# CVE-2025-62626: Weak cryptography in AMD EPYC™ 9005 Series Processors

> A local attacker can influence RDSEED instruction output on AMD CPUs, leading to weak random number generation and potential security bypasses.

- **Severity:** High 7.2 (`CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N`)
- **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:** Yes
- **Published:** 21 Nov 2025
- **Updated:** 26 Feb 2026
- **Also known as:** BELL-CVE-2025-62626, DEBIAN-CVE-2025-62626, GHSA-gcfh-89mc-2426, ROOT-OS-UBUNTU-2204-CVE-2025-62626, ROOT-OS-UBUNTU-2404-CVE-2025-62626, UBUNTU-CVE-2025-62626

## What is CVE-2025-62626?

CVE-2025-62626 is a high-severity vulnerability in AMD EPYC™ 9005 Series Processors, published on 21 Nov 2025. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Improper handling of insufficient entropy in the AMD CPUs could allow a local attacker to influence the values returned by the RDSEED instruction, potentially resulting in the consumption of insufficiently random values.

Weakness: CWE-333 (Improper Handling of Insufficient Entropy in TRNG)

## Which versions are affected by CVE-2025-62626?


## How do I fix CVE-2025-62626?

Apply the vendor's patch.

## Is CVE-2025-62626 being exploited?

There is no known exploitation of CVE-2025-62626 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-62626 and fix it if it is affected.

What it is: CVE-2025-62626 is a high-severity vulnerability in AMD EPYC™ 9005 Series Processors, published on 21 Nov 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2025-62626 in the wild and no public exploit code.

Affected product: AMD EPYC™ 9005 Series Processors. 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-2025-62626/ (Markdown: https://insights.sbomify.com/CVE-2025-62626/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-62626
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-62626
- OSV: https://osv.dev/vulnerability/CVE-2025-62626

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-62626/
Summaries are generated and may contain mistakes; the official description above is the record.