CVE-2025-52497

State: Published
Severity: 4.8 Medium
Published: Jul 4, 2025
Updated: Nov 3, 2025
Reserved: Jun 17, 2025

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	4.8 Medium	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L	mitre

Weaknesses

CWE-193 Off-by-one Error

Affected Products

Product	Versions
mbedtlsMbed	before 3.6.4Affected

References

https://github.com/Mbed-TLS/mbedtls-docs/blob/main/security-advisories/mbedtls-security-advisory-2025-06-2.md
https://lists.debian.org/debian-lts-announce/2025/08/msg00013.html

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