# CVE-2014-6272: Integer overflow in n/a

> Integer overflows in Libevent allow attackers to cause denial of service or potential code execution via large inputs.

- **Severity:** High 7.5 (`AV:N/AC:L/Au:N/C:P/I:P/A:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 24 Aug 2015
- **Updated:** 6 Aug 2024
- **Also known as:** DEBIAN-CVE-2014-6272, DLA-137-1, GHSA-246p-m32j-f38r, MGASA-2015-0009, UBUNTU-CVE-2014-6272, USN-2477-1, openSUSE-SU-2024:10236-1, openSUSE-SU-2024:10720-1

## What is CVE-2014-6272?

CVE-2014-6272 is a high-severity vulnerability in Debian Debian Linux, published on 24 Aug 2015. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Multiple integer overflows in the evbuffer API in Libevent 1.4.x before 1.4.15, 2.0.x before 2.0.22, and 2.1.x before 2.1.5-beta allow context-dependent attackers to cause a denial of service or possibly have other unspecified impact via "insanely large inputs" to the (1) evbuffer_add, (2) evbuffer_expand, or (3) bufferevent_write function, which triggers a heap-based buffer overflow or an infinite loop.  NOTE: this identifier has been SPLIT per ADT3 due to different affected versions. See CVE-2015-6525 for the functions that are only affected in 2.0 and later.

Weakness: CWE-189

## Which versions are affected by CVE-2014-6272?

It affects 2 products.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `dnscrypt-proxy` | openSUSE:Tumbleweed | All versions | 2.1.0-1.2 |

Products: Debian Debian Linux, Libevent Project Libevent.

## How do I fix CVE-2014-6272?

Upgrade to a fixed version.

## Is CVE-2014-6272 being exploited?

There is no known exploitation of CVE-2014-6272 in the wild and no public exploit code.

## Other vulnerabilities in Debian Debian Linux

- [CVE-2015-3306](https://insights.sbomify.com/CVE-2015-3306/): ProFTPD Improper Access Control (critical 10.0, exploited in the wild)
- [CVE-2025-49113](https://insights.sbomify.com/CVE-2025-49113/): RoundCube Webmail Deserialization of Untrusted Data (critical 9.9, exploited in the wild)
- [CVE-2026-24061](https://insights.sbomify.com/CVE-2026-24061/): GNU InetUtils Argument Injection (critical 9.8, exploited in the wild)
- [CVE-2025-39682](https://insights.sbomify.com/CVE-2025-39682/): Linux Kernel Improper Check for Unusual or Exceptional Conditions (critical 9.8, exploited in the wild)
- [CVE-2024-9680](https://insights.sbomify.com/CVE-2024-9680/): Mozilla Firefox Use-After-Free (critical 9.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2014-6272 and fix it if it is affected.

What it is: CVE-2014-6272 is a high-severity vulnerability in Debian Debian Linux, published on 24 Aug 2015. 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-2014-6272 in the wild and no public exploit code.

Affected product: Debian Debian 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-2014-6272/ (Markdown: https://insights.sbomify.com/CVE-2014-6272/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2014-6272
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2014-6272
- OSV: https://osv.dev/vulnerability/CVE-2014-6272

---
From sbomify Insights: https://insights.sbomify.com/CVE-2014-6272/
Summaries are generated and may contain mistakes; the official description above is the record.