How severe is CVE-2025-63384?

CVE-2025-63384 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2025-63384 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-63384?

CVE-2025-63384 affects Chipsalliance Rocketchip. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-63384?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-63384 have an EU (EUVD) identifier?

Yes. CVE-2025-63384 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-50785.

When was CVE-2025-63384 published?

CVE-2025-63384 was published on 2025-11-10 and last updated on 2026-06-17.

CVE-2025-63384

CVE-2025-63384 is a medium-severity vulnerability in Chipsalliance Rocketchip with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-266.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 0% (22nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-50785
Weakness: CWE-266
Affected product: Chipsalliance Rocketchip
Published: 2025-11-10
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2025-63384?: 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.
How severe is CVE-2025-63384?: CVE-2025-63384 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2025-63384 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-63384?: CVE-2025-63384 affects Chipsalliance Rocketchip. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-63384?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-63384 have an EU (EUVD) identifier?: Yes. CVE-2025-63384 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-50785.
When was CVE-2025-63384 published?: CVE-2025-63384 was published on 2025-11-10 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:chipsalliance:rocketchip:*:*:*:*:*:*:*:*

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