CVE-2022-46393

Name: CVE-2022-46393
Creator: NVD / NIST
Published: 2022-12-15T23:15:10.57+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 1.15%

Last modified Jun 17, 2026

CVE-2022-46393 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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.. EPSS estimates a 1.15% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

1.15%

62.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Arm	Mbed Tls	< 2.28.2
Trustedfirmware	Mbed Tls	>= 3.0.0, < 3.3.0
Fedoraproject	Fedora	36
Fedoraproject	Fedora	37

References

https://github.com/Mbed-TLS/mbedtls/releases/tag/v2.28.2Release Notes, Third Party Advisory
https://github.com/Mbed-TLS/mbedtls/releases/tag/v3.3.0Release Notes, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4BR7ZCVKLPGCOEEALUHZMFHXQHR6S4QL/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6XMKJ5IMJEPXYAHHU56Z4P2FSYIEAESB/
https://mbed-tls.readthedocs.io/en/latest/tech-updates/security-advisories/Vendor Advisory
https://github.com/Mbed-TLS/mbedtls/releases/tag/v2.28.2Release Notes, Third Party Advisory
https://github.com/Mbed-TLS/mbedtls/releases/tag/v3.3.0Release Notes, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4BR7ZCVKLPGCOEEALUHZMFHXQHR6S4QL/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6XMKJ5IMJEPXYAHHU56Z4P2FSYIEAESB/
https://mbed-tls.readthedocs.io/en/latest/tech-updates/security-advisories/Vendor Advisory

Timeline

Published: Dec 15, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2022-46393?

How severe is CVE-2022-46393?

CVE-2022-46393 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.15% probability of exploitation in the next 30 days.

How do I fix CVE-2022-46393?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2022-46393?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST