# CVE-2022-46393: Memory corruption in n/a

> Heap buffer overflow in Mbed TLS DTLS allows code execution or DoS when specific connection ID configurations are enabled.

- **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:** Yes
- **Published:** 15 Dec 2022
- **Updated:** 21 Apr 2025
- **Also known as:** DEBIAN-CVE-2022-46393, GHSA-pjwj-r3p9-jjrq, JLSEC-2025-220, UBUNTU-CVE-2022-46393, openSUSE-SU-2022:10257-1, openSUSE-SU-2024:12581-1

## What is CVE-2022-46393?

CVE-2022-46393 is a critical memory corruption vulnerability in Arm Mbed Tls, published on 15 Dec 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

An issue was discovered in Mbed TLS before 2.28.2 and 3.x before 3.3.0. There is a potential heap-based buffer overflow and heap-based buffer over-read in DTLS if MBEDTLS_SSL_DTLS_CONNECTION_ID is enabled and MBEDTLS_SSL_CID_IN_LEN_MAX > 2 * MBEDTLS_SSL_CID_OUT_LEN_MAX.

Weakness: CWE-787 (Out-of-bounds Write), CWE-125 (Out-of-bounds Read)

## Which versions are affected by CVE-2022-46393?

It affects 3 products.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `mbedtls` | SUSE:Package Hub 15 SP4 | All versions | 2.28.0-bp154.2.3.1 |
| `mbedtls` | openSUSE:Leap 15.4 | All versions | 2.28.0-bp154.2.3.1 |
| `mbedtls-2` | openSUSE:Tumbleweed | All versions | 2.28.2-1.1 |

Products: Arm Mbed Tls, Fedoraproject Fedora, Trustedfirmware Mbed Tls.

## How do I fix CVE-2022-46393?

Upgrade to a fixed version.

## Is CVE-2022-46393 being exploited?

There is no known exploitation of CVE-2022-46393 in the wild and no public exploit code.

## Other vulnerabilities in Arm Mbed Tls

- [CVE-2026-34877](https://insights.sbomify.com/CVE-2026-34877/): Deserialization in n/a (critical 9.8)
- [CVE-2021-44732](https://insights.sbomify.com/CVE-2021-44732/): Use after free in n/a (critical 9.8)
- [CVE-2017-18187](https://insights.sbomify.com/CVE-2017-18187/): Integer overflow in n/a (critical 9.8)
- [CVE-2018-0487](https://insights.sbomify.com/CVE-2018-0487/): Memory corruption in ARM mbed TLS before 1.3.22, before 2.1.10, and before 2.7.0 (critical 9.8)
- [CVE-2018-0488](https://insights.sbomify.com/CVE-2018-0488/): Memory corruption in ARM mbed TLS before 1.3.22, before 2.1.10, and before 2.7.0 (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-46393 and fix it if it is affected.

What it is: CVE-2022-46393 is a critical memory corruption vulnerability in Arm Mbed Tls, published on 15 Dec 2022. 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-2022-46393 in the wild and no public exploit code.

Affected product: Arm Mbed Tls. 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-2022-46393/ (Markdown: https://insights.sbomify.com/CVE-2022-46393/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-46393
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-46393
- OSV: https://osv.dev/vulnerability/CVE-2022-46393

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-46393/
Summaries are generated and may contain mistakes; the official description above is the record.