UBUNTU-CVE-2025-40140
In the Linux kernel, the following vulnerability has been resolved: net: usb: Remove disruptive netif_wake_queue in rtl8150_set_multicast syzbot reported WARNING in rtl8150_start_xmit/usb_submit_urb. This is the sequence of events that leads to the warning: rtl8150_start_xmit() { netif_stop_queue(); usb_submit_urb(dev->tx_urb); } rtl8150_set_multicast() { netif_stop_queue(); netif_wake_queue(); <-- wakes up TX queue before URB is done } rtl8150_start_xmit() { netif_stop_queue(); usb_submit_urb(dev->tx_urb); <-- double submission } rtl8150_set_multicast being the ndo_set_rx_mode callback should not be calling netif_stop_queue and notif_start_queue as these handle TX queue synchronization. The net core function dev_set_rx_mode handles the synchronization for rtl8150_set_multicast making it safe to remove these locks.
02 / AFFECTED SOFTWARE
Affected packages
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03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
In the Linux kernel, the following vulnerability has been resolved: net: usb: Remove disruptive netif_wake_queue in rtl8150_set_multicast syzbot reported WARNING in rtl8150_start_xmit/usb_submit_urb. This is the sequence of events that leads to the warning: rtl8150_start_xmit() { netif_stop_queue(); usb_submit_urb(dev->tx_urb); } rtl8150_set_multicast() { netif_stop_queue(); netif_wake_queue(); <-- wakes up TX queue before URB is done } rtl8150_start_xmit() { netif_stop_queue(); usb_submit_urb(dev->tx_urb); <-- double submission } rtl8150_set_multicast being the ndo_set_rx_mode callback should not be calling netif_stop_queue and notif_start_queue as these handle TX queue synchronization. The net core function dev_set_rx_mode handles the synchronization for rtl8150_set_multicast making it safe to remove these locks.
05 / REFERENCES
Further evidence
- https://git.kernel.org/linus/958baf5eaee394e5fd976979b0791a875f14a179
- https://git.kernel.org/stable/c/114e05344763a102a8844efd96ec06ba99293ccd
- https://git.kernel.org/stable/c/1a08a37ac03d07a1608a1592791041cac979fbc3
- https://git.kernel.org/stable/c/54f8ef1a970a8376e5846ed90854decf7c00555d
- https://git.kernel.org/stable/c/6053e47bbf212b93c051beb4261d7d5a409d0ce3
- https://git.kernel.org/stable/c/6394bade9daab8e318c165fe43bba012bf13cd8e
- https://git.kernel.org/stable/c/958baf5eaee394e5fd976979b0791a875f14a179
- https://git.kernel.org/stable/c/9d72df7f5eac946f853bf49c428c4e87a17d91da
- https://git.kernel.org/stable/c/cce3c0e21cdd15bcba5c35d3af1700186de8f187
- https://ubuntu.com/security/CVE-2025-40140
- https://ubuntu.com/security/notices/USN-8029-1
- https://ubuntu.com/security/notices/USN-8029-2
- https://ubuntu.com/security/notices/USN-8029-3
- https://ubuntu.com/security/notices/USN-8030-1
- https://ubuntu.com/security/notices/USN-8033-1
- https://ubuntu.com/security/notices/USN-8033-2
- https://ubuntu.com/security/notices/USN-8033-3
- https://ubuntu.com/security/notices/USN-8033-4
- https://ubuntu.com/security/notices/USN-8033-5
- https://ubuntu.com/security/notices/USN-8033-6
- https://ubuntu.com/security/notices/USN-8033-7
- https://ubuntu.com/security/notices/USN-8033-8
- https://ubuntu.com/security/notices/USN-8034-1
- https://ubuntu.com/security/notices/USN-8034-2
- https://ubuntu.com/security/notices/USN-8048-1
- https://ubuntu.com/security/notices/USN-8095-1
- https://ubuntu.com/security/notices/USN-8095-2
- https://ubuntu.com/security/notices/USN-8095-3
- https://ubuntu.com/security/notices/USN-8095-4
- https://ubuntu.com/security/notices/USN-8095-5
- https://ubuntu.com/security/notices/USN-8100-1
- https://ubuntu.com/security/notices/USN-8125-1
- https://ubuntu.com/security/notices/USN-8126-1
- https://ubuntu.com/security/notices/USN-8141-1
- https://ubuntu.com/security/notices/USN-8163-1
- https://ubuntu.com/security/notices/USN-8163-2
- https://ubuntu.com/security/notices/USN-8165-1
- https://ubuntu.com/security/notices/USN-8243-1
- https://ubuntu.com/security/notices/USN-8261-1
- https://www.cve.org/CVERecord?id=CVE-2025-40140