Covert Timing Channel in OpenSSL - CVE-2025-9231
Published: October 1, 2025
Vulnerability identifier: #VU116214
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2025-9231
CWE-ID: CWE-385
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: OpenSSL Software Foundation
Affected software:
OpenSSL
OpenSSL
Detailed vulnerability description
The vulnerability allows a remote attacker to gain access to sensitive information.
The vulnerability exists due to timing side-channel in SM2 signature computations on 64 bit ARM platforms. A remote attacker can recover the private key and decrypt data.
How to mitigate CVE-2025-9231
Install updates from vendor's website.