Double Free The advisory has been revoked - it doesn't affect any version of package mbedtls (opens in a new tab)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk IDSNYK-UBUNTU2204-MBEDTLS-2775841
- published11 Oct 2025
- disclosed20 Dec 2021
Introduced: 20 Dec 2021
CVE-2021-44732 (opens in a new tab)Amendment
The Ubuntu security team deemed this advisory irrelevant for Ubuntu:22.04.
NVD Description
Note: Versions mentioned in the description apply only to the upstream mbedtls package and not the mbedtls package as distributed by Ubuntu.
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.
References
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2021-44732
- https://bugs.gentoo.org/829660
- 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://tls.mbed.org/tech-updates/security-advisories/mbedtls-security-advisory-2021-12
- https://github.com/ARMmbed/mbedtls/releases
- https://lists.debian.org/debian-lts-announce/2025/06/msg00034.html
- https://lists.debian.org/debian-lts-announce/2022/12/msg00036.html