In the Linux kernel, the following vulnerability has been resolved:
net/mlx5: Fix switchdev mode rollback in case of failure
If for some internal reason switchdev mode fails, we rollback to legacy mode, before this patch, rollback will unregister the uplink netdev and leave it unregistered causing the below kernel bug.
To fix this, we need to avoid netdev unregister by setting the proper rollback flag 'MLX5_PRIV_FLAGS_SWITCH_LEGACY' to indicate legacy mode.
devlink (431) used greatest stack depth: 11048 bytes left mlx5_core 0000:00:03.0: E-Switch: Disable: mode(LEGACY), nvfs(0), \ necvfs(0), active vports(0) mlx5_core 0000:00:03.0: E-Switch: Supported tc chains and prios offload mlx5_core 0000:00:03.0: Loading uplink representor for vport 65535 mlx5_core 0000:00:03.0: mlx5_cmd_out_err:816:(pid 456): \ QUERY_HCA_CAP(0x100) op_mod(0x0) failed, \ status bad parameter(0x3), syndrome (0x3a3846), err(-22) mlx5_core 0000:00:03.0 enp0s3np0 (unregistered): Unloading uplink \ representor for vport 65535 ------------[ cut here ]------------ kernel BUG at net/core/dev.c:12070! Oops: invalid opcode: 0000 [#1] SMP NOPTI CPU: 2 UID: 0 PID: 456 Comm: devlink Not tainted 6.16.0-rc3+ \ #9 PREEMPT(voluntary) RIP: 0010:unregister_netdevice_many_notify+0x123/0xae0 ... Call Trace: [ 90.923094] unregister_netdevice_queue+0xad/0xf0 [ 90.923323] unregister_netdev+0x1c/0x40 [ 90.923522] mlx5e_vport_rep_unload+0x61/0xc6 [ 90.923736] esw_offloads_enable+0x8e6/0x920 [ 90.923947] mlx5_eswitch_enable_locked+0x349/0x430 [ 90.924182] ? is_mp_supported+0x57/0xb0 [ 90.924376] mlx5_devlink_eswitch_mode_set+0x167/0x350 [ 90.924628] devlink_nl_eswitch_set_doit+0x6f/0xf0 [ 90.924862] genl_family_rcv_msg_doit+0xe8/0x140 [ 90.925088] genl_rcv_msg+0x18b/0x290 [ 90.925269] ? __pfx_devlink_nl_pre_doit+0x10/0x10 [ 90.925506] ? __pfx_devlink_nl_eswitch_set_doit+0x10/0x10 [ 90.925766] ? __pfx_devlink_nl_post_doit+0x10/0x10 [ 90.926001] ? __pfx_genl_rcv_msg+0x10/0x10 [ 90.926206] netlink_rcv_skb+0x52/0x100 [ 90.926393] genl_rcv+0x28/0x40 [ 90.926557] netlink_unicast+0x27d/0x3d0 [ 90.926749] netlink_sendmsg+0x1f7/0x430 [ 90.926942] __sys_sendto+0x213/0x220 [ 90.927127] ? __sys_recvmsg+0x6a/0xd0 [ 90.927312] __x64_sys_sendto+0x24/0x30 [ 90.927504] do_syscall_64+0x50/0x1c0 [ 90.927687] entry_SYSCALL_64_after_hwframe+0x76/0x7e [ 90.927929] RIP: 0033:0x7f7d0363e047
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linux | Jul 23, 2026 | Jul 23, 2026 |
| Redhat_linux | — | No solution exists | Jul 17, 2026 | May 1, 2026 |
| Ubuntu | — | Upgrade linux-image-gcpUpgrade linux-image-6.8.0-1030-nvidia-tegraUpgrade linux-image-aws-lts-24.04Upgrade linux-image-6.8.0-1063-azureUpgrade linux-image-raspiUpgrade linux-image-xilinxUpgrade linux-image-6.8.0-1059-gke-64kUpgrade linux-image-generic-6.8Upgrade linux-image-oem-20.04cUpgrade linux-image-oem-22.04bUpgrade linux-image-generic-64kUpgrade linux-image-nvidiaUpgrade linux-image-virtual-hwe-22.04Upgrade linux-image-generic-hwe-22.04Upgrade linux-image-6.8.0-1061-aws-fipsUpgrade linux-image-oem-22.04cUpgrade linux-image-raspi-realtime-6.8Upgrade linux-image-aws-6.8Upgrade linux-image-aws-64k-6.8Upgrade linux-image-laptop-23.10Upgrade linux-image-nvidia-64kUpgrade linux-image-intel-iot-realtimeUpgrade linux-image-oem-22.04dUpgrade linux-image-oracle-6.8Upgrade linux-image-raspi-6.8Upgrade linux-image-nvidia-tegraUpgrade linux-image-6.8.0-1046-gkeopUpgrade linux-image-realtime-6.8.1Upgrade