# CVE-2021-46322: Null dereference in n/a

> A null pointer dereference in the Duktape JavaScript engine allows attackers to cause a denial of service via crafted input.

- **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:** 20 Jan 2022
- **Updated:** 4 Aug 2024
- **Also known as:** DEBIAN-CVE-2021-46322, DLA-3378-1, GHSA-hmgv-4jwm-xc9x, UBUNTU-CVE-2021-46322

## What is CVE-2021-46322?

CVE-2021-46322 is a medium-severity vulnerability in n/a, published on 20 Jan 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

Duktape v2.99.99 was discovered to contain a SEGV vulnerability via the component duk_push_tval in duktape/duk_api_stack.c.

Weakness: CWE-404 (Improper Resource Shutdown or Release)

## Which versions are affected by CVE-2021-46322?

It affects 1 product.


Products: Duktape Project Duktape.

## How do I fix CVE-2021-46322?

Apply the vendor's patch.

## Is CVE-2021-46322 being exploited?

There is no known exploitation of CVE-2021-46322 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-46322 and fix it if it is affected.

What it is: CVE-2021-46322 is a medium-severity vulnerability in n/a, published on 20 Jan 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-2021-46322 in the wild and no public exploit code.

Affected product: n/a. 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-2021-46322/ (Markdown: https://insights.sbomify.com/CVE-2021-46322/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-46322
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-46322
- OSV: https://osv.dev/vulnerability/CVE-2021-46322

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-46322/
Summaries are generated and may contain mistakes; the official description above is the record.