# CVE-2024-25389: Weak cryptography in n/a

> RT-Thread uses a weak random number generator, potentially allowing attackers to predict values and bypass security mechanisms.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 27 Mar 2024
- **Updated:** 4 Nov 2025
- **Also known as:** GHSA-6c2g-6j82-6fjx

## What is CVE-2024-25389?

CVE-2024-25389 is a high-severity vulnerability in n/a, published on 27 Mar 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

RT-Thread through 5.0.2 generates random numbers with a weak algorithm of "seed = 214013L * seed + 2531011L; return (seed >> 16) & 0x7FFF;" in calc_random in drivers/misc/rt_random.c.

Weakness: CWE-338 (Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG))

## Which versions are affected by CVE-2024-25389?

It affects 1 product.


Products: Rt-Thread Rt-Thread.

## How do I fix CVE-2024-25389?

No fix has been published for CVE-2024-25389 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-25389 being exploited?

There is no known exploitation of CVE-2024-25389 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2024-25393](https://insights.sbomify.com/CVE-2024-25393/): Memory corruption in n/a (critical 9.8)
- [CVE-2024-25395](https://insights.sbomify.com/CVE-2024-25395/): Memory corruption in n/a (high 8.8)
- [CVE-2025-5865](https://insights.sbomify.com/CVE-2025-5865/): RT-Thread Parameter lwp_syscall.c sys_select memory corruption (high 8.6)
- [CVE-2025-5866](https://insights.sbomify.com/CVE-2025-5866/): RT-Thread lwp_syscall.c sys_sigprocmask array index (high 8.6)
- [CVE-2025-5867](https://insights.sbomify.com/CVE-2025-5867/): RT-Thread lwp_syscall.c csys_sendto null pointer dereference (high 8.6)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-25389 and fix it if it is affected.

What it is: CVE-2024-25389 is a high-severity vulnerability in n/a, published on 27 Mar 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2024-25389 in the wild and no public exploit code.

Affected product: n/a. 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-2024-25389/ (Markdown: https://insights.sbomify.com/CVE-2024-25389/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-25389
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-25389
- OSV: https://osv.dev/vulnerability/CVE-2024-25389

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-25389/
Summaries are generated and may contain mistakes; the official description above is the record.