# CVE-2018-4877: Use after free in Adobe Flash Player before 28.0.0.161

> A use-after-free vulnerability in Adobe Flash Player allows attackers to execute arbitrary code via a dangling pointer in the Primetime SDK.

- **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:** 6 Feb 2018
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-hcf8-mxwr-h337, UBUNTU-CVE-2018-4877

## What is CVE-2018-4877?

CVE-2018-4877 is a critical use after free vulnerability in Adobe Flash Player, published on 6 Feb 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A use-after-free vulnerability was discovered in Adobe Flash Player before 28.0.0.161. This vulnerability occurs due to a dangling pointer in the Primetime SDK related to media player's quality of service functionality. A successful attack can lead to arbitrary code execution.

Weakness: CWE-416 (Use After Free)

## Which versions are affected by CVE-2018-4877?

It affects 4 products.


Products: Adobe Flash Player, Redhat Enterprise Linux Desktop, Redhat Enterprise Linux Server, Redhat Enterprise Linux Workstation.

## How do I fix CVE-2018-4877?

Upgrade to a fixed version.

## Is CVE-2018-4877 being exploited?

There is no known exploitation of CVE-2018-4877 in the wild and no public exploit code.

## Other vulnerabilities in Adobe Flash Player

- [CVE-2017-11292](https://insights.sbomify.com/CVE-2017-11292/): Adobe Flash Player Type Confusion (high 8.8, exploited in the wild)
- [CVE-2016-7892](https://insights.sbomify.com/CVE-2016-7892/): Adobe Flash Player Use-After-Free (high 8.8, exploited in the wild)
- [CVE-2016-7855](https://insights.sbomify.com/CVE-2016-7855/): Adobe Flash Player Use-After-Free (high 8.8, exploited in the wild)
- [CVE-2014-0497](https://insights.sbomify.com/CVE-2014-0497/): Adobe Flash Player Integer Underflow Vulnerablity (high 8.8, exploited in the wild)
- [CVE-2013-0643](https://insights.sbomify.com/CVE-2013-0643/): Adobe Flash Player Incorrect Default Permissions (high 8.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-4877 and fix it if it is affected.

What it is: CVE-2018-4877 is a critical use after free vulnerability in Adobe Flash Player, published on 6 Feb 2018. 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-2018-4877 in the wild and no public exploit code.

Affected product: Adobe Flash Player. 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-2018-4877/ (Markdown: https://insights.sbomify.com/CVE-2018-4877/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-4877
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-4877
- OSV: https://osv.dev/vulnerability/CVE-2018-4877

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-4877/
Summaries are generated and may contain mistakes; the official description above is the record.