the wild)
- [CVE-2013-2094](https://insights.sbomify.com/CVE-2013-2094/): Linux Kernel Privilege Escalation (high 8.4, exploited in the wild)
- [CVE-2026-53362](https://insights.sbomify.com/CVE-2026-53362/): Linux Kernel Unspecified (high 7.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-43872 and fix it if it is affected.

What it is: CVE-2024-43872 is a high-severity denial of service vulnerability in Linux kernel, published on 21 Aug 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2024-43872 in the wild and no public exploit code.

Affected product: Linux kernel. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2024-43872/ (Markdown: https://insights.sbomify.com/CVE-2024-43872/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-43872
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-43872
- OSV: https://osv.dev/vulnerability/CVE-2024-43872

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-43872/
Summaries are generated and may contain mistakes; the official description above is the record.