# CVE-2023-3312: Use after free in Kernel

> A double release flaw in the Linux Kernel cpufreq subsystem allows attackers to cause a denial of service during device unbind.

- **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:** 19 Jun 2023
- **Updated:** 23 Apr 2025
- **Also known as:** AZL-27272, GHSA-6mq7-w565-8rf7, UBUNTU-CVE-2023-3312

## What is CVE-2023-3312?

CVE-2023-3312 is a high-severity use after free vulnerability in Linux kernel, published on 19 Jun 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A vulnerability was found in drivers/cpufreq/qcom-cpufreq-hw.c in cpufreq subsystem in the Linux Kernel. This flaw, during device unbind will lead to double release problem leading to denial of service.

Weakness: CWE-415 (Double Free)

## Which versions are affected by CVE-2023-3312?

It affects 1 product.


Products: Linux kernel.

## How do I fix CVE-2023-3312?

Apply the vendor's patch.

## Is CVE-2023-3312 being exploited?

There is no known exploitation of CVE-2023-3312 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-2023-3312 and fix it if it is affected.

What it is: CVE-2023-3312 is a high-severity use after free vulnerability in Linux kernel, published on 19 Jun 2023. 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-2023-3312 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-2023-3312/ (Markdown: https://insights.sbomify.com/CVE-2023-3312/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-3312
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-3312
- OSV: https://osv.dev/vulnerability/CVE-2023-3312

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-3312/
Summaries are generated and may contain mistakes; the official description above is the record.