# CVE-2024-23313: Integer overflow in libbiosig

> An integer underflow in libbiosig allows arbitrary code execution via a malicious .famos file, affecting applications using this library.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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:** 20 Feb 2024
- **Updated:** 4 Nov 2025
- **Also known as:** DEBIAN-CVE-2024-23313, GHSA-q3rr-xqpw-vv2x, UBUNTU-CVE-2024-23313

## What is CVE-2024-23313?

CVE-2024-23313 is a critical vulnerability in Fedoraproject Fedora, published on 20 Feb 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

An integer underflow vulnerability exists in the sopen_FAMOS_read functionality of The Biosig Project libbiosig 2.5.0 and Master Branch (ab0ee111). A specially crafted .famos file can lead to an out-of-bounds write which in turn can lead to arbitrary code execution. An attacker can provide a malicious file to trigger this vulnerability.

Weakness: CWE-191 (Integer Underflow (Wrap or Wraparound))

## Which versions are affected by CVE-2024-23313?

It affects 2 products.


Products: Fedoraproject Fedora, Libbiosig Project Libbiosig.

## How do I fix CVE-2024-23313?

Apply the vendor's patch.

## Is CVE-2024-23313 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-23313 exists.

## 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-2024-23313 and fix it if it is affected.

What it is: CVE-2024-23313 is a critical vulnerability in Fedoraproject Fedora, published on 20 Feb 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-23313 exists.

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-2024-23313/ (Markdown: https://insights.sbomify.com/CVE-2024-23313/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-23313
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-23313
- OSV: https://osv.dev/vulnerability/CVE-2024-23313

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-23313/
Summaries are generated and may contain mistakes; the official description above is the record.