# CVE-2019-7317: Use after free in n/a

> A use-after-free vulnerability in libpng allows attackers to execute arbitrary code or cause a denial of service via crafted PNG images.

- **Severity:** Medium 5.3 (`CVSS:3.1/AV:N/AC:H/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:** 4 Feb 2019
- **Updated:** 28 May 2026
- **Also known as:** ALPINE-CVE-2019-7317, AZL-45210, AZL-45288, CLEANSTART-2026-CP81765, CLEANSTART-2026-HQ42098, DEBIAN-CVE-2019-7317, DSA-4435-1, GHSA-m96g-x499-p5f9, MGASA-2019-0126, MINI-hh48-wwr3-ph92, MINI-vqgv-pw8x-cpjf, MINI-wqw4-chj5-46fg, UBUNTU-CVE-2019-7317, USN-3962-1

## What is CVE-2019-7317?

CVE-2019-7317 is a medium-severity use after free vulnerability in Canonical Ubuntu Linux, published on 4 Feb 2019. 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

png_image_free in png.c in libpng 1.6.x before 1.6.37 has a use-after-free because png_image_free_function is called under png_safe_execute.

Weakness: CWE-416 (Use After Free)

## Which versions are affected by CVE-2019-7317?

It affects 32 products.


Products: Canonical Ubuntu Linux, Debian Debian Linux, Hp Xp7 Command View, Hpe Xp7 Command View Advanced Edition Suite, Libpng Libpng, Mozilla Firefox, Mozilla Thunderbird, Netapp Active Iq Unified Manager, Netapp Cloud Backup, Netapp E-Series Santricity Management, Netapp E-Series Santricity Storage Manager, Netapp E-Series Santricity Unified Manager, Netapp E-Series Santricity Web Services, Netapp Oncommand Insight, Netapp Oncommand Workflow Automation, Netapp Plug-in for Symantec Netbackup, Netapp Snapmanager, Netapp Steelstore, Opensuse Leap, Opensuse Package Hub and 12 more.

## How do I fix CVE-2019-7317?

Upgrade to a fixed version.

## Is CVE-2019-7317 being exploited?

There is no known exploitation of CVE-2019-7317 in the wild and no public exploit code.

## Other vulnerabilities in Canonical Ubuntu Linux

- [CVE-2020-11651](https://insights.sbomify.com/CVE-2020-11651/): SaltStack Salt Authentication Bypass (critical 9.8, exploited in the wild)
- [CVE-2020-7247](https://insights.sbomify.com/CVE-2020-7247/): OpenSMTPD Remote Code Execution (critical 9.8, exploited in the wild)
- [CVE-2019-16928](https://insights.sbomify.com/CVE-2019-16928/): Exim Out-of-bounds Write (critical 9.8, exploited in the wild)
- [CVE-2018-6789](https://insights.sbomify.com/CVE-2018-6789/): Exim Buffer Overflow (critical 9.8, exploited in the wild)
- [CVE-2015-2590](https://insights.sbomify.com/CVE-2015-2590/): Oracle Java SE and Java SE Embedded Remote Code Execution (critical 9.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-7317 and fix it if it is affected.

What it is: CVE-2019-7317 is a medium-severity use after free vulnerability in Canonical Ubuntu Linux, published on 4 Feb 2019. 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-2019-7317 in the wild and no public exploit code.

Affected product: Canonical Ubuntu 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-2019-7317/ (Markdown: https://insights.sbomify.com/CVE-2019-7317/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-7317
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-7317
- OSV: https://osv.dev/vulnerability/CVE-2019-7317

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-7317/
Summaries are generated and may contain mistakes; the official description above is the record.