# OSV-2022-949: Heap-use-after-free in s_file_write_flush

> A heap-use-after-free vulnerability in file writing functions allows attackers to potentially execute code or cause denial of service.

- **Severity:** Not scored
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Not stated
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 24 Sep 2022

## What is OSV-2022-949?

OSV-2022-949 is an use after free vulnerability in ghostscript, published on 24 Sep 2022. 

### Official description

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=51745

```
Crash type: Heap-use-after-free READ 8
Crash state:
s_file_write_flush
sclose
stream_finalize
```

## Which versions are affected by OSV-2022-949?

1 open source package ship an affected version, including ghostscript.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `ghostscript` | OSS-Fuzz | All versions | None |

## How do I fix OSV-2022-949?

No fix has been published for OSV-2022-949 yet. Limit exposure of the affected software until one is available.

## Is OSV-2022-949 being exploited?

There is no known exploitation of OSV-2022-949 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for OSV-2022-949 and fix it if it is affected.

What it is: OSV-2022-949 is an use after free vulnerability in ghostscript, published on 24 Sep 2022. 
Exploitation: There is no known exploitation of OSV-2022-949 in the wild and no public exploit code.

Affected packages and fixed versions:
- ghostscript (OSS-Fuzz): affected all versions; no fix listed

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/OSV-2022-949/ (Markdown: https://insights.sbomify.com/OSV-2022-949/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/OSV-2022-949

---
From sbomify Insights: https://insights.sbomify.com/OSV-2022-949/
Summaries are generated and may contain mistakes; the official description above is the record.