CVE-2020-16150 Information disclosure in n/a

What is CVE-2020-16150?

CVE-2020-16150 is a medium-severity vulnerability in Arm Mbed Tls, published on 2 Sep 2020. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A Lucky 13 timing side channel in mbedtls_ssl_decrypt_buf in library/ssl_msg.c in Trusted Firmware Mbed TLS through 2.23.0 allows an attacker to recover secret key information. This affects CBC mode because of a computed time difference based on a padding length.

Weakness: CWE-203

Which versions are affected by CVE-2020-16150?

It affects 3 products.

Products include Arm Mbed Tls, Debian Debian Linux, Fedoraproject Fedora.

How do I fix CVE-2020-16150?

Upgrade to a fixed version.

Is CVE-2020-16150 being exploited?

There is no known exploitation of CVE-2020-16150 in the wild and no public exploit code.

Other vulnerabilities in Arm Mbed Tls

• CVE-2026-34877 Deserialization in n/a Critical 9.8
• CVE-2022-46393 Memory corruption in n/a Critical 9.8
• CVE-2021-44732 Use after free in n/a Critical 9.8
• CVE-2017-18187 Integer overflow in n/a Critical 9.8
• 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

All Arm Mbed Tls vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as ALPINE-CVE-2020-16150, DEBIAN-CVE-2020-16150, GHSA-fgr3-j7rx-4hfv, JLSEC-2025-202, MGASA-2020-0370, UBUNTU-CVE-2020-16150.