In the Linux kernel, the following vulnerability has been resolved:
drm/amd/pm: Disable MMIO access during SMU Mode 1 reset
During Mode 1 reset, the ASIC undergoes a reset cycle and becomes temporarily inaccessible via PCIe. Any attempt to access MMIO registers during this window (e.g., from interrupt handlers or other driver threads) can result in uncompleted PCIe transactions, leading to NMI panics or system hangs.
To prevent this, set the `no_hw_access` flag to true immediately after triggering the reset. This signals other driver components to skip register accesses while the device is offline.
A memory barrier `smp_mb()` is added to ensure the flag update is globally visible to all cores before the driver enters the sleep/wait state.
(cherry picked from commit 7edb503fe4b6d67f47d8bb0dfafb8e699bb0f8a4)
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 | Aug 4, 2026 | Feb 18, 2026 |
| Ubuntu | — | Upgrade linux-image-nvidia-6.8Upgrade linux-image-aws-lts-24.04Upgrade linux-image-nvidia-tegra-rt-6.8Upgrade linux-image-azure-fipsUpgrade linux-image-gcp-fipsUpgrade linux-image-nvidia-hwe-22.04Upgrade linux-image-gkeUpgrade linux-image-kvmUpgrade linux-image-virtual-6.8Upgrade linux-image-realtimeUpgrade linux-image-xilinx-zynqmpUpgrade linux-image-nvidia-lowlatency-64k-6.8Upgrade linux-image-6.8.0-1054-nvidia-64kUpgrade linux-image-6.8.0-1056-raspiUpgrade linux-image-gcp-fips-6.8Upgrade linux-image-aws-64k-lts-24.04Upgrade linux-image-generic-64k-6.8Upgrade linux-image-6.8.0-1024-nvidia-tegra-rtUpgrade linux-image-6.8.0-1056-azureUpgrade linux-image-gke-64kUpgrade linux-image-6.8.1-1051-realtimeUpgrade linux-image-gcp-64k-6.8Upgrade linux-image-gke-64k-6.8Upgrade linux-image-lowlatency-64k-hwe-22.04Upgrade linux-image-realtime-6.8.1Upgrade linux-image-xilinx-6.8Upgrade linux-image-azureUpgrade linux-image-6.8.0-1024-nvidia-tegraUpgrade linux-image-6.8.0-1054-nvidia-lowlatencyUpgrade linux-image-aws-64k-6.8Upgrade linux-image-6.8.0-1058-gcp-fipsUpgrade linux-image-raspiUpgrade linux-image-raspi-6.8Upgrade linux-image-aws-fips-6.8Upgrade linux-image-6.8.0-1054-nvidiaUpgrade linux-image-aws-6.8Upgrade linux-image-lowlatency-64k-6.8Upgrade linux-image-nvidia-64kUpgrade linux-image-nvidia-lowlatencyUpgrade linux-image-intel-iot-realtimeUpgrade linux-image-gcp-6.8Upgrade linux-image-gcp-lts-24.04Upgrade linux-image-realtime-hwe-22.04Upgrade linux-image-ibm-lts-24.04Upgrade linux-image-gke-6.8Upgrade linux-image-6.8.0-117-generic-64kUpgrade linux-image-6.8.0-1032-xilinxUpgrade linux-image-6.8.0-1054-gke-64kUpgrade linux-image-lowlatency-6.8Upgrade linux-image-ibmUpgrade linux-image-aws-fipsUpgrade linux-image-6.8.0-2045-raspi-realtimeUpgrade linux-image-6.8.0-1055-awsUpgrade linux-image-6.8.0-117-genericUpgrade linux-image-6.8.0-1059-azure-fipsUpgrade linux-image-nvidia-64k-6.8Upgrade linux-image-nvidia-tegraUpgrade linux-image-intel-iotgUpgrade linux-image-nvidiaUpgrade linux-image-raspi-realtime-6.8Upgrade linux-image-nvidia-lowlatency-6.8Upgrade linux-image-lowlatencyUpgrade linux-image-6.8.0-1059-azureUpgrade linux-image-xilinxUpgrade linux-image-nvidia-tegra-6.8Upgrade linux-image-nvidia-64k-hwe-22.04Upgrade linux-image-ibm-classicUpgrade linux-image-azure-6.8Upgrade linux-image-6.8.0-1058-gcp-64kUpgrade linux-image-gkeopUpgrade linux-image-ibm-6.8Upgrade linux-image-azure-fips-6.8Upgrade linux-image-virtualUpgrade linux-image-lowlatency-hwe-22.04Upgrade linux-image-generic-64kUpgrade linux-image-6.8.0-1054-nvidia-lowlatency-64kUpgrade linux-image-nvidia-tegra-rtUpgrade linux-image-lowlatency-64kUpgrade linux-image-gcp-64k-lts-24.04Upgrade linux-image-6.8.0-1054-gkeUpgrade linux-image-6.8.0-1041-gkeopUpgrade linux-image-genericUpgrade linux-image-generic-6.8Upgrade linux-image-fipsUpgrade linux-image-azure-lts-24.04Upgrade linux-image-6.8.0-1055-aws-fipsUpgrade linux-image-raspi-realtimeUpgrade linux-image-nvidia-lowlatency-64kUpgrade linux-image-fips-6.8Upgrade linux-image-6.8.0-117-lowlatencyUpgrade linux-image-6.8.0-116-fipsUpgrade linux-image-6.8.0-1055-ibmUpgrade linux-image-6.8.0-117-lowlatency-64kUpgrade linux-image-gkeop-6.8Upgrade linux-image-6.8.0-1055-aws-64kUpgrade linux-image-6.8.0-1058-gcpUpgrade linux-image-generic-lpae | May 25, 2026 | May 19, 2026 |
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