CVE catalog

CVE-2026-43161

In the Linux kernel, the following vulnerability has been resolved: iommu/vt-d: Skip dev-iotlb flush for inaccessible PCIe device without scalable mode PCIe endpoints with ATS enabled and passed thr

[CVE catalog]

Severity: Medium · CVSS 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Published: May 6, 2026, 12:00:00 AM UTC
Source: [NVD] · [CVE record]
EPSS: 0.12% · Oct 25, 2026

In the Linux kernel, the following vulnerability has been resolved: iommu/vt-d: Skip dev-iotlb flush for inaccessible PCIe device without scalable mode PCIe endpoints with ATS enabled and passed through to userspace (e.g., QEMU, DPDK) can hard-lock the host when their link drops, either by surprise removal or by a link fault. Commit 4fc82cd907ac ("iommu/vt-d: Don't issue ATS Invalidation request when device is disconnected") adds pci_dev_is_disconnected() to devtlb_invalidation_with_pasid() so ATS invalidation is skipped only when the device is being safely removed, but it applies only when Intel IOMMU scalable mode is enabled. With scalable mode disabled or unsupported, a system hard-lock occurs when a PCIe endpoint's link drops because the Intel IOMMU waits indefinitely for an ATS invalidation that cannot complete. Call Trace: qi_submit_sync qi_flush_dev_iotlb __context_flush_dev_iotlb.part.0 domain_context_clear_one_cb pci_for_each_dma_alias device_block_translation blocking_domain_attach_dev iommu_deinit_device __iommu_group_remove_device iommu_release_device iommu_bus_notifier blocking_notifier_call_chain bus_notify device_del pci_remove_bus_device pci_stop_and_remove_bus_device pciehp_unconfigure_device pciehp_disable_slot pciehp_handle_presence_or_link_change pciehp_ist Commit 81e921fd3216 ("iommu/vt-d: Fix NULL domain on device release") adds intel_pasid_teardown_sm_context() to intel_iommu_release_device(), which calls qi_flush_dev_iotlb() and can also hard-lock the system when a PCIe endpoint's link drops. Call Trace: qi_submit_sync qi_flush_dev_iotlb __context_flush_dev_iotlb.part.0 intel_context_flush_no_pasid device_pasid_table_teardown pci_pasid_table_teardown pci_for_each_dma_alias intel_pasid_teardown_sm_context intel_iommu_release_device iommu_deinit_device __iommu_group_remove_device iommu_release_device iommu_bus_notifier blocking_notifier_call_chain bus_notify device_del pci_remove_bus_device pci_stop_and_remove_bus_device pciehp_unconfigure_device pciehp_disable_slot pciehp_handle_presence_or_link_change pciehp_ist Sometimes the endpoint loses connection without a link-down event (e.g., due to a link fault); killing the process (virsh destroy) then hard-locks the host. Call Trace: qi_submit_sync qi_flush_dev_iotlb __context_flush_dev_iotlb.part.0 domain_context_clear_one_cb pci_for_each_dma_alias device_block_translation blocking_domain_attach_dev __iommu_attach_device __iommu_device_set_domain __iommu_group_set_domain_internal iommu_detach_group vfio_iommu_type1_detach_group vfio_group_detach_container vfio_group_fops_release __fput pci_dev_is_disconnected() only covers safe-removal paths; pci_device_is_present() tests accessibility by reading vendor/device IDs and internally calls pci_dev_is_disconnected(). On a ConnectX-5 (8 GT/s, x2) this costs ~70 µs. Since __context_flush_dev_iotlb() is only called on {attach,release}_dev paths (not hot), add pci_device_is_present() there to skip inaccessible devices and avoid the hard-lock.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	linux	sid	`7.2.12-1`	fixed
Debian	linux	forky	`7.2.12-1`	fixed
Debian	linux	trixie	`6.12.107-1`	fixed
Debian	linux	trixie-security	`6.12.113-1`	fixed
Debian	linux	bookworm	`6.1.176-1`	vulnerable
Debian	linux	bookworm-security	`6.1.190-1`	vulnerable
Cpe	linux	Not reported	Not reported	vulnerable
Cpe	linux_kernel	Not reported	`5.13`	fixed
Cpe	linux_kernel	Not reported	`5.14`	fixed
Cpe	linux_kernel	Not reported	`6.12.77`	fixed
Cpe	linux_kernel	Not reported	`6.18.17`	fixed
Cpe	linux_kernel	Not reported	`6.19.6`	fixed
Cpe	linux_kernel	Not reported	Not reported	unknown

