Unchecked Return Value in mbed TLS - CVE-2025-49600
Published: July 7, 2025
Vulnerability identifier: #VU112447
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2025-49600
CWE-ID: CWE-252
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to bypass signature verification.
The vulnerability exists due to unchecked return value in mbedtls_lms_verify(). A remote attacker can bypass LMS signature verification process.
Affected software
mbed TLS
Fedora
mbedtls
Fedora
mbedtls
How to mitigate CVE-2025-49600
Install updates from vendor's website.
mbed TLS - update to 3.6.4
mbedtls - addressed in versions 3.6.4-1.fc42, 3.6.4-2.el10_0, 3.6.4-2.el10_1
mbedtls - addressed in versions 3.6.4-1.fc42, 3.6.4-2.el10_0, 3.6.4-2.el10_1