Is CVE-2025-63384 actively exploited?

No active exploitation of CVE-2025-63384 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2025-63384 be exploited remotely?

Yes. CVE-2025-63384 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2025-63384?

CVE-2025-63384 has a CVSS score of 6.5 (MEDIUM).

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MEDIUM

CVE-2025-63384

CWE-266Published: November 10, 2025· Updated: Jun 17, 2026

6.5

CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2025-63384 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 6.5.