{"id":"UBUNTU-CVE-2025-52497","details":"Mbed TLS before 3.6.4 has a PEM parsing one-byte heap-based buffer underflow, in mbedtls_pem_read_buffer and two mbedtls_pk_parse functions, via untrusted PEM input.","modified":"2026-03-27T17:10:10.782263Z","published":"2025-07-04T15:15:00Z","related":["USN-8123-1"],"upstream":["CVE-2025-52497"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2025-52497"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2025-52497"},{"type":"REPORT","url":"https://github.com/Mbed-TLS/mbedtls-docs/blob/main/security-advisories/mbedtls-security-advisory-2025-06-2.md"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8123-1"}],"affected":[{"package":{"name":"mbedtls","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/mbedtls@2.2.1-2ubuntu0.3?arch=source&distro=xenial"},"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"],"ecosystem_specific":{"binaries":[{"binary_version":"2.2.1-2ubuntu0.3","binary_name":"libmbedcrypto0"},{"binary_version":"2.2.1-2ubuntu0.3","binary_name":"libmbedtls-dev"},{"binary_version":"2.2.1-2ubuntu0.3","binary_name":"libmbedtls10"},{"binary_version":"2.2.1-2ubuntu0.3","binary_name":"libmbedx509-0"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-52497.json"}},{"package":{"name":"mbedtls","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/mbedtls@2.8.0-1ubuntu0.1~esm1?arch=source&distro=esm-apps/bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.8.0-1ubuntu0.1~esm1"}]}],"versions":["2.5.1-1ubuntu1","2.6.0-1","2.7.0-2","2.8.0-1"],"ecosystem_specific":{"availability":"Available 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https://ubuntu.com/pro","binaries":[{"binary_version":"2.28.0-1ubuntu0.1~esm1","binary_name":"libmbedcrypto7"},{"binary_version":"2.28.0-1ubuntu0.1~esm1","binary_name":"libmbedtls-dev"},{"binary_version":"2.28.0-1ubuntu0.1~esm1","binary_name":"libmbedtls14"},{"binary_version":"2.28.0-1ubuntu0.1~esm1","binary_name":"libmbedx509-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-52497.json"}},{"package":{"name":"mbedtls","ecosystem":"Ubuntu:Pro:24.04:LTS","purl":"pkg:deb/ubuntu/mbedtls@2.28.8-1ubuntu0.1~esm1?arch=source&distro=esm-apps/noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.28.8-1ubuntu0.1~esm1"}]}],"versions":["2.28.3-1","2.28.6-1ubuntu1","2.28.7-1ubuntu1","2.28.7-1.1ubuntu1","2.28.8-1"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro: 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