CVE-2025-56301: An issue was discovered in Chipsalliance Rocket-Chip commit f517abbf41abb65cea37421d3559f9739efd00a9 (2025-01-

This week

HIGH 7.5REMOTEDOWNGRADE

CVE-2025-56301 is a high-severity flaw (CVSS 7.5) affecting rocket-chip. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered in Chipsalliance Rocket-Chip commit f517abbf41abb65cea37421d3559f9739efd00a9 (2025-01-29) allowing attackers to corrupt exception handling and privilege state transitions via a flawed interaction between exception handling and MRET return mechanisms in the CSR logic when an exception is triggered during MRET execution. The Control and Status Register (CSR) logic has a flawed interaction between exception handling and excep

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.6% (top 49%)
CISA exploited list	No
Weakness	CWE-1281
Published	2025-09-30
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: chipsalliance

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-09-30 15:15 UTCPublished CVE record published
2026-06-17 09:42 UTCUpdated Record last modified

chipsalliance rocket-chip DOWNGRADE

Affected: 2025-01-29

Fixed in: no fixed release known

Safe to downgrade to: a release before 2025-01-29

1. Check installed version

apt-cache policy rocket-chip || rpm -q rocket-chip || rocket-chip --version

2. No fixed release: DOWNGRADE to a release before 2025-01-29 (Debian / Ubuntu)

apt-cache madison rocket-chip sudo apt install rocket-chip=<VERSION_BEFORE_2025-01-29> sudo apt-mark hold rocket-chip

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list rocket-chip sudo dnf downgrade rocket-chip-<VERSION_BEFORE_2025-01-29> sudo dnf versionlock add rocket-chip

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-56301?

rocket-chip: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2025-56301 being exploited?

CVE-2025-56301 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-56301 affect?

CVE-2025-56301 affects rocket-chip. Severity is high (CVSS 7.5). An issue was discovered in Chipsalliance Rocket-Chip commit f517abbf41abb65cea37421d3559f9739efd00a9 (2025-01-29) allowing attackers to corrupt exception handling and privilege state transitions via a flawed interaction between exception ha

How urgent is CVE-2025-56301?

Priority 49/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

References

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