# CVE-2023-1032: Use after free in linux

> A double free vulnerability in the Linux kernel's io_uring subsystem allows local attackers to potentially execute arbitrary code or escalate privileges.

- **Severity:** Medium 4.7 (`CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 8 Jan 2024
- **Updated:** 27 Aug 2024
- **Also known as:** DEBIAN-CVE-2023-1032, GHSA-5f35-x73c-jq69, UBUNTU-CVE-2023-1032

## What is CVE-2023-1032?

CVE-2023-1032 is a medium-severity use after free vulnerability in Canonical Ubuntu Linux, published on 8 Jan 2024. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

The Linux kernel io_uring IORING_OP_SOCKET operation contained a double free in function __sys_socket_file() in file net/socket.c. This issue was introduced in da214a475f8bd1d3e9e7a19ddfeb4d1617551bab and fixed in 649c15c7691e9b13cbe9bf6c65c365350e056067.

Weakness: CWE-415 (Double Free)

## Which versions are affected by CVE-2023-1032?

It affects 2 products.


Products: Canonical Ubuntu Linux, Linux kernel.

## How do I fix CVE-2023-1032?

Apply the vendor's patch.

## Is CVE-2023-1032 being exploited?

There is no known exploitation of CVE-2023-1032 in the wild and no public exploit code.

## Other vulnerabilities in Canonical Ubuntu Linux

- [CVE-2020-11651](https://insights.sbomify.com/CVE-2020-11651/): SaltStack Salt Authentication Bypass (critical 9.8, exploited in the wild)
- [CVE-2020-7247](https://insights.sbomify.com/CVE-2020-7247/): OpenSMTPD Remote Code Execution (critical 9.8, exploited in the wild)
- [CVE-2019-16928](https://insights.sbomify.com/CVE-2019-16928/): Exim Out-of-bounds Write (critical 9.8, exploited in the wild)
- [CVE-2018-6789](https://insights.sbomify.com/CVE-2018-6789/): Exim Buffer Overflow (critical 9.8, exploited in the wild)
- [CVE-2015-2590](https://insights.sbomify.com/CVE-2015-2590/): Oracle Java SE and Java SE Embedded Remote Code Execution (critical 9.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-1032 and fix it if it is affected.

What it is: CVE-2023-1032 is a medium-severity use after free vulnerability in Canonical Ubuntu Linux, published on 8 Jan 2024. 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-2023-1032 in the wild and no public exploit code.

Affected product: Canonical Ubuntu 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-2023-1032/ (Markdown: https://insights.sbomify.com/CVE-2023-1032/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-1032
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-1032
- OSV: https://osv.dev/vulnerability/CVE-2023-1032

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-1032/
Summaries are generated and may contain mistakes; the official description above is the record.