In the Linux kernel, the following vulnerability has been resolved:
net/net_failover: fix txq exceeding warning
The failover txq is inited as 16 queues. when a packet is transmitted from the failover device firstly, the failover device will select the queue which is returned from the primary device if the primary device is UP and running. If the primary device txq is bigger than the default 16, it can lead to the following warning: eth0 selects TX queue 18, but real number of TX queues is 16
The warning backtrace is: [ 32.146376] CPU: 18 PID: 9134 Comm: chronyd Tainted: G E 6.2.8-1.el7.centos.x86_64 #1 [ 32.147175] Hardware name: Red Hat KVM, BIOS 1.10.2-3.el7_4.1 04/01/2014 [ 32.147730] Call Trace: [ 32.147971] <TASK> [ 32.148183] dump_stack_lvl+0x48/0x70 [ 32.148514] dump_stack+0x10/0x20 [ 32.148820] netdev_core_pick_tx+0xb1/0xe0 [ 32.149180] __dev_queue_xmit+0x529/0xcf0 [ 32.149533] ? __check_object_size.part.0+0x21c/0x2c0 [ 32.149967] ip_finish_output2+0x278/0x560 [ 32.150327] __ip_finish_output+0x1fe/0x2f0 [ 32.150690] ip_finish_output+0x2a/0xd0 [ 32.151032] ip_output+0x7a/0x110 [ 32.151337] ? __pfx_ip_finish_output+0x10/0x10 [ 32.151733] ip_local_out+0x5e/0x70 [ 32.152054] ip_send_skb+0x19/0x50 [ 32.152366] udp_send_skb.isra.0+0x163/0x3a0 [ 32.152736] udp_sendmsg+0xba8/0xec0 [ 32.153060] ? __folio_memcg_unlock+0x25/0x60 [ 32.153445] ? __pfx_ip_generic_getfrag+0x10/0x10 [ 32.153854] ? sock_has_perm+0x85/0xa0 [ 32.154190] inet_sendmsg+0x6d/0x80 [ 32.154508] ? inet_sendmsg+0x6d/0x80 [ 32.154838] sock_sendmsg+0x62/0x70 [ 32.155152] ____sys_sendmsg+0x134/0x290 [ 32.155499] ___sys_sendmsg+0x81/0xc0 [ 32.155828] ? _get_random_bytes.part.0+0x79/0x1a0 [ 32.156240] ? ip4_datagram_release_cb+0x5f/0x1e0 [ 32.156649] ? get_random_u16+0x69/0xf0 [ 32.156989] ? __fget_light+0xcf/0x110 [ 32.157326] __sys_sendmmsg+0xc4/0x210 [ 32.157657] ? __sys_connect+0xb7/0xe0 [ 32.157995] ? __audit_syscall_entry+0xce/0x140 [ 32.158388] ? syscall_trace_enter.isra.0+0x12c/0x1a0 [ 32.158820] __x64_sys_sendmmsg+0x24/0x30 [ 32.159171] do_syscall_64+0x38/0x90 [ 32.159493] entry_SYSCALL_64_after_hwframe+0x72/0xdc
Fix that by reducing txq number as the non-existent primary-dev does.
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade perfUpgrade kernel-toolsUpgrade kernel-debuginfo-common-aarch64Upgrade perf-debuginfoUpgrade kernel-develUpgrade kernel-tools-develUpgrade kernelUpgrade kernel-livepatch-5.15.106-64.140Upgrade kernel-debuginfoUpgrade python-perf-debuginfoUpgrade kernel-tools-debuginfoUpgrade python-perfUpgrade kernel-debuginfo-common-x86_64Upgrade bpftoolUpgrade kernel-livepatch-5.10.177-158.645Upgrade bpftool-debuginfoUpgrade kernel-headers | May 20, 2026 | May 20, 2026 |
| Amazon_linux_2023 | — | Upgrade kernel-headersUpgrade kernel-libbpfUpgrade kernelUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-libbpf-develUpgrade perf-debuginfoUpgrade bpftool-debuginfoUpgrade kernel-debuginfoUpgrade kernel-develUpgrade bpftoolUpgrade perfUpgrade kernel-debuginfo-common-aarch64Upgrade kernel-tools-develUpgrade python3-perfUpgrade python3-perf-debuginfoUpgrade kernel-tools-debuginfoUpgrade kernel-libbpf-staticUpgrade kernel-livepatch-6.1.23-36.46Upgrade kernel-tools | Feb 20, 2026 | Dec 30, 2025 |
| Debian | — | Upgrade linux | Dec 31, 2025 | Dec 31, 2025 |
| Huawei Euleros 2_0_sp13 | — | Upgrade kernel-toolsUpgrade bpftoolUpgrade kernel-abi-stablelistsUpgrade kernel-tools-libsUpgrade kernelUpgrade python3-perf | Mar 10, 2026 | Mar 10, 2026 |
| Redhat_linux | — | No solution exists | Jul 17, 2026 | Dec 30, 2025 |
| Ubuntu | — | Upgrade linux-realtimeUpgrade linux-hwe-5.15Upgrade linux-raspi-5.4Upgrade linux-lowlatencyUpgrade linux-bluefieldUpgrade linux-gkeUpgrade linux-azureUpgrade linux-riscv-5.15Upgrade linux-nvidia-tegraUpgrade linux-raspiUpgrade linux-gcp-5.15Upgrade linux-aws-5.15Upgrade linux-awsUpgrade linux-ibm-5.15Upgrade linux-nvidia-tegra-5.15Upgrade linux-lowlatency-hwe-5.15Upgrade linux-fipsUpgrade linux-oracle-5.4Upgrade linux-aws-5.4Upgrade linux-gcpUpgrade linux-iotUpgrade linux-xilinx-zynqmpUpgrade linux-intel-iotgUpgrade linux-intel-iot-realtimeUpgrade linuxUpgrade linux-azure-5.15Upgrade linux-nvidia-tegra-igxUpgrade linux-gcp-5.4Upgrade linux-oracle-5.15Upgrade linux-hwe-5.4Upgrade linux-kvmUpgrade linux-nvidiaUpgrade linux-gkeopUpgrade linux-ibm-5.4Upgrade linux-intel-iotg-5.15Upgrade linux-gcp-fipsUpgrade linux-oracleUpgrade linux-azure-fipsUpgrade linux-aws-fipsUpgrade linux-azure-5.4Upgrade linux-ibm | Jan 6, 2026 | Jan 2, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | May 27, 2026 | Dec 30, 2025 |
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