In the Linux kernel, the following vulnerability has been resolved:
RDMA/mlx5: Fix UMR hang in LAG error state unload
During firmware reset in LAG mode, a race condition causes the driver to hang indefinitely while waiting for UMR completion during device unload. See [1].
In LAG mode the bond device is only registered on the master, so it never sees sys_error events from the slave. During firmware reset this causes UMR waits to hang forever on unload as the slave is dead but the master hasn't entered error state yet, so UMR posts succeed but completions never arrive.
Fix this by adding a sys_error notifier that gets registered before MLX5_IB_STAGE_IB_REG and stays alive until after ib_unregister_device(). This ensures error events reach the bond device throughout teardown.
[1] Call Trace: __schedule+0x2bd/0x760 schedule+0x37/0xa0 schedule_preempt_disabled+0xa/0x10 __mutex_lock.isra.6+0x2b5/0x4a0 __mlx5_ib_dereg_mr+0x606/0x870 [mlx5_ib] ? __xa_erase+0x4a/0xa0 ? _cond_resched+0x15/0x30 ? wait_for_completion+0x31/0x100 ib_dereg_mr_user+0x48/0xc0 [ib_core] ? rdmacg_uncharge_hierarchy+0xa0/0x100 destroy_hw_idr_uobject+0x20/0x50 [ib_uverbs] uverbs_destroy_uobject+0x37/0x150 [ib_uverbs] __uverbs_cleanup_ufile+0xda/0x140 [ib_uverbs] uverbs_destroy_ufile_hw+0x3a/0xf0 [ib_uverbs] ib_uverbs_remove_one+0xc3/0x140 [ib_uverbs] remove_client_context+0x8b/0xd0 [ib_core] disable_device+0x8c/0x130 [ib_core] __ib_unregister_device+0x10d/0x180 [ib_core] ib_unregister_device+0x21/0x30 [ib_core] __mlx5_ib_remove+0x1e4/0x1f0 [mlx5_ib] auxiliary_bus_remove+0x1e/0x30 device_release_driver_internal+0x103/0x1f0 bus_remove_device+0xf7/0x170 device_del+0x181/0x410 mlx5_rescan_drivers_locked.part.10+0xa9/0x1d0 [mlx5_core] mlx5_disable_lag+0x253/0x260 [mlx5_core] mlx5_lag_disable_change+0x89/0xc0 [mlx5_core] mlx5_eswitch_disable+0x67/0xa0 [mlx5_core] mlx5_unload+0x15/0xd0 [mlx5_core] mlx5_unload_one+0x71/0xc0 [mlx5_core] mlx5_sync_reset_reload_work+0x83/0x100 [mlx5_core] process_one_work+0x1a7/0x360 worker_thread+0x30/0x390 ? create_worker+0x1a0/0x1a0 kthread+0x116/0x130 ? kthread_flush_work_fn+0x10/0x10 ret_from_fork+0x22/0x40
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 |
|---|---|---|---|---|
| Debian | — | Upgrade linux | Jul 23, 2026 | Jul 23, 2026 |
| Redhat_linux | — | No solution exists | Jul 17, 2026 | May 27, 2026 |
| Ubuntu | — | Upgrade linux-image-6.8.0-1060-aws-fipsUpgrade linux-image-azure-fips-6.8Upgrade linux-image-nvidia-lowlatency-6.8Upgrade linux-image-gcp-64k-6.8Upgrade linux-image-xilinxUpgrade linux-image-6.8.0-1029-nvidia-tegraUpgrade linux-image-6.8.0-1032-xilinxUpgrade linux-image-nvidia-64k-6.8Upgrade linux-image-nvidia-lowlatency-64kUpgrade linux-image-oem-20.04Upgrade linux-image-intel-iot-realtimeUpgrade linux-image-intel-iotgUpgrade linux-image-fips-6.8Upgrade linux-image-genericUpgrade linux-image-nvidia-64kUpgrade linux-image-6.8.0-1057-oracle-64kUpgrade linux-image-generic-lpaeUpgrade linux-image-lowlatency-64k-hwe-22.04Upgrade linux-image-generic-6.8Upgrade linux-image-nvidia-lowlatency-64k-6.8Upgrade linux-image-nvidia-tegra-rt-6.8Upgrade linux-image-6.8.0-1060-raspiUpgrade linux-image-aws-64kUpgrade linux-image-6.8.0-1060-awsUpgrade linux-image-6.8.0-2049-raspi-realtimeUpgrade linux-image-realtimeUpgrade linux-image-oem-20.04dUpgrade linux-image-raspi-realtimeUpgrade linux-image-6.8.0-136-genericUpgrade linux-image-6.8.0-1058-gkeUpgrade linux-image-gkeopUpgrade