In the Linux kernel, the following vulnerability has been resolved:
USB: usbtmc: Fix direction for 0-length ioctl control messages
The syzbot fuzzer found a problem in the usbtmc driver: When a user submits an ioctl for a 0-length control transfer, the driver does not check that the direction is set to OUT:
------------[ cut here ]------------ usb 3-1: BOGUS control dir, pipe 80000b80 doesn't match bRequestType fd WARNING: CPU: 0 PID: 5100 at drivers/usb/core/urb.c:411 usb_submit_urb+0x14a7/0x1880 drivers/usb/core/urb.c:411 Modules linked in: CPU: 0 PID: 5100 Comm: syz-executor428 Not tainted 6.3.0-syzkaller-12049-g58390c8ce1bd #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023 RIP: 0010:usb_submit_urb+0x14a7/0x1880 drivers/usb/core/urb.c:411 Code: 7c 24 40 e8 1b 13 5c fb 48 8b 7c 24 40 e8 21 1d f0 fe 45 89 e8 44 89 f1 4c 89 e2 48 89 c6 48 c7 c7 e0 b5 fc 8a e8 19 c8 23 fb <0f> 0b e9 9f ee ff ff e8 ed 12 5c fb 0f b6 1d 12 8a 3c 08 31 ff 41 RSP: 0018:ffffc90003d2fb00 EFLAGS: 00010282 RAX: 0000000000000000 RBX: ffff8880789e9058 RCX: 0000000000000000 RDX: ffff888029593b80 RSI: ffffffff814c1447 RDI: 0000000000000001 RBP: ffff88801ea742f8 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000001 R12: ffff88802915e528 R13: 00000000000000fd R14: 0000000080000b80 R15: ffff8880222b3100 FS: 0000555556ca63c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f9ef4d18150 CR3: 0000000073e5b000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> usb_start_wait_urb+0x101/0x4b0 drivers/usb/core/message.c:58 usb_internal_control_msg drivers/usb/core/message.c:102 [inline] usb_control_msg+0x320/0x4a0 drivers/usb/core/message.c:153 usbtmc_ioctl_request drivers/usb/class/usbtmc.c:1954 [inline] usbtmc_ioctl+0x1b3d/0x2840 drivers/usb/class/usbtmc.c:2097
To fix this, we must override the direction in the bRequestType field of the control request structure when the length is 0.
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade kernel-debuginfoUpgrade python-perf-debuginfoUpgrade kernel-livepatch-5.10.184-174.730Upgrade kernelUpgrade kernel-headersUpgrade kernel-tools-debuginfoUpgrade bpftool-debuginfoUpgrade kernel-debuginfo-common-x86_64Upgrade perf-debuginfoUpgrade bpftoolUpgrade python-perfUpgrade kernel-toolsUpgrade kernel-tools-develUpgrade kernel-develUpgrade kernel-debuginfo-common-aarch64Upgrade perf | May 20, 2026 | May 20, 2026 |
| Debian | — | Upgrade linux | Dec 9, 2025 | Dec 9, 2025 |
| Huawei Euleros 2_0_sp13 | — | Upgrade kernel-toolsUpgrade kernel-tools-libsUpgrade kernel-abi-stablelistsUpgrade bpftoolUpgrade kernelUpgrade python3-perf | Mar 10, 2026 | Mar 10, 2026 |
| Redhat_linux | — | No solution exists | Jul 17, 2026 | Dec 8, 2025 |
| Ubuntu | — | Upgrade linux-kvmUpgrade linux-awsUpgrade linux-aws-5.4Upgrade linux-nvidiaUpgrade linux-raspiUpgrade linux-gcp-5.15Upgrade linux-ibmUpgrade linux-oracleUpgrade linux-realtimeUpgrade linux-aws-5.15Upgrade linux-hwe-5.15Upgrade linux-lowlatency-hwe-5.15Upgrade linux-hwe-5.4Upgrade linux-azure-5.15Upgrade linux-iotUpgrade linux-lowlatencyUpgrade linux-azure-fde-5.15Upgrade linux-azure-5.4Upgrade linux-intel-iotg-5.15Upgrade linux-aws-fipsUpgrade linux-gcp-fipsUpgrade linux-azureUpgrade linux-bluefieldUpgrade linux-xilinx-zynqmpUpgrade linux-gcp-5.4Upgrade linux-riscv-5.15Upgrade linuxUpgrade linux-oracle-5.15Upgrade linux-nvidia-tegra-igxUpgrade linux-gcpUpgrade linux-fipsUpgrade linux-raspi-5.4Upgrade linux-azure-fipsUpgrade linux-ibm-5.4Upgrade linux-gkeUpgrade linux-nvidia-tegra-5.15Upgrade linux-oracle-5.4Upgrade linux-gkeopUpgrade linux-intel-iotgUpgrade linux-ibm-5.15Upgrade linux-nvidia-tegraUpgrade linux-intel-iot-realtime | Dec 10, 2025 | Dec 8, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | May 27, 2026 | Dec 8, 2025 |
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