VULNERABILITY INTELLIGENCE

CVE-2025-63384

CVSS score6.5 MEDIUM
EPSS probability0.33%
CISA KEVNot currently listed
Published2025-11-10
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Description

A vulnerability was discovered in RISC-V Rocket-Chip v1.6 and before implementation where the SRET (Supervisor-mode Exception Return) instruction fails to correctly transition the processor's privilege level. Instead of downgrading from Machine-mode (M-mode) to Supervisor-mode (S-mode) as specified by the sstatus.SPP bit, the processor incorrectly remains in M-mode, leading to a critical privilege retention vulnerability.

Weakness classification

  • CWE-266: Incorrect Privilege Assignment

Primary references