Mbed TLS before 3.6.4 has a PEM parsing one-byte heap-based buffer underflow, in mbedtlspemreadbuffer and two mbedtlspk_parse functions, via untrusted PEM input.
{
"sources": [
{
"url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2025-52497",
"id": "CVE-2025-52497",
"imported": "2025-11-20T23:04:02.877Z",
"modified": "2025-11-03T20:19:13.123Z",
"html_url": "https://nvd.nist.gov/vuln/detail/CVE-2025-52497",
"published": "2025-07-04T15:15:22.787Z"
}
],
"license": "CC-BY-4.0"
}