# CVE-2023-2430: Race condition in kernel

> A local attacker can cause a denial of service in the Linux kernel due to a missing lock in the io_uring subsystem.

- **Severity:** Medium 5.5 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 23 Jul 2023
- **Updated:** 6 Mar 2025
- **Also known as:** AZL-27759, DEBIAN-CVE-2023-2430, GHSA-3xvm-4g57-gvj6, UBUNTU-CVE-2023-2430

## What is CVE-2023-2430?

CVE-2023-2430 is a medium-severity vulnerability in Linux kernel, published on 23 Jul 2023. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

A vulnerability was found due to missing lock for IOPOLL flaw in io_cqring_event_overflow() in io_uring.c in Linux Kernel. This flaw allows a local attacker with user privilege to trigger a Denial of Service threat.

Weakness: CWE-667 (Improper Locking), CWE-413 (Improper Resource Locking)

## Which versions are affected by CVE-2023-2430?

It affects 1 product.


Products: Linux kernel.

## How do I fix CVE-2023-2430?

Apply the vendor's patch.

## Is CVE-2023-2430 being exploited?

There is no known exploitation of CVE-2023-2430 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-2023-2430 and fix it if it is affected.

What it is: CVE-2023-2430 is a medium-severity vulnerability in Linux kernel, published on 23 Jul 2023. 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-2023-2430 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-2023-2430/ (Markdown: https://insights.sbomify.com/CVE-2023-2430/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-2430
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-2430
- OSV: https://osv.dev/vulnerability/CVE-2023-2430

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-2430/
Summaries are generated and may contain mistakes; the official description above is the record.