# CVE-2023-1295: Privilege escalation with IO_RING_OP_CLOSE in the Linux Kernel

> A local attacker can exploit a time-of-check to time-of-use race condition in the io_uring subsystem to escalate privileges to root.

- **Severity:** High 7.8 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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:** 28 Jun 2023
- **Updated:** 13 Feb 2025
- **Also known as:** DEBIAN-CVE-2023-1295, GHSA-3gcx-wjr4-jv32, UBUNTU-CVE-2023-1295

## What is CVE-2023-1295?

CVE-2023-1295 is a high-severity vulnerability in Linux kernel, published on 28 Jun 2023. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

A time-of-check to time-of-use issue exists in io_uring subsystem's IORING_OP_CLOSE operation in the Linux kernel's versions 5.6 - 5.11 (inclusive), which allows a local user to elevate their privileges to root. Introduced in b5dba59e0cf7e2cc4d3b3b1ac5fe81ddf21959eb, patched in 9eac1904d3364254d622bf2c771c4f85cd435fc2, backported to stable in 788d0824269bef539fe31a785b1517882eafed93.

Weakness: CWE-367 (Time-of-check Time-of-use (TOCTOU) Race Condition)

## Which versions are affected by CVE-2023-1295?

It affects 6 products.


Products: Linux kernel, Netapp H300s, Netapp H410c, Netapp H410s, Netapp H500s, Netapp H700s.

## How do I fix CVE-2023-1295?

Apply the vendor's patch.

## Is CVE-2023-1295 being exploited?

There is no known exploitation of CVE-2023-1295 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-2023-1295 and fix it if it is affected.

What it is: CVE-2023-1295 is a high-severity vulnerability in Linux kernel, published on 28 Jun 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-2023-1295 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-2023-1295/ (Markdown: https://insights.sbomify.com/CVE-2023-1295/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-1295
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-1295
- OSV: https://osv.dev/vulnerability/CVE-2023-1295

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-1295/
Summaries are generated and may contain mistakes; the official description above is the record.