In the Linux kernel, the following vulnerability has been resolved:
PCI/MSI: Handle lack of irqdomain gracefully
Alexandre observed a warning emitted from pci_msi_setup_msi_irqs() on a RISCV platform which does not provide PCI/MSI support:
WARNING: CPU: 1 PID: 1 at drivers/pci/msi/msi.h:121 pci_msi_setup_msi_irqs+0x2c/0x32 __pci_enable_msix_range+0x30c/0x596 pci_msi_setup_msi_irqs+0x2c/0x32 pci_alloc_irq_vectors_affinity+0xb8/0xe2
RISCV uses hierarchical interrupt domains and correctly does not implement the legacy fallback. The warning triggers from the legacy fallback stub.
That warning is bogus as the PCI/MSI layer knows whether a PCI/MSI parent domain is associated with the device or not. There is a check for MSI-X, which has a legacy assumption. But that legacy fallback assumption is only valid when legacy support is enabled, but otherwise the check should simply return -ENOTSUPP.
Loongarch tripped over the same problem and blindly enabled legacy support without implementing the legacy fallbacks. There are weak implementations which return an error, so the problem was papered over.
Correct pci_msi_domain_supports() to evaluate the legacy mode and add the missing supported check into the MSI enable path to complete it.
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 27, 2026 | Jul 27, 2026 |
| Oracle_linux | — | Upgrade kernel-uek | Apr 15, 2025 | Jan 6, 2025 |
| Redhat_linux | — | Upgrade kernelNo solution existsUpgrade kernel-rt | May 15, 2025 | Jan 6, 2025 |
| Ubuntu | — | Upgrade linux-image-6.11.0-1013-oracle-64kUpgrade linux-image-generic-hwe-22.04Upgrade linux-image-6.8.0-60-genericUpgrade linux-image-6.8.0-1016-azure-nvidiaUpgrade linux-image-6.11.0-1011-lowlatencyUpgrade linux-image-nvidia-64kUpgrade linux-image-6.11.0-1012-azureUpgrade linux-image-oem-22.04cUpgrade linux-image-6.11.0-1013-oracleUpgrade linux-image-genericUpgrade linux-image-6.11.0-1011-gcpUpgrade linux-image-lowlatency-64k-hwe-22.04Upgrade linux-image-virtual-hwe-22.04Upgrade linux-image-oem-24.04aUpgrade linux-image-oracle-64kUpgrade linux-image-6.8.0-1028-nvidiaUpgrade linux-image-ibmUpgrade linux-image-oem-24.04Upgrade linux-image-nvidia-6.8Upgrade linux-image-generic-64kUpgrade linux-image-raspi-realtimeUpgrade linux-image-6.8.1-1022-realtimeUpgrade linux-image-oem-22.04bUpgrade linux-image-6.8.0-1026-oracleUpgrade linux-image-6.11.0-1007-realtimeUpgrade linux-image-ibm-classicUpgrade linux-image-aws-lts-24.04Upgrade linux-image-oracle-64k-lts-24.04Upgrade linux-image-6.8.0-1028-nvidia-64kUpgrade linux-image-azure-fdeUpgrade linux-image-gcpUpgrade linux-image-azure-nvidiaUpgrade linux-image-azure-lts-24.04Upgrade linux-image-6.8.0-60-lowlatencyUpgrade linux-image-azureUpgrade linux-image-generic-hwe-24.04Upgrade linux-image-gcp-64kUpgrade linux-image-lowlatency-64kUpgrade linux-image-realtime-hwe-24.04Upgrade linux-image-lowlatencyUpgrade linux-image-6.11.0-21-generic-64kUpgrade linux-image-gkeopUpgrade linux-image-6.8.0-1029-awsUpgrade linux-image-nvidiaUpgrade linux-image-oem-22.04aUpgrade linux-image-oracle-lts-24.04Upgrade linux-image-6.8.0-1012-gkeopUpgrade linux-image-raspiUpgrade linux-image-oem-22.04Upgrade linux-image-6.8.0-1030-gcpUpgrade linux-image-oem-22.04dUpgrade linux-image-generic-lpaeUpgrade linux-image-6.8.0-1029-azureUpgrade linux-image-gkeUpgrade linux-image-6.8.0-1030-gcp-64kUpgrade linux-image-virtual-hwe-24.04Upgrade linux-image-6.8.0-60-lowlatency-64kUpgrade linux-image-azure-fde-lts-24.04Upgrade linux-image-nvidia-64k-hwe-22.04Upgrade linux-image-oem-24.04bUpgrade linux-image-6.8.0-1028-nvidia-lowlatencyUpgrade linux-image-6.11.0-1017-oemUpgrade linux-image-6.8.0-1028-oemUpgrade linux-image-lowlatency-hwe-24.04Upgrade linux-image-nvidia-lowlatencyUpgrade linux-image-6.8.0-2023-raspi-realtimeUpgrade linux-image-kvmUpgrade linux-image-6.11.0-1011-gcp-64kUpgrade linux-image-gcp-64k-lts-24.04Upgrade linux-image-6.11.0-1012-azure-fdeUpgrade linux-image-6.8.0-1028-nvidia-lowlatency-64kUpgrade linux-image-6.11.0-1011-awsUpgrade linux-image-6.8.0-1029-azure-fdeUpgrade linux-image-awsUpgrade linux-image-realtimeUpgrade linux-image-gkeop-6.8Upgrade linux-image-6.8.0-1025-gkeUpgrade linux-image-6.11.0-21-genericUpgrade linux-image-lowlatency-hwe-22.04Upgrade linux-image-virtualUpgrade linux-image-gcp-lts-24.04Upgrade linux-image-oracleUpgrade linux-image-6.8.0-1026-ibmUpgrade linux-image-ibm-lts-24.04Upgrade linux-image-6.8.0-1026-oracle-64kUpgrade linux-image-6.8.0-1028-raspiUpgrade linux-image-lowlatency-64k-hwe-24.04Upgrade linux-image-6.11.0-1010-raspiUpgrade linux-image-nvidia-lowlatency-64kUpgrade linux-image-nvidia-hwe-22.04Upgrade linux-image-generic-64k-hwe-24.04Upgrade linux-image-nvidia-64k-6.8Upgrade linux-image-generic-64k-hwe-22.04Upgrade linux-image-6.8.0-60-generic-64kUpgrade linux-image-6.11.0-1011-lowlatency-64k | Mar 28, 2025 | Jan 6, 2025 |
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