VULNERABILITY INTELLIGENCE

CVE-2026-10512

CVSS score7.5 HIGH
EPSS probability0.45%
CISA KEVNot currently listed
Published2026-06-25
Last modified2026-06-26
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Description

The X25519 x86_64 assembly implementation fails to clear the most significant bit during the final modular reduction, so the computed result may not be fully reduced modulo the field prime 2^255 - 19. This can leave the field element in a non-canonical form, producing an incorrect result from the scalar multiplication and potentially a wrong shared secret. The final carry-propagation chains in the x64 and AVX2 reduction routines could overflow into the top bit, and the high limb was not masked afterward, so the 255-bit field element was left non-canonical.

Weakness classification

  • facts@wolfssl.com: CWE-682

Primary references