# CVE-2015-8949: Use after free in n/a

> A use-after-free flaw in the DBD::mysql Perl module allows attackers to potentially execute arbitrary code or cause a denial of service.

- **Severity:** Critical 9.8 (`CVSS:3.0/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:** 19 Aug 2016
- **Updated:** 6 Aug 2024
- **Also known as:** DEBIAN-CVE-2015-8949, GHSA-48mj-69cx-pcqg, UBUNTU-CVE-2015-8949

## What is CVE-2015-8949?

CVE-2015-8949 is a critical use after free vulnerability in Debian Debian Linux, published on 19 Aug 2016. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Use-after-free vulnerability in the my_login function in DBD::mysql before 4.033_01 allows attackers to have unspecified impact by leveraging a call to mysql_errno after a failure of my_login.

Weakness: CWE-416 (Use After Free)

## Which versions are affected by CVE-2015-8949?

It affects 2 products.


Products: Dbd-Mysql Project Dbd-Mysql, Debian Debian Linux.

## How do I fix CVE-2015-8949?

Upgrade to a fixed version.

## Is CVE-2015-8949 being exploited?

There is no known exploitation of CVE-2015-8949 in the wild and no public exploit code.

## Other vulnerabilities in Debian Debian Linux

- [CVE-2017-10788](https://insights.sbomify.com/CVE-2017-10788/): Use after free in n/a (critical 9.8)
- [CVE-2014-9906](https://insights.sbomify.com/CVE-2014-9906/): Use after free in n/a (critical 9.8)
- [CVE-2016-1251](https://insights.sbomify.com/CVE-2016-1251/): Use after free in DBD::mysql before 4.041 (high 8.1)
- [CVE-2016-1246](https://insights.sbomify.com/CVE-2016-1246/): Memory corruption in n/a (high 7.5)
- [CVE-2017-10789](https://insights.sbomify.com/CVE-2017-10789/): Security feature bypass in n/a (medium 5.9)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2015-8949 and fix it if it is affected.

What it is: CVE-2015-8949 is a critical use after free vulnerability in Debian Debian Linux, published on 19 Aug 2016. 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-2015-8949 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-2015-8949/ (Markdown: https://insights.sbomify.com/CVE-2015-8949/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2015-8949
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2015-8949
- OSV: https://osv.dev/vulnerability/CVE-2015-8949

---
From sbomify Insights: https://insights.sbomify.com/CVE-2015-8949/
Summaries are generated and may contain mistakes; the official description above is the record.