# CVE-2026-98429: RDMA/efa: Keep EQ resources alive while IRQ is registered

> A use-after-free in the Linux kernel EFA driver allows local attackers to cause denial of service or potentially execute code via race conditions during IRQ handling.

- **Severity:** Not scored
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 14 Oct 2026
- **Updated:** 19 Oct 2026
- **Also known as:** AZL-108149, BELL-CVE-2026-98429, DEBIAN-CVE-2026-98429, GHSA-8cmm-3crh-f6m2, UBUNTU-CVE-2026-98429

## What is CVE-2026-98429?

CVE-2026-98429 is an use after free vulnerability in Linux, published on 14 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

In the Linux kernel, the following vulnerability has been resolved:

RDMA/efa: Keep EQ resources alive while IRQ is registered

The completion IRQ handler accesses the EQ state and DMA buffer. Its IRQ was
registered before that state was initialized, while teardown released the
buffer before free_irq() synchronized the handler.

Initialize the EQ without arming it, register the IRQ, and then arm it.
Reverse the resource order during teardown by freeing the IRQ before
destroying the EQ.

## Which versions are affected by CVE-2026-98429?


## How do I fix CVE-2026-98429?

Apply the vendor's patch.

## Is CVE-2026-98429 being exploited?

There is no known exploitation of CVE-2026-98429 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-98429 and fix it if it is affected.

What it is: CVE-2026-98429 is an use after free vulnerability in Linux, published on 14 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-98429 in the wild and no public exploit code.

Affected product: Linux. 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-2026-98429/ (Markdown: https://insights.sbomify.com/CVE-2026-98429/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-98429
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-98429
- OSV: https://osv.dev/vulnerability/CVE-2026-98429

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-98429/
Summaries are generated and may contain mistakes; the official description above is the record.