# CVE-2022-46392: Information disclosure in n/a

> An attacker with precise memory access can recover RSA private keys from Mbed TLS if the window size is small, requiring an upgrade to secure versions.

- **Severity:** Medium 5.3 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 15 Dec 2022
- **Updated:** 3 Nov 2025
- **Also known as:** AZL-12968, DEBIAN-CVE-2022-46392, GHSA-2cww-m3rc-2vgr, JLSEC-2025-219, UBUNTU-CVE-2022-46392

## What is CVE-2022-46392?

CVE-2022-46392 is a medium-severity vulnerability in Arm Mbed Tls, published on 15 Dec 2022. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

An issue was discovered in Mbed TLS before 2.28.2 and 3.x before 3.3.0. An adversary with access to precise enough information about memory accesses (typically, an untrusted operating system attacking a secure enclave) can recover an RSA private key after observing the victim performing a single private-key operation, if the window size (MBEDTLS_MPI_WINDOW_SIZE) used for the exponentiation is 3 or smaller.

Weakness: CWE-203 (Observable Discrepancy)

## Which versions are affected by CVE-2022-46392?

It affects 3 products.


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

## How do I fix CVE-2022-46392?

Upgrade to a fixed version.

## Is CVE-2022-46392 being exploited?

There is no known exploitation of CVE-2022-46392 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-2022-46393](https://insights.sbomify.com/CVE-2022-46393/): Memory corruption 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)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-46392 and fix it if it is affected.

What it is: CVE-2022-46392 is a medium-severity vulnerability in Arm Mbed Tls, published on 15 Dec 2022. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2022-46392 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-2022-46392/ (Markdown: https://insights.sbomify.com/CVE-2022-46392/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-46392
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-46392
- OSV: https://osv.dev/vulnerability/CVE-2022-46392

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-46392/
Summaries are generated and may contain mistakes; the official description above is the record.