# CVE-2022-26291: Use after free in n/a

> Attackers can cause a Denial of Service in lrzip by providing a crafted Irz file that triggers a use-after-free condition.

- **Severity:** Medium 5.5 (`CVSS:3.1/AV:L/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:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 28 Mar 2022
- **Updated:** 3 Aug 2024
- **Also known as:** DEBIAN-CVE-2022-26291, GHSA-65qg-fhgm-59fj, UBUNTU-CVE-2022-26291

## What is CVE-2022-26291?

CVE-2022-26291 is a medium-severity use after free vulnerability in Debian Debian Linux, published on 28 Mar 2022. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official description

lrzip v0.641 was discovered to contain a multiple concurrency use-after-free between the functions zpaq_decompress_buf() and clear_rulist(). This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted Irz file.

Weakness: CWE-416 (Use After Free)

## Which versions are affected by CVE-2022-26291?

It affects 2 products.


Products: Debian Debian Linux, Long Range Zip Project Long Range Zip.

## How do I fix CVE-2022-26291?

Apply the vendor's patch.

## Is CVE-2022-26291 being exploited?

There is no known exploitation of CVE-2022-26291 in the wild and no public exploit code.

## Other vulnerabilities in Debian Debian Linux

- [CVE-2015-3306](https://insights.sbomify.com/CVE-2015-3306/): ProFTPD Improper Access Control (critical 10.0, exploited in the wild)
- [CVE-2025-49113](https://insights.sbomify.com/CVE-2025-49113/): RoundCube Webmail Deserialization of Untrusted Data (critical 9.9, exploited in the wild)
- [CVE-2026-24061](https://insights.sbomify.com/CVE-2026-24061/): GNU InetUtils Argument Injection (critical 9.8, exploited in the wild)
- [CVE-2025-39682](https://insights.sbomify.com/CVE-2025-39682/): Linux Kernel Improper Check for Unusual or Exceptional Conditions (critical 9.8, exploited in the wild)
- [CVE-2024-9680](https://insights.sbomify.com/CVE-2024-9680/): Mozilla Firefox Use-After-Free (critical 9.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-26291 and fix it if it is affected.

What it is: CVE-2022-26291 is a medium-severity use after free vulnerability in Debian Debian Linux, published on 28 Mar 2022. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2022-26291 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-2022-26291/ (Markdown: https://insights.sbomify.com/CVE-2022-26291/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-26291
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-26291
- OSV: https://osv.dev/vulnerability/CVE-2022-26291

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-26291/
Summaries are generated and may contain mistakes; the official description above is the record.