# CVE-2023-46331: Memory corruption in n/a

> An out-of-bounds memory read in the WebAssembly toolkit can cause a segmentation fault, leading to denial of service.

- **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:** No
- **Published:** 23 Oct 2023
- **Updated:** 17 Sep 2024
- **Also known as:** DEBIAN-CVE-2023-46331, GHSA-p567-4mpc-fq6p, PYSEC-2023-319, UBUNTU-CVE-2023-46331

## What is CVE-2023-46331?

CVE-2023-46331 is a medium-severity memory corruption vulnerability in n/a, published on 23 Oct 2023. 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

WebAssembly wabt 1.0.33 has an Out-of-Bound Memory Read in in DataSegment::IsValidRange(), which lead to segmentation fault.

Weakness: CWE-125 (Out-of-bounds Read)

## Which versions are affected by CVE-2023-46331?

1 open source package ship an affected version, including wabt. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `wabt` | PyPI | All versions to 1.0.33 | None |

Products: Webassembly Webassembly Binary Toolkit.

## How do I fix CVE-2023-46331?

No fix has been published for CVE-2023-46331 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-46331 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-46331 exists.

## Other vulnerabilities in n/a

- [CVE-2023-31670](https://insights.sbomify.com/CVE-2023-31670/): Denial of service in n/a (high 7.5)
- [CVE-2023-46332](https://insights.sbomify.com/CVE-2023-46332/): Memory corruption in n/a (medium 5.5)
- [CVE-2023-31669](https://insights.sbomify.com/CVE-2023-31669/): Denial of service in n/a (medium 5.5)
- [CVE-2025-3122](https://insights.sbomify.com/CVE-2025-3122/): WebAssembly wabt binary-reader-interp.cc BeginFunctionBody null pointer dereference (low 2.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-46331 and fix it if it is affected.

What it is: CVE-2023-46331 is a medium-severity memory corruption vulnerability in n/a, published on 23 Oct 2023. 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: It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-46331 exists.

Affected packages and fixed versions:
- wabt (PyPI): affected all versions up to 1.0.33; 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/CVE-2023-46331/ (Markdown: https://insights.sbomify.com/CVE-2023-46331/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-46331
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-46331
- OSV: https://osv.dev/vulnerability/CVE-2023-46331

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-46331/
Summaries are generated and may contain mistakes; the official description above is the record.