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	linux	source	sid	`6.19.6-1`	not yet assigned	Not reported	Not reported
Debian	linux	source	forky	`6.19.6-1`	not yet assigned	Not reported	Not reported
Debian	linux	source	trixie	`6.12.85-1`	not yet assigned	Not reported	Not reported
Debian	linux	source	bookworm	`(unfixed)`	not yet assigned	Not reported	Not reported
Cpe	linux_kernel	cpe	Not reported	`5.13`	Not reported	Not reported	Not reported
Cpe	linux_kernel	cpe	Not reported	`5.14`	Not reported	Not reported	Not reported
Cpe	linux_kernel	cpe	Not reported	`6.12.77`	Not reported	Not reported	Not reported
Cpe	linux_kernel	cpe	Not reported	`6.18.17`	Not reported	Not reported	Not reported
Cpe	linux_kernel	cpe	Not reported	`6.19.6`	Not reported	Not reported	Not reported

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[bpftool]Affected
Source package: [linux]
Details (6)
- 7.1.0+6.1.176-1 · amd64 · bookworm
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
- 7.1.0+6.1.176-1 · arm64 · bookworm
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
- 7.5.0+6.12.95-1~bpo12+1 · amd64 · bookworm-backports
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
- 7.5.0+6.12.95-1~bpo12+1 · arm64 · bookworm-backports
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
- 7.1.0+6.1.180-1 · amd64 · bookworm-security
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
- 7.1.0+6.1.180-1 · arm64 · bookworm-security
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
[hyperv-daemons]Affected
Source package: [linux]
Details (6)
- 6.1.176-1 · amd64 · bookworm
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
- 6.1.176-1 · arm64 · bookworm
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
- 6.12.95-1~bpo12+1 · amd64 · bookworm-backports
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
- 6.12.95-1~bpo12+1 · arm64 · bookworm-backports
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
- 6.1.180-1 · amd64 · bookworm-security
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
- 6.1.180-1 · arm64 · bookworm-security
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
[intel-sdsi]Affected
Source package: [linux]
Details (1)
- 6.12.95-1~bpo12+1 · amd64 · bookworm-backports
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
[libcpupower1]Affected
Source package: [linux]
Details (6)
- 6.1.176-1 · amd64 · bookworm
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
- 6.1.176-1 · arm64 · bookworm
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
- 6.12.95-1~bpo12+1 · amd64 · bookworm-backports
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
- 6.12.95-1~bpo12+1 · arm64 · bookworm-backports
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
- 6.1.180-1 · amd64 · bookworm-security
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
- 6.1.180-1 · arm64 · bookworm-security
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
[libcpupower-dev]Affected
Source package: [linux]
Details (6)
- 6.1.176-1 · amd64 · bookworm
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
- 6.1.176-1 · arm64 · bookworm
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
- 6.12.95-1~bpo12+1 · amd64 · bookworm-backports
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
- 6.12.95-1~bpo12+1 · arm64 · bookworm-backports
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
- 6.1.180-1 · amd64 · bookworm-security
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
- 6.1.180-1 · arm64 · bookworm-security
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
[linux-bpf-dev]Affected
Source package: [linux]
Details (2)
- 6.12.95-1~bpo12+1 · amd64 · bookworm-backports
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
- 6.12.95-1~bpo12+1 · arm64 · bookworm-backports
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
[linux-compiler-gcc-12-x86]Affected
Source package: [linux]
Details (2)
- 6.1.176-1 · amd64 · bookworm
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
- 6.1.180-1 · amd64 · bookworm-security
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
[linux-config-6.1]Affected
Source package: [linux]
Details (4)
- 6.1.176-1 · amd64 · bookworm
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
- 6.1.176-1 · arm64 · bookworm
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
- 6.1.180-1 · amd64 · bookworm-security
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
- 6.1.180-1 · arm64 · bookworm-security
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
[linux-cpupower]Affected
Source package: [linux]
Details (6)
- 6.1.176-1 · amd64 · bookworm
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
