{"id":"CVE-2021-45450","aliases":["EUVD-2021-32221","GHSA-97vf-2gx4-2rfm","JLSEC-2025-215","UBUNTU-CVE-2021-45450","openSUSE-SU-2024:11752-1","openSUSE-SU-2026:11119-1"],"status":"published","title":"In Mbed TLS before 2.28.0 and 3.x before 3.1.0, psa_cipher_generate_iv and psa_cipher_encrypt...","description":"In Mbed TLS before 2.28.0 and 3.x before 3.1.0, psa_cipher_generate_iv and psa_cipher_encrypt allow policy bypass or oracle-based decryption when the output buffer is at memory locations accessible to an untrusted application.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-11","score":0.01226,"percentile":0.69213,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-327"],"published":"2021-12-21T00:00:00Z","modified":"2026-10-24T10:51:25Z","fixes":[{"ecosystem":"Julia","package":"MbedTLS_jll","fixed_in":["2.28.0+0"],"sources":["osv"]},{"ecosystem":"openSUSE:Tumbleweed","package":"mbedtls-2","fixed_in":["2.28.0-1.1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Julia","package":"MbedTLS_jll","ranges":[{"type":"SEMVER","events":[{"introduced":"2.24.0+0"},{"fixed":"2.28.0+0"}]}]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"mbedtls","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.1.2-1","2.2.0-1","2.2.1-1","2.2.1-2","2.2.1-2ubuntu0.1","2.2.1-2ubuntu0.2","2.2.1-2ubuntu0.3"]},{"source":"osv","ecosystem":"Ubuntu:Pro:18.04:LTS","package":"mbedtls","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.5.1-1ubuntu1","2.6.0-1","2.7.0-2","2.8.0-1","2.8.0-1ubuntu0.1~esm1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:20.04:LTS","package":"mbedtls","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.16.2-1","2.16.3-1","2.16.4-1ubuntu2","2.16.4-1ubuntu2+esm1"]},{"source":"osv","ecosystem":"openSUSE:Tumbleweed","package":"mbedtls-2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.28.0-1.1"}]}]},{"source":"osv","ecosystem":"openSUSE:Tumbleweed","package":"mbedtls-3","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.6.6-1.1"}]}],"bundled":14}],"products":[{"vendor":"fedoraproject","product":"fedora"},{"vendor":"trustedfirmware","product":"mbed_tls"}],"references":[{"url":"https://github.com/ARMmbed/mbedtls/releases/tag/v2.28.0","tags":["x_transferred","Release Notes","Third Party Advisory","advisory","web","report"]},{"url":"https://github.com/ARMmbed/mbedtls/releases/tag/v3.1.0","tags":["x_transferred","Release Notes","Third Party Advisory","advisory","web","report"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TALJHOYAYSUJTLN6BYGLO4YJGNZUY74W/","tags":["vendor-advisory","x_transferred","Mailing List","article","web"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IL66WKJGXY5AXMTFE7QDMGL3RIBD6PX5/","tags":["vendor-advisory","x_transferred","Mailing List","article","web"]},{"url":"https://security.gentoo.org/glsa/202301-08","tags":["vendor-advisory","x_transferred","Third Party Advisory","advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-45450"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IL66WKJGXY5AXMTFE7QDMGL3RIBD6PX5"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TALJHOYAYSUJTLN6BYGLO4YJGNZUY74W"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/IL66WKJGXY5AXMTFE7QDMGL3RIBD6PX5"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TALJHOYAYSUJTLN6BYGLO4YJGNZUY74W"},{"url":"https://github.com/advisories/GHSA-97vf-2gx4-2rfm"},{"url":"https://ubuntu.com/security/CVE-2021-45450","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-45450","tags":["report"]},{"url":"","tags":["advisory"]},{"url":"https://www.suse.com/security/cve/CVE-2021-45450","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2014-8627","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2014-8628","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2015-1182","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2015-5291","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2015-7575","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2017-14032","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2017-2784","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2018-0487","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2018-0488","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2018-19608","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-24119","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2022-35409","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2022-46393","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2021-45450","description":"In 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psa_cipher_generate_iv and psa_cipher_encrypt allow policy bypass or oracle-based decryption when the output buffer is at memory locations accessible to an untrusted application.","status":"published","published":"2021-12-22T00:00:51Z","modified":"2026-06-05T21:32:55Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"}],"cwes":["CWE-327"],"updated_at":"2026-11-02T15:08:36.196175Z"}],"nvd":[{"id":"CVE-2021-45450","description":"In Mbed TLS before 2.28.0 and 3.x before 3.1.0, psa_cipher_generate_iv and psa_cipher_encrypt allow policy bypass or oracle-based decryption when the output buffer is at memory locations accessible to an untrusted 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