In the Linux kernel, the following vulnerability has been resolved:
NTB: epf: Avoid calling pci_irq_vector() from hardirq context
ntb_epf_vec_isr() calls pci_irq_vector() in hardirq context to derive the vector number. pci_irq_vector() calls msi_get_virq() that takes a mutex and can therefore trigger "scheduling while atomic" splats:
BUG: scheduling while atomic: kworker/u33:0/55/0x00010001 ... Call trace: ... schedule+0x38/0x110 schedule_preempt_disabled+0x28/0x50 __mutex_lock.constprop.0+0x848/0x908 __mutex_lock_slowpath+0x18/0x30 mutex_lock+0x4c/0x60 msi_domain_get_virq+0xe8/0x138 pci_irq_vector+0x2c/0x60 ntb_epf_vec_isr+0x28/0x120 [ntb_hw_epf] __handle_irq_event_percpu+0x70/0x3a8 handle_irq_event+0x48/0x100 handle_edge_irq+0x100/0x1c8 ...
Cache the Linux IRQ number for vector 0 when vectors are allocated and use it as a base in the ISR. Running the ISR in a threaded IRQ handler would also avoid the problem, but that would be unnecessary here.
CVSS Details
- CVSS 3.1 Base Score: 7.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linux-6.12Upgrade linux-6.1Upgrade linux | Jul 28, 2026 | Jul 28, 2026 |
| Ubuntu | — | Upgrade linux-image-gke-64kUpgrade linux-image-nvidia-bos-7.0Upgrade linux-image-gcp-64kUpgrade linux-image-7.0.0-1012-aws-64kUpgrade linux-image-nvidia-64kUpgrade linux-image-nvidia-bos-64kUpgrade linux-image-nvidia-64k-7.0Upgrade linux-image-raspiUpgrade linux-image-7.0.0-1011-gcpUpgrade linux-image-oem-26.04Upgrade linux-image-7.0.0-1006-gkeUpgrade linux-image-nvidia-bos-64k-7.0Upgrade linux-image-realtime-64k-hwe-26.04Upgrade linux-image-7.0.0-31-realtime-64kUpgrade linux-image-nvidia-hwe-26.04Upgrade linux-image-oem-26.04bUpgrade linux-image-genericUpgrade linux-image-nvidia-bosUpgrade linux-image-7.0.0-1018-nvidiaUpgrade linux-image-nvidia-7.0Upgrade linux-image-7.0.0-1013-ibmUpgrade linux-image-7.0.0-31-genericUpgrade linux-image-7.0.0-2018-nvidia-bosUpgrade linux-image-ibmUpgrade linux-image-virtual-hwe-26.04Upgrade linux-image-7.0.0-2018-nvidia-bos-64kUpgrade linux-image-generic-64kUpgrade linux-image-7.0.0-1012-awsUpgrade linux-image-oem-7.0Upgrade linux-image-nvidiaUpgrade linux-image-ibm-7.0Upgrade linux-image-7.0.0-1011-gcp-64kUpgrade linux-image-gke-64k-7.0Upgrade linux-image-nvidia-64k-hwe-26.04Upgrade linux-image-realtime-hwe-26.04Upgrade linux-image-oem-26.04aUpgrade linux-image-realtimeUpgrade linux-image-raspi-realtime-7.0Upgrade linux-image-7.0.0-1013-oemUpgrade linux-image-7.0.0-1019-raspiUpgrade linux-image-gke-hwe-26.04Upgrade linux-image-awsUpgrade linux-image-virtual-hwe-24.04Upgrade linux-image-gke-64k-hwe-26.04Upgrade linux-image-gkeUpgrade linux-image-aws-7.0Upgrade linux-image-aws-64kUpgrade linux-image-generic-64k-7.0Upgrade linux-image-generic-7.0Upgrade linux-image-virtualUpgrade linux-image-generic-hwe-24.04Upgrade linux-image-generic-64k-hwe-26.04Upgrade linux-image-gcpUpgrade linux-image-generic-hwe-26.04Upgrade linux-image-raspi-7.0Upgrade linux-image-gke-7.0Upgrade linux-image-7.0.0-31-realtimeUpgrade linux-image-7.0.0-31-generic-64kUpgrade linux-image-virtual-7.0Upgrade linux-image-realtime-7.0Upgrade linux-image-realtime-64kUpgrade linux-image-generic-64k-hwe-24.04Upgrade linux-image-7.0.0-1018-nvidia-64kUpgrade linux-image-realtime-64k-7.0Upgrade linux-image-7.0.0-1019-raspi-realtimeUpgrade linux-image-aws-64k-7.0Upgrade linux-image-raspi-realtimeUpgrade linux-image-gcp-7.0Upgrade linux-image-gcp-64k-7.0Upgrade linux-image-7.0.0-1006-gke-64k | Sep 14, 2026 | Sep 7, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jul 31, 2026 | Jul 25, 2026 |
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