# CVE-2020-13649: Null dereference in n/a

> Attackers can cause a denial of service in JerryScript via a null pointer dereference during out-of-memory conditions.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 28 May 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-47mc-x3rj-x64v, UBUNTU-CVE-2020-13649

## What is CVE-2020-13649?

CVE-2020-13649 is a high-severity vulnerability in Jerryscript Jerryscript, published on 28 May 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

parser/js/js-scanner.c in JerryScript 2.2.0 mishandles errors during certain out-of-memory conditions, as demonstrated by a scanner_reverse_info_list NULL pointer dereference and a scanner_scan_all assertion failure.

Weakness: CWE-754 (Improper Check for Unusual or Exceptional Conditions), CWE-617 (Reachable Assertion), CWE-476 (NULL Pointer Dereference)

## Which versions are affected by CVE-2020-13649?

It affects 1 product.


Products: Jerryscript Jerryscript.

## How do I fix CVE-2020-13649?

No fix has been published for CVE-2020-13649 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-13649 being exploited?

There is no known exploitation of CVE-2020-13649 in the wild and no public exploit code.

## Other vulnerabilities in Jerryscript Jerryscript

- [CVE-2023-36109](https://insights.sbomify.com/CVE-2023-36109/): Memory corruption in n/a (critical 9.8)
- [CVE-2023-38961](https://insights.sbomify.com/CVE-2023-38961/): Memory corruption in n/a (critical 9.8)
- [CVE-2020-22597](https://insights.sbomify.com/CVE-2020-22597/): Memory corruption in n/a (critical 9.8)
- [CVE-2021-42863](https://insights.sbomify.com/CVE-2021-42863/): Memory corruption in n/a (critical 9.8)
- [CVE-2021-43453](https://insights.sbomify.com/CVE-2021-43453/): Memory corruption in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-13649 and fix it if it is affected.

What it is: CVE-2020-13649 is a high-severity vulnerability in Jerryscript Jerryscript, published on 28 May 2020. 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-2020-13649 in the wild and no public exploit code.

Affected product: Jerryscript Jerryscript. 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-2020-13649/ (Markdown: https://insights.sbomify.com/CVE-2020-13649/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-13649
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-13649
- OSV: https://osv.dev/vulnerability/CVE-2020-13649

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-13649/
Summaries are generated and may contain mistakes; the official description above is the record.