# CVE-2026-37232: Denial of service in n/a

> A remote attacker can crash the 5G base station process by triggering a division-by-zero error in PRB utilization metrics, causing service interruption.

- **Severity:** High 8.6 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 1 Jun 2026
- **Updated:** 2 Jun 2026
- **Also known as:** GHSA-vp5m-x22p-8w47

## What is CVE-2026-37232?

CVE-2026-37232 is a high-severity denial of service vulnerability in n/a, published on 1 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

An issue was discovered in OpenAirInterface5G 2.4.0 (nr-softmodem) in the E2SM-KPM RAN Function's PRB utilization metric calculation. The functions fill_RRU_PrbTotDl() and fill_RRU_PrbTotUl() in openair2/E2AP/RAN_FUNCTION/O-RAN/ran_func_kpm_subs.c (lines 182 and 197) compute PRB usage percentages by dividing by the difference of two consecutive total_prb_aggregate samples without checking for zero. When a malicious xApp sends a high volume of E42_RIC_SUBSCRIPTION_REQUESTs via the FlexRIC iApp (port 36422/SCTP), the E2 Agent generates KPM Indication reports at high frequency. If two consecutive sampling intervals yield identical PRB aggregate values, the divisor becomes zero, triggering SIGFPE and crashing the entire 5G base station process (nr-softmodem). This results in complete 5G cell service interruption for all connected UEs. No authentication is required.

Weakness: CWE-369 (Divide By Zero)

## Which versions are affected by CVE-2026-37232?

It affects 1 product.


Products: Openairinterface Openairinterface5g.

## How do I fix CVE-2026-37232?

No fix has been published for CVE-2026-37232 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-37232 being exploited?

There is no known exploitation of CVE-2026-37232 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2025-26265](https://insights.sbomify.com/CVE-2025-26265/): Denial of service in n/a (medium 6.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-37232 and fix it if it is affected.

What it is: CVE-2026-37232 is a high-severity denial of service vulnerability in n/a, published on 1 Jun 2026. 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-2026-37232 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-2026-37232/ (Markdown: https://insights.sbomify.com/CVE-2026-37232/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-37232
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-37232
- OSV: https://osv.dev/vulnerability/CVE-2026-37232

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-37232/
Summaries are generated and may contain mistakes; the official description above is the record.