{"id":"UBUNTU-CVE-2025-49087","details":"In Mbed TLS 3.6.1 through 3.6.3 before 3.6.4, a timing discrepancy in block cipher padding removal allows an attacker to recover the plaintext when PKCS#7 padding mode is used.","modified":"2026-05-20T16:11:23.319901094Z","published":"2025-07-20T19:15:00Z","upstream":["CVE-2025-49087"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2025-49087"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2025-49087"},{"type":"REPORT","url":"https://github.com/Mbed-TLS/mbedtls-docs/blob/main/security-advisories/mbedtls-security-advisory-2025-06-5.md"}],"affected":[{"package":{"name":"mbedtls","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/mbedtls?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.6.2-3ubuntu1"],"ecosystem_specific":{"binaries":[{"binary_version":"3.6.2-3ubuntu1","binary_name":"libmbedcrypto16"},{"binary_name":"libmbedtls21","binary_version":"3.6.2-3ubuntu1"},{"binary_name":"libmbedx509-7","binary_version":"3.6.2-3ubuntu1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-49087.json"}},{"package":{"name":"mbedtls","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/mbedtls?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.6.2-3ubuntu1","3.6.5-0.1ubuntu1","3.6.5-0.1ubuntu2"],"ecosystem_specific":{"binaries":[{"binary_name":"libmbedcrypto16","binary_version":"3.6.5-0.1ubuntu2"},{"binary_version":"3.6.5-0.1ubuntu2","binary_name":"libmbedtls21"},{"binary_version":"3.6.5-0.1ubuntu2","binary_name":"libmbedx509-7"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-49087.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:N"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N"},{"type":"Ubuntu","score":"medium"}]}