Race condition in mbed TLS - CVE-2025-52496
Published: July 7, 2025
Vulnerability identifier: #VU112445
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:L/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2025-52496
CWE-ID: CWE-362
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: ARM
Affected software:
mbed TLS
mbed TLS
Detailed vulnerability description
The vulnerability allows a remote attacker to perform MitM attack.
The vulnerability exists due to a race condition on x86 and amd64 systems that have the AESNI instruction, as it can be used for AES encryption and decryption. A remote attacker can extract AES keys from multithreaded programs and use them to decrypt traffic.
How to mitigate CVE-2025-52496
Install updates from vendor's website.