# CVE-2025-8774: riscv-boom SonicBOOM L1 Data Cache timing discrepancy

> Local attackers can exploit timing discrepancies in the L1 Data Cache to potentially leak sensitive information from the SonicBOOM RISC-V processor.

- **Severity:** Low 2.0 (`CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 9 Aug 2025
- **Updated:** 12 Aug 2025
- **Also known as:** GHSA-9j52-q8c5-8mpr

## What is CVE-2025-8774?

CVE-2025-8774 is a low-severity vulnerability in riscv-boom SonicBOOM, published on 9 Aug 2025. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

A vulnerability has been found in riscv-boom SonicBOOM up to 2.2.3 and classified as problematic. Affected by this vulnerability is an unknown functionality of the component L1 Data Cache Handler. The manipulation leads to observable timing discrepancy. Local access is required to approach this attack. The complexity of an attack is rather high. The exploitation appears to be difficult. The vendor was contacted early about this disclosure but did not respond in any way.

Weakness: CWE-208 (Observable Timing Discrepancy), CWE-203 (Observable Discrepancy)

## Which versions are affected by CVE-2025-8774?

It affects 1 product.


Products: Boom-Core Risvc-Boom.

## How do I fix CVE-2025-8774?

No fix has been published for CVE-2025-8774 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-8774 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-8774 exists.

## Other vulnerabilities in riscv-boom SonicBOOM

- [CVE-2022-26296](https://insights.sbomify.com/CVE-2022-26296/): Information disclosure in n/a (medium 5.5)
- [CVE-2020-29561](https://insights.sbomify.com/CVE-2020-29561/): Other in n/a (medium 5.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-8774 and fix it if it is affected.

What it is: CVE-2025-8774 is a low-severity vulnerability in riscv-boom SonicBOOM, published on 9 Aug 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-8774 exists.

Affected product: riscv-boom SonicBOOM. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2025-8774/ (Markdown: https://insights.sbomify.com/CVE-2025-8774/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-8774
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-8774
- OSV: https://osv.dev/vulnerability/CVE-2025-8774

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-8774/
Summaries are generated and may contain mistakes; the official description above is the record.