{"id":"CVE-2025-49601","details":"In MbedTLS 3.3.0 before 3.6.4, mbedtls_lms_import_public_key does not check that the input buffer is at least 4 bytes before reading a 32-bit field, allowing a possible out-of-bounds read on truncated input. Specifically, an out-of-bounds read in mbedtls_lms_import_public_key allows context-dependent attackers to trigger a crash or limited adjacent-memory disclosure by supplying a truncated LMS (Leighton-Micali Signature) public-key buffer under four bytes. An LMS public key starts with a 4-byte type indicator. The function mbedtls_lms_import_public_key reads this type indicator before validating the size of its input.","modified":"2026-08-12T03:51:35.444872402Z","published":"2025-07-04T00:00:00Z","related":["openSUSE-SU-2026:21144-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/49xxx/CVE-2025-49601.json","unresolved_ranges":[{"extracted_events":[{"introduced":"3.3.0"},{"fixed":"3.6.4"}],"source":"AFFECTED_FIELD"},{"extracted_events":[{"introduced":"3.3.0"},{"fixed":"3.6.4"}],"source":"CPE_FIELD"},{"extracted_events":[{"introduced":"3.3.0"},{"fixed":"3.6.4"}],"source":"DESCRIPTION"}],"cna_assigner":"mitre","cwe_ids":["CWE-125"]},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/49xxx/CVE-2025-49601.json"},{"type":"ADVISORY","url":"https://github.com/Mbed-TLS/mbedtls-docs/blob/main/security-advisories/mbedtls-security-advisory-2025-06-4.md"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-49601"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/mbed-tls/mbedtls","events":[{"introduced":"8c89224991adff88d53cd380f42a2baa36f91454"},{"fixed":"c765c831e5c2a0971410692f92f7a81d6ec65ec2"}],"database_specific":{"source":"CPE_RANGE","cpe":"cpe:2.3:a:trustedfirmware:mbed_tls:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"3.3.0"},{"fixed":"3.6.4"}]}}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-49601.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L"}]}