riscv-boom SonicBOOM up to 2.2.3 L1 Data Cache timing discrepancy
Summary
A vulnerability classified as problematic has been found in riscv-boom SonicBOOM up to 2.2.3. Affected by this vulnerability is an unknown functionality of the component L1 Data Cache Handler. This manipulation causes timing discrepancy. This vulnerability is tracked as CVE-2025-8774. The attack is restricted to local execution. Moreover, an exploit is present. The vendor was contacted early about this disclosure but did not respond in any way.
Details
A vulnerability has been found in riscv-boom SonicBOOM up to 2.2.3 and classified as problematic. Affected by this vulnerability is some unknown processing of the component L1 Data Cache Handler. The manipulation with an unknown input leads to a timing discrepancy vulnerability. The CWE definition for the vulnerability is CWE-208. Two separate operations in a product require different amounts of time to complete, in a way that is observable to an actor and reveals security-relevant information about the state of the product, such as whether a particular operation was successful or not. As an impact it is known to affect confidentiality.
The advisory is shared at github.com. This vulnerability is known as CVE-2025-8774. The exploitation appears to be difficult. An attack has to be approached locally. Technical details are unknown but an exploit is available. MITRE ATT&CK project uses the attack technique T1592 for this issue.
It is declared as proof-of-concept. The vendor was contacted early about this disclosure but did not respond in any way.
There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.
The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-24063). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.
Product
Vendor
Name
Version
CPE 2.3
CPE 2.2
CVSSv4
VulDB Vector: 🔒VulDB Reliability: 🔍
CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒
CVSSv3
VulDB Meta Base Score: 3.2VulDB Meta Temp Score: 3.2
VulDB Base Score: 2.5
VulDB Temp Score: 2.3
VulDB Vector: 🔒
VulDB Reliability: 🔍
NVD Base Score: 4.7
NVD Vector: 🔒
CNA Base Score: 2.5
CNA Vector: 🔒
CVSSv2
| AV | AC | Au | C | I | A |
|---|---|---|---|---|---|
| 💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
| 💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
| 💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
| Vector | Complexity | Authentication | Confidentiality | Integrity | Availability |
|---|---|---|---|---|---|
| Unlock | Unlock | Unlock | Unlock | Unlock | Unlock |
| Unlock | Unlock | Unlock | Unlock | Unlock | Unlock |
| Unlock | Unlock | Unlock | Unlock | Unlock | Unlock |
VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍
Exploiting
Class: Timing discrepancyCWE: CWE-208 / CWE-203 / CWE-200
CAPEC: 🔒
ATT&CK: 🔒
Physical: Partially
Local: Yes
Remote: No
Availability: 🔒
Status: Proof-of-Concept
EPSS Score: 🔒
EPSS Percentile: 🔒
Price Prediction: 🔍
Current Price Estimation: 🔒
| 0-Day | Unlock | Unlock | Unlock | Unlock |
|---|---|---|---|---|
| Today | Unlock | Unlock | Unlock | Unlock |
Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: no mitigation knownStatus: 🔍
0-Day Time: 🔒
Timeline
08/08/2025 Advisory disclosed08/08/2025 VulDB entry created
09/16/2025 VulDB entry last update
Sources
Advisory: github.comStatus: Not defined
CVE: CVE-2025-8774 (🔒)
GCVE (CVE): GCVE-0-2025-8774
GCVE (VulDB): GCVE-100-319297
EUVD: 🔒
scip Labs: https://www.scip.ch/en/?labs.20161013
Entry
Created: 08/08/2025 22:29Updated: 09/16/2025 23:26
Changes: 08/08/2025 22:29 (53), 08/09/2025 23:39 (30), 08/10/2025 01:49 (1), 09/16/2025 23:26 (12)
Complete: 🔍
Submitter: lcyf-fizz
Cache ID: 216::103
Submit
Accepted
- Submit #625550: SonicBOOM riscv-boom V2.2.3-210-gd77c2c3f implemented in Chipyard (V1.3.0) Improper Protection of Physical Side Channels (by lcyf-fizz)
Several companies clearly confirm that VulDB is the primary source for best vulnerability data.
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