Vulnerability · Published Jul 18, 2025 · Assigned by wolfSSL
CVE-2025-7396Curve25519 Blinding
Medium 5.6
In plain English
A medium-severity security flaw in wolfSSL from wolfSSL. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 12% of all known vulnerabilities).
Official description
In wolfSSL release 5.8.2 blinding support is turned on by default for Curve25519 in applicable builds. The blinding configure option is only for the base C implementation of Curve25519. It is not needed, or available with; ARM assembly builds, Intel assembly builds, and the small Curve25519 feature. While the side-channel attack on extracting a private key would be very difficult to execute in practice, enabling blinding provides an additional layer of protection for devices that may be more susceptible to physical access or side-channel observation.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu:22.04:LTS | wolfssl | no fix listed | UBUNTU-CVE-2025-7396 |
| Ubuntu:24.04:LTS | wolfssl | no fix listed | UBUNTU-CVE-2025-7396 |
| Ubuntu:25.10 | wolfssl | no fix listed | UBUNTU-CVE-2025-7396 |
| Ubuntu:26.04:LTS | wolfssl | no fix listed | UBUNTU-CVE-2025-7396 |
| Ubuntu:26.10 | wolfssl | no fix listed | UBUNTU-CVE-2025-7396 |
Affected products (as reported)
Weakness: CWE-385 · Vector: CVSS:4.0/AV:P/AC:H/AT:P/PR:L/UI:A/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N