linux-image-nvidia-hwe-22.04Upgrade linux-image-generic-64k-hwe-22.04Upgrade linux-image-azure-fde-6.8Upgrade linux-image-6.8.0-134-generic-64kUpgrade linux-image-6.8.0-1045-gkeopUpgrade linux-image-6.8.0-1058-nvidiaUpgrade linux-image-6.8.0-1063-gcp-fipsUpgrade linux-image-gcp-lts-24.04Upgrade linux-image-oracle-64kUpgrade linux-image-generic-hwe-22.04Upgrade linux-image-oem-22.04bUpgrade linux-image-6.8.0-134-fipsUpgrade linux-image-nvidia-64k-hwe-22.04Upgrade linux-image-6.8.0-1058-nvidia-lowlatency-64kUpgrade linux-image-gkeUpgrade linux-image-gkeop-6.8Upgrade linux-image-awsUpgrade linux-image-virtualUpgrade linux-image-xilinx-zynqmpUpgrade linux-image-6.8.0-134-lowlatency-64kUpgrade linux-image-azure-6.8Upgrade linux-image-oracleUpgrade linux-image-gcpUpgrade linux-image-lowlatency-64k-6.8Upgrade linux-image-gcp-fips-6.8Upgrade linux-image-realtime-hwe-22.04Upgrade linux-image-gcp-6.8Upgrade linux-image-aws-fips-6.8Upgrade linux-image-oem-20.04bUpgrade linux-image-aws-64k-6.8Upgrade linux-image-oem-22.04aUpgrade linux-image-oem-22.04cUpgrade linux-image-lowlatencyUpgrade linux-image-nvidia-6.8Upgrade linux-image-lowlatency-6.8Upgrade linux-image-nvidia-tegra-rtUpgrade linux-image-laptop-23.10Upgrade linux-image-aws-lts-24.04Upgrade linux-image-raspi-6.8Upgrade linux-image-gke-64kUpgrade linux-image-6.8.1-1055-realtimeUpgrade linux-image-nvidia-lowlatencyUpgrade linux-image-azure-fdeUpgrade linux-image-lowlatency-64kUpgrade linux-image-gcp-fipsUpgrade linux-image-fipsUpgrade linux-image-6.8.0-134-genericUpgrade linux-image-6.8.0-1063-gcp-64kUpgrade linux-image-6.8.0-1058-gke-64kUpgrade linux-image-raspi-realtime-6.8Upgrade linux-image-6.8.0-1060-ibmUpgrade linux-image-6.8.0-1062-azure-fipsUpgrade linux-image-gcp-64kUpgrade linux-image-6.8.0-1063-azureUpgrade linux-image-6.8.0-1029-nvidia-tegra-rtUpgrade linux-image-oem-22.04Upgrade linux-image-gke-64k-6.8Upgrade linux-image-oracle-lts-24.04Upgrade linux-image-nvidia-tegraUpgrade linux-image-gcp-64k-lts-24.04Upgrade linux-image-aws-fipsUpgrade linux-image-6.8.0-1063-gcpUpgrade linux-image-aws-64k-lts-24.04Upgrade linux-image-aws-6.8Upgrade linux-image-ibm-lts-24.04Upgrade linux-image-ibm-classicUpgrade linux-image-6.8.0-1062-azure-fdeUpgrade linux-image-6.8.0-1058-nvidia-lowlatencyUpgrade linux-image-kvmUpgrade linux-image-raspiUpgrade linux-image-lowlatency-hwe-22.04Upgrade linux-image-6.8.0-1058-nvidia-64kUpgrade linux-image-oracle-64k-lts-24.04Upgrade linux-image-6.8.0-1060-aws-64kUpgrade linux-image-nvidiaUpgrade linux-image-ibmUpgrade linux-image-oem-22.04dUpgrade linux-image-generic-64kUpgrade linux-image-6.8.0-134-lowlatencyUpgrade linux-image-virtual-hwe-22.04Upgrade linux-image-virtual-6.8Upgrade linux-image-oracle-64k-6.8Upgrade linux-image-oracle-6.8Upgrade linux-image-ibm-6.8Upgrade linux-image-azure-fipsUpgrade linux-image-oem-20.04cUpgrade linux-image-generic-64k-6.8Upgrade linux-image-gke-6.8Upgrade linux-image-azure-lts-24.04Upgrade linux-image-azure-fde-lts-24.04Upgrade linux-image-azureUpgrade linux-image-nvidia-tegra-6.8Upgrade linux-image-6.8.0-136-generic-64kUpgrade linux-image-6.8.0-1057-oracleUpgrade linux-image-xilinx-6.8Upgrade linux-image-realtime-6.8.1 | Jul 2, 2026 | Jul 1, 2026 |
Prioritise with Active Threat Intelligence
With curated Threat Intelligence, you can see which vulnerabilities truly put you at risk, prioritize what matters most, and act before attackers do.
Explore Intelligence Hub