In the Linux kernel, the following vulnerability has been resolved:
net: usbnet: Fix WARNING in usbnet_start_xmit/usb_submit_urb
The syzbot fuzzer identified a problem in the usbnet driver:
usb 1-1: BOGUS urb xfer, pipe 3 != type 1 WARNING: CPU: 0 PID: 754 at drivers/usb/core/urb.c:504 usb_submit_urb+0xed6/0x1880 drivers/usb/core/urb.c:504 Modules linked in: CPU: 0 PID: 754 Comm: kworker/0:2 Not tainted 6.4.0-rc7-syzkaller-00014-g692b7dc87ca6 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 Workqueue: mld mld_ifc_work RIP: 0010:usb_submit_urb+0xed6/0x1880 drivers/usb/core/urb.c:504 Code: 7c 24 18 e8 2c b4 5b fb 48 8b 7c 24 18 e8 42 07 f0 fe 41 89 d8 44 89 e1 4c 89 ea 48 89 c6 48 c7 c7 a0 c9 fc 8a e8 5a 6f 23 fb <0f> 0b e9 58 f8 ff ff e8 fe b3 5b fb 48 81 c5 c0 05 00 00 e9 84 f7 RSP: 0018:ffffc9000463f568 EFLAGS: 00010086 RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000 RDX: ffff88801eb28000 RSI: ffffffff814c03b7 RDI: 0000000000000001 RBP: ffff8881443b7190 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000003 R13: ffff88802a77cb18 R14: 0000000000000003 R15: ffff888018262500 FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000556a99c15a18 CR3: 0000000028c71000 CR4: 0000000000350ef0 Call Trace: <TASK> usbnet_start_xmit+0xfe5/0x2190 drivers/net/usb/usbnet.c:1453 __netdev_start_xmit include/linux/netdevice.h:4918 [inline] netdev_start_xmit include/linux/netdevice.h:4932 [inline] xmit_one net/core/dev.c:3578 [inline] dev_hard_start_xmit+0x187/0x700 net/core/dev.c:3594 ...
This bug is caused by the fact that usbnet trusts the bulk endpoint addresses its probe routine receives in the driver_info structure, and it does not check to see that these endpoints actually exist and have the expected type and directions.
The fix is simply to add such a check.
CVSS Details
- CVSS 3.1 Base Score: 5.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade kernel-debuginfoUpgrade python-perf-debuginfoUpgrade kernel-tools-debuginfoUpgrade kernel-debuginfo-common-aarch64Upgrade perfUpgrade python-perfUpgrade kernel-develUpgrade bpftool-debuginfoUpgrade perf-debuginfoUpgrade kernel-headersUpgrade kernel-toolsUpgrade bpftoolUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-tools-develUpgrade kernelUpgrade kernel-livepatch-4.14.322-244.536Upgrade kernel-livepatch-5.10.192-182.736 | May 20, 2026 | May 20, 2026 |
| Debian | — | Upgrade linux | Oct 6, 2025 | Oct 6, 2025 |
| Huawei Euleros 2_0_sp10 | — | Upgrade python3-perfUpgrade kernel-toolsUpgrade kernel-tools-libsUpgrade kernelUpgrade kernel-abi-stablelists | Jan 15, 2026 | Jan 13, 2026 |
| Huawei Euleros 2_0_sp11 | — | Upgrade bpftoolUpgrade kernel-toolsUpgrade python3-perfUpgrade kernelUpgrade kernel-tools-libsUpgrade kernel-abi-stablelists | Mar 17, 2026 | Mar 17, 2026 |
| Huawei Euleros 2_0_sp13 | — | Upgrade kernel-toolsUpgrade kernel-abi-stablelistsUpgrade kernel-tools-libsUpgrade python3-perfUpgrade bpftoolUpgrade kernel | Feb 3, 2026 | Jan 30, 2026 |
| Redhat_linux | — | No solution exists | Jul 17, 2026 | Oct 4, 2025 |
| Ubuntu | — | Upgrade linuxUpgrade linux-ibm-5.15Upgrade linux-bluefieldUpgrade linux-gkeUpgrade linux-awsUpgrade linux-intel-iot-realtimeUpgrade linux-raspiUpgrade linux-oracle-5.4Upgrade linux-gcpUpgrade linux-lowlatency-hwe-5.15Upgrade linux-ibm-5.4Upgrade linux-raspi-5.4Upgrade linux-aws-5.4Upgrade linux-aws-5.15Upgrade linux-nvidia-tegra-5.15Upgrade linux-nvidia-tegraUpgrade linux-intel-iotg-5.15Upgrade linux-azure-5.15Upgrade linux-azure-fde-5.15Upgrade linux-hwe-5.4Upgrade linux-aws-fipsUpgrade linux-fipsUpgrade linux-realtimeUpgrade linux-azure-fipsUpgrade linux-nvidiaUpgrade linux-gcp-fipsUpgrade linux-oracleUpgrade linux-gcp-5.15Upgrade linux-azure-5.4Upgrade linux-oracle-5.15Upgrade linux-riscv-5.15Upgrade linux-intel-iotgUpgrade linux-iotUpgrade linux-gcp-5.4Upgrade linux-kvmUpgrade linux-nvidia-tegra-igxUpgrade linux-lowlatencyUpgrade linux-ibmUpgrade linux-xilinx-zynqmpUpgrade linux-hwe-5.15Upgrade linux-gkeopUpgrade linux-azure | Oct 10, 2025 | Oct 4, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Oct 15, 2025 | Oct 4, 2025 |
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