# CVE-2021-24028: Use after free in Facebook Thrift

> An invalid free in Thrift's table-based serialization allows attackers to cause crashes or potentially execute arbitrary code.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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:** 13 Apr 2021
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-qrr3-c36x-2pcc

## What is CVE-2021-24028?

CVE-2021-24028 is a critical use after free vulnerability in Facebook Thrift, published on 13 Apr 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

An invalid free in Thrift's table-based serialization can cause the application to crash or potentially result in code execution or other undesirable effects. This issue affects Facebook Thrift prior to v2021.02.22.00.

Weakness: CWE-763 (Release of Invalid Pointer or Reference)

## Which versions are affected by CVE-2021-24028?

It affects 1 product.


Products: Facebook Thrift.

## How do I fix CVE-2021-24028?

No fix has been published for CVE-2021-24028 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-24028 being exploited?

There is no known exploitation of CVE-2021-24028 in the wild and no public exploit code.

## Other vulnerabilities in Facebook Thrift

- [CVE-2019-11939](https://insights.sbomify.com/CVE-2019-11939/): Golang Facebook Thrift servers vulnerable to denial of service (high 7.5)
- [CVE-2019-11938](https://insights.sbomify.com/CVE-2019-11938/): Denial of service in Facebook Thrift (high 7.5)
- [CVE-2019-3553](https://insights.sbomify.com/CVE-2019-3553/): Denial of service in Facebook Thrift (high 7.5)
- [CVE-2019-3552](https://insights.sbomify.com/CVE-2019-3552/): Denial of service in Facebook Thrift (high 7.5)
- [CVE-2019-3558](https://insights.sbomify.com/CVE-2019-3558/): Denial of service in Facebook Thrift (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-24028 and fix it if it is affected.

What it is: CVE-2021-24028 is a critical use after free vulnerability in Facebook Thrift, published on 13 Apr 2021. 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-2021-24028 in the wild and no public exploit code.

Affected product: Facebook Thrift. 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-2021-24028/ (Markdown: https://insights.sbomify.com/CVE-2021-24028/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-24028
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-24028
- OSV: https://osv.dev/vulnerability/CVE-2021-24028

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-24028/
Summaries are generated and may contain mistakes; the official description above is the record.