CVE-2022-46393
CWE-125Published: December 15, 2022· Updated: Jun 17, 2026
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.
Risk Analysis
Mbed TLS is susceptible to heap-based buffer overflows and over-reads in DTLS when specific configurations are enabled. This critical vulnerability is remotely exploitable and carries a 9.8 CVSS score.
No public exploit is known, and it is not in the KEV catalog.
Upgrade Mbed TLS to version 2.28.2 or 3.3.0 or later to remediate the buffer handling issues.
Technical Analysis
CVE-2022-46393 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.
A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.
CVSS v3.1 Vector Breakdown
Affected Vendors & Products
Exploit & PoC Resources
Official Patches & Advisories
All References (10)
Quick Facts
Related CVEs (CWE-125)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2022-46393 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts