{"id":"CVE-2021-44732","details":"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.","modified":"2026-04-16T04:41:03.029633172Z","published":"2021-12-20T08:15:06.620Z","references":[{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/06/msg00034.html"},{"type":"ADVISORY","url":"https://github.com/ARMmbed/mbedtls/releases"},{"type":"ADVISORY","url":"https://github.com/ARMmbed/mbedtls/releases/tag/v2.16.12"},{"type":"ADVISORY","url":"https://github.com/ARMmbed/mbedtls/releases/tag/v2.28.0"},{"type":"ADVISORY","url":"https://github.com/ARMmbed/mbedtls/releases/tag/v3.1.0"},{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2022/12/msg00036.html"},{"type":"REPORT","url":"https://bugs.gentoo.org/829660"},{"type":"EVIDENCE","url":"https://tls.mbed.org/tech-updates/security-advisories/mbedtls-security-advisory-2021-12"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/armmbed/mbedtls","events":[{"introduced":"0"},{"fixed":"cf4667126010c665341f9e50ef691b7ef8294188"},{"introduced":"3f8d78411a26e833db18d9fbde0e2f0baeda87f0"},{"fixed":"8b3f26a5ac38d4fdccbc5c5366229f3e01dafcc0"},{"introduced":"0"},{"last_affected":"8df2f8e7b9c7bb9390ac74bb7bace27edca81a2b"}],"database_specific":{"versions":[{"introduced":"0"},{"fixed":"2.16.12"},{"introduced":"2.17.0"},{"fixed":"2.28.0"},{"introduced":"0"},{"last_affected":"3.0.0-NA"}]}},{"type":"GIT","repo":"https://github.com/mbed-tls/mbedtls","events":[{"introduced":"0"},{"fixed":"cf4667126010c665341f9e50ef691b7ef8294188"},{"fixed":"8b3f26a5ac38d4fdccbc5c5366229f3e01dafcc0"},{"fixed":"d65aeb37349ad1a50e0f6c9b694d4b5290d60e49"}]}],"versions":["beta-oob-2","mbedos-release-15-11","mbedos-techcon-oob2","mbedtls-2.0.0","mbedtls-2.1.0","mbedtls-2.1.1","mbedtls-2.1.2","mbedtls-2.10.0","mbedtls-2.11.0","mbedtls-2.12.0","mbedtls-2.13.0","mbedtls-2.13.1","mbedtls-2.14.0","mbedtls-2.16.0","mbedtls-2.16.10","mbedtls-2.16.2","mbedtls-2.16.3","mbedtls-2.16.4","mbedtls-2.16.5","mbedtls-2.16.6","mbedtls-2.16.8","mbedtls-2.16.9","mbedtls-2.19.0","mbedtls-2.19.0d1","mbedtls-2.19.0d2","mbedtls-2.19.1","mbedtls-2.2.0","mbedtls-2.2.1","mbedtls-2.20.0","mbedtls-2.20.0d0","mbedtls-2.21.0","mbedtls-2.22.0d0","mbedtls-2.24.0","mbedtls-2.26.0","mbedtls-2.3.0","mbedtls-2.4.0","mbedtls-2.5.0","mbedtls-2.5.1","mbedtls-2.6.0","mbedtls-2.6.0-rc1","mbedtls-2.7.0","mbedtls-2.7.0-rc1","mbedtls-2.8.0","mbedtls-2.8.0-rc1","mbedtls-2.9.0","mbedtls-3.0.0","polarssl-1.2.0","polarssl-1.2.1","polarssl-1.2.2","polarssl-1.2.4","polarssl-1.2.5","polarssl-1.2.6","polarssl-1.3.0","polarssl-1.3.0-rc0","polarssl-1.3.1","polarssl-1.3.2","polarssl-1.3.3","polarssl-1.3.4","polarssl-1.3.5","polarssl-1.3.6","polarssl-1.3.7","polarssl-1.3.8","polarssl-1.3.9","v2.16.10","v2.16.8","v2.16.9","v2.24.0","v2.26.0","v3.0.0","yotta-2.3.1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-44732.json","unresolved_ranges":[{"events":[{"introduced":"0"},{"last_affected":"3.0.0-preview1"}]},{"events":[{"introduced":"0"},{"last_affected":"10.0"}]}]}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}