# CVE-2009-2416: Use after free in n/a

> Attackers can cause application crashes via crafted XML files exploiting use-after-free flaws in libxml2 and libxml libraries.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/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:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 11 Aug 2009
- **Updated:** 21 Jan 2025
- **Also known as:** DEBIAN-CVE-2009-2416, GHSA-2vw2-h5mp-gfhw

## What is CVE-2009-2416?

CVE-2009-2416 is a medium-severity use after free vulnerability in Apple Iphone Os, published on 11 Aug 2009. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

Multiple use-after-free vulnerabilities in libxml2 2.5.10, 2.6.16, 2.6.26, 2.6.27, and 2.6.32, and libxml 1.8.17, allow context-dependent attackers to cause a denial of service (application crash) via crafted (1) Notation or (2) Enumeration attribute types in an XML file, as demonstrated by the Codenomicon XML fuzzing framework.

Weakness: CWE-416 (Use After Free)

## Which versions are affected by CVE-2009-2416?

It affects 19 products.


Products: Apple Iphone Os, Apple Mac Os X, Apple Mac Os X Server, Apple Safari, Canonical Ubuntu Linux, Debian Debian Linux, Fedoraproject Fedora, Google Chrome, Opensuse Opensuse, Redhat Enterprise Linux, Sun Openoffice.org, Suse Linux Enterprise, Suse Linux Enterprise Server, Vmware Esx, Vmware Esxi, Vmware Vcenter Server, Vmware Vma, Xmlsoft Libxml, Xmlsoft Libxml2.

## How do I fix CVE-2009-2416?

Upgrade to a fixed version.

## Is CVE-2009-2416 being exploited?

There is no known exploitation of CVE-2009-2416 in the wild and no public exploit code.

## Other vulnerabilities in Apple Iphone Os

- [CVE-2021-30666](https://insights.sbomify.com/CVE-2021-30666/): Apple iOS WebKit Buffer Overflow (high 8.8, exploited in the wild)
- [CVE-2021-30761](https://insights.sbomify.com/CVE-2021-30761/): Apple iOS WebKit Memory Corruption (high 8.8, exploited in the wild)
- [CVE-2021-30762](https://insights.sbomify.com/CVE-2021-30762/): Apple iOS WebKit Use-After-Free (high 8.8, exploited in the wild)
- [CVE-2016-4657](https://insights.sbomify.com/CVE-2016-4657/): Apple iOS Webkit Memory Corruption (high 8.8, exploited in the wild)
- [CVE-2019-7286](https://insights.sbomify.com/CVE-2019-7286/): Apple Multiple Products Memory Corruption (high 7.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2009-2416 and fix it if it is affected.

What it is: CVE-2009-2416 is a medium-severity use after free vulnerability in Apple Iphone Os, published on 11 Aug 2009. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2009-2416 in the wild and no public exploit code.

Affected product: Apple Iphone Os. 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-2009-2416/ (Markdown: https://insights.sbomify.com/CVE-2009-2416/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2009-2416
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2009-2416
- OSV: https://osv.dev/vulnerability/CVE-2009-2416

---
From sbomify Insights: https://insights.sbomify.com/CVE-2009-2416/
Summaries are generated and may contain mistakes; the official description above is the record.