linux-image-6.8.0-136-generic-64kUpgrade linux-image-oem-20.04bUpgrade linux-image-6.8.0-1064-gcpUpgrade linux-image-genericUpgrade linux-image-gkeUpgrade linux-image-gcp-64kUpgrade linux-image-oracle-64k-lts-24.04Upgrade linux-image-6.8.0-1061-aws-64kUpgrade linux-image-6.8.0-1061-ibmUpgrade linux-image-oracle-lts-24.04Upgrade linux-image-6.8.0-136-genericUpgrade linux-image-fips-6.8Upgrade linux-image-realtime-hwe-22.04Upgrade linux-image-aws-64kUpgrade linux-image-xilinx-6.8Upgrade linux-image-oracle-64kUpgrade linux-image-6.8.0-1063-azure-fipsUpgrade linux-image-6.8.0-136-lowlatency-64kUpgrade linux-image-6.8.0-1059-nvidiaUpgrade linux-image-gcp-lts-24.04Upgrade linux-image-oem-20.04dUpgrade linux-image-6.8.0-1059-nvidia-lowlatency-64kUpgrade linux-image-gcp-fips-6.8Upgrade linux-image-azure-fips-6.8Upgrade linux-image-oem-22.04aUpgrade linux-image-azure-6.8Upgrade linux-image-virtual-6.8Upgrade linux-image-6.8.0-1062-azure-fdeUpgrade linux-image-aws-fips-6.8Upgrade linux-image-azureUpgrade linux-image-kvmUpgrade linux-image-lowlatency-64k-hwe-22.04Upgrade linux-image-nvidia-lowlatency-6.8Upgrade linux-image-raspi-realtimeUpgrade linux-image-oracle-64k-6.8Upgrade linux-image-gke-64k-6.8Upgrade linux-image-ibm-6.8Upgrade linux-image-6.8.0-1058-oracleUpgrade linux-image-intel-iotgUpgrade linux-image-gcp-fipsUpgrade linux-image-gke-6.8Upgrade linux-image-gkeopUpgrade linux-image-ibmUpgrade linux-image-aws-fipsUpgrade linux-image-azure-fipsUpgrade linux-image-xilinx-zynqmpUpgrade linux-image-virtualUpgrade linux-image-6.8.0-2050-raspi-realtimeUpgrade linux-image-6.8.0-1061-awsUpgrade linux-image-oem-22.04Upgrade linux-image-nvidia-tegra-6.8Upgrade linux-image-azure-fde-lts-24.04Upgrade linux-image-awsUpgrade linux-image-lowlatencyUpgrade linux-image-lowlatency-64kUpgrade linux-image-generic-64k-hwe-22.04Upgrade linux-image-nvidia-64k-6.8Upgrade linux-image-6.8.0-1059-nvidia-lowlatencyUpgrade linux-image-nvidia-tegra-rtUpgrade linux-image-gcp-64k-6.8Upgrade linux-image-azure-lts-24.04Upgrade linux-image-6.8.0-136-lowlatencyUpgrade linux-image-nvidia-lowlatencyUpgrade linux-image-6.8.0-1064-gcp-64kUpgrade linux-image-realtimeUpgrade linux-image-nvidia-6.8Upgrade linux-image-generic-64k-6.8Upgrade linux-image-ibm-classicUpgrade linux-image-gcp-6.8Upgrade linux-image-azure-fde-6.8Upgrade linux-image-6.8.0-1059-nvidia-64kUpgrade linux-image-nvidia-lowlatency-64k-6.8Upgrade linux-image-azure-fdeUpgrade linux-image-6.8.0-136-fipsUpgrade linux-image-nvidia-lowlatency-64kUpgrade linux-image-gkeop-6.8Upgrade linux-image-gke-64kUpgrade linux-image-6.8.0-1061-raspiUpgrade linux-image-lowlatency-6.8Upgrade linux-image-6.8.1-1056-realtimeUpgrade linux-image-ibm-lts-24.04Upgrade linux-image-generic-lpaeUpgrade linux-image-6.8.0-1059-gkeUpgrade linux-image-6.8.0-1030-nvidia-tegra-rtUpgrade linux-image-oem-20.04Upgrade linux-image-lowlatency-64k-6.8Upgrade linux-image-gcp-64k-lts-24.04Upgrade linux-image-6.8.0-1064-gcp-fipsUpgrade linux-image-nvidia-tegra-rt-6.8Upgrade linux-image-lowlatency-hwe-22.04Upgrade linux-image-6.8.0-1033-xilinxUpgrade linux-image-oracleUpgrade linux-image-fipsUpgrade linux-image-6.8.0-1058-oracle-64kUpgrade linux-image-nvidia-hwe-22.04Upgrade linux-image-nvidia-64k-hwe-22.04Upgrade linux-image-aws-64k-lts-24.04 | May 25, 2026 | May 1, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jul 10, 2026 | May 1, 2026 |
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