CVE-2025-7396

Name	CVE-2025-7396
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.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
wolfssl (PTS)	bullseye	4.6.0+p1-0+deb11u2	fixed
	bookworm	5.5.4-2+deb12u1	fixed
	sid, trixie	5.7.2-0.1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
wolfssl	source	(unstable)	(not affected)

Notes

- wolfssl <not-affected> (Vulnerable code introduced in 5.8.0)
https://github.com/wolfSSL/wolfssl/pull/8736
https://github.com/wolfSSL/wolfssl/blob/master/ChangeLog.md#wolfssl-release-582-july-17-2025