# CVE-2024-1312: Kernel: race condition leads to use after free during vma lock in lock_vma_under_rcu

> A local attacker can trigger a use-after-free in the Linux kernel memory management subsystem, causing a system crash.

- **Severity:** Medium 5.1 (`CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H`)
- **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:** 8 Feb 2024
- **Updated:** 1 Aug 2024
- **Also known as:** AZL-34305, DEBIAN-CVE-2024-1312, GHSA-798f-8qgx-h85f, UBUNTU-CVE-2024-1312

## What is CVE-2024-1312?

CVE-2024-1312 is a medium-severity use after free vulnerability in Fedoraproject Fedora, published on 8 Feb 2024. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

A use-after-free flaw was found in the Linux kernel's Memory Management subsystem when a user wins two races at the same time with a fail in the mas_prev_slot function. This issue could allow a local user to crash the system.

Weakness: CWE-416 (Use After Free)

## Which versions are affected by CVE-2024-1312?

It affects 2 products.


Products: Fedoraproject Fedora, Linux kernel.

## How do I fix CVE-2024-1312?

Apply the vendor's patch.

## Is CVE-2024-1312 being exploited?

There is no known exploitation of CVE-2024-1312 in the wild and no public exploit code.

## Other vulnerabilities in Fedoraproject Fedora

- [CVE-2024-4577](https://insights.sbomify.com/CVE-2024-4577/): PHP-CGI OS Command Injection (critical 9.8, exploited in the wild)
- [CVE-2021-39226](https://insights.sbomify.com/CVE-2021-39226/): Grafana Authentication Bypass (critical 9.8, exploited in the wild)
- [CVE-2019-5544](https://insights.sbomify.com/CVE-2019-5544/): VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow (critical 9.8, exploited in the wild)
- [CVE-2024-4947](https://insights.sbomify.com/CVE-2024-4947/): Google Chromium V8 Type Confusion (critical 9.6, exploited in the wild)
- [CVE-2024-4671](https://insights.sbomify.com/CVE-2024-4671/): Google Chromium Visuals Use-After-Free (critical 9.6, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-1312 and fix it if it is affected.

What it is: CVE-2024-1312 is a medium-severity use after free vulnerability in Fedoraproject Fedora, published on 8 Feb 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-2024-1312 in the wild and no public exploit code.

Affected product: Fedoraproject Fedora. 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-2024-1312/ (Markdown: https://insights.sbomify.com/CVE-2024-1312/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-1312
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-1312
- OSV: https://osv.dev/vulnerability/CVE-2024-1312

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-1312/
Summaries are generated and may contain mistakes; the official description above is the record.