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CVE-2021-44732

CRITICAL

9.8

CVSS Severity Score

EPSS Score0.0740%

EPSS Percentile26.09th

PublishedDec 20, 2021

Last ModifiedJun 5, 2026

Vulnerability Description

Mbed TLS before 3.0.1 has a double free in certain out-of-memory conditions, as demonstrated by an mbedtls_ssl_set_session() failure.

Affected Platforms (CPE)

📦

Arm

Mbed Tls

< 2.16.12

📦

Arm

Mbed Tls

>= 2.17.0 and < 2.28.0

📦

Trustedfirmware

Mbed Tls

= 3.0.0

📦

Trustedfirmware

Mbed Tls

= 3.0.0

💻

Debian

Debian Linux

= 10.0

References & Advisories

🔗 https://bugs.gentoo.org/829660

🔗 https://github.com/ARMmbed/mbedtls/releases

🔗 https://github.com/ARMmbed/mbedtls/releases/tag/v2.16.12

🔗 https://github.com/ARMmbed/mbedtls/releases/tag/v2.28.0

🔗 https://github.com/ARMmbed/mbedtls/releases/tag/v3.1.0

🔗 https://lists.debian.org/debian-lts-announce/2022/12/msg00036.html

🔗 https://tls.mbed.org/tech-updates/security-advisories/mbedtls-security-advisory-2021-12

🔗 https://bugs.gentoo.org/829660

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