# CVE-2019-19769: Use after free in n/a

> A use-after-free vulnerability in the Linux kernel's perf_trace_lock_acquire function allows attackers to potentially execute code or escalate privileges.

- **Severity:** Medium 6.7 (`CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/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:** 12 Dec 2019
- **Updated:** 5 Aug 2024
- **Also known as:** A-150693748, ASB-A-150693748, DEBIAN-CVE-2019-19769, GHSA-c798-7c9v-6jgh, UBUNTU-CVE-2019-19769

## What is CVE-2019-19769?

CVE-2019-19769 is a medium-severity use after free vulnerability in Fedoraproject Fedora, published on 12 Dec 2019. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

In the Linux kernel 5.3.10, there is a use-after-free (read) in the perf_trace_lock_acquire function (related to include/trace/events/lock.h).

Weakness: CWE-416 (Use After Free)

## Which versions are affected by CVE-2019-19769?

It affects 2 products.


Products: Fedoraproject Fedora, Linux kernel.

## How do I fix CVE-2019-19769?

Apply the vendor's patch.

## Is CVE-2019-19769 being exploited?

There is no known exploitation of CVE-2019-19769 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-2019-19769 and fix it if it is affected.

What it is: CVE-2019-19769 is a medium-severity use after free vulnerability in Fedoraproject Fedora, published on 12 Dec 2019. 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-2019-19769 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-2019-19769/ (Markdown: https://insights.sbomify.com/CVE-2019-19769/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-19769
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-19769
- OSV: https://osv.dev/vulnerability/CVE-2019-19769

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-19769/
Summaries are generated and may contain mistakes; the official description above is the record.