- 6.1.176-1 · arm64 · bookworm
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
- 6.12.95-1~bpo12+1 · amd64 · bookworm-backports
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
- 6.12.95-1~bpo12+1 · arm64 · bookworm-backports
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
- 6.1.180-1 · amd64 · bookworm-security
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
- 6.1.180-1 · arm64 · bookworm-security
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
[linux-doc]Affected
Source package: [linux]
Details (32)
- 6.1.170-3 · all · bookworm
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
- 6.1.170-3 · all · bookworm
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
- 6.1.176-1 · all · bookworm
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
- 6.1.176-1 · all · bookworm
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
- 6.12.43-1~bpo12+1 · all · bookworm-backports
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
- 6.12.43-1~bpo12+1 · all · bookworm-backports
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
- 6.12.57-1~bpo12+1 · all · bookworm-backports
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
- 6.12.57-1~bpo12+1 · all · bookworm-backports
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
- 6.12.63-1~bpo12+1 · all · bookworm-backports
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
- 6.12.63-1~bpo12+1 · all · bookworm-backports
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
- 6.12.69-1~bpo12+1 · all · bookworm-backports
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
- 6.12.69-1~bpo12+1 · all · bookworm-backports
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
- 6.12.73-1~bpo12+1 · all · bookworm-backports
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
- 6.12.73-1~bpo12+1 · all · bookworm-backports
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
- 6.12.74-2~bpo12+1 · all · bookworm-backports
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
- 6.12.74-2~bpo12+1 · all · bookworm-backports
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
- 6.12.85-1~bpo12+1 · all · bookworm-backports
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
- 6.12.85-1~bpo12+1 · all · bookworm-backports
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
- 6.12.86-1~bpo12+1 · all · bookworm-backports
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
- 6.12.86-1~bpo12+1 · all · bookworm-backports
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
- 6.12.88-1~bpo12+1 · all · bookworm-backports
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
- 6.12.88-1~bpo12+1 · all · bookworm-backports
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
- 6.12.90-1~bpo12+1 · all · bookworm-backports
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
- 6.12.90-1~bpo12+1 · all · bookworm-backports
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
- 6.12.90-2~bpo12+1 · all · bookworm-backports
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
- 6.12.90-2~bpo12+1 · all · bookworm-backports
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
- 6.12.94-1~bpo12+1 · all · bookworm-backports
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
- 6.12.94-1~bpo12+1 · all · bookworm-backports
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
- 6.12.95-1~bpo12+1 · all · bookworm-backports
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
- 6.12.95-1~bpo12+1 · all · bookworm-backports
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
- 6.1.180-1 · all · bookworm-security
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
- 6.1.180-1 · all · bookworm-security
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
[linux-doc-6.1]Affected
Source package: [linux]
Details (6)
- 6.1.170-3 · all · bookworm
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
- 6.1.170-3 · all · bookworm
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
- 6.1.176-1 · all · bookworm
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
- 6.1.176-1 · all · bookworm
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
- 6.1.180-1 · all · bookworm-security
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
- 6.1.180-1 · all · bookworm-security
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
[linux-headers-6.1.0-47-amd64]Affected
Source package: [linux]
Details (1)
- 6.1.170-3 · amd64 · bookworm
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
[linux-headers-6.1.0-47-arm64]Affected
Source package: [linux]
Details (1)
- 6.1.170-3 · arm64 · bookworm
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
[linux-headers-6.1.0-47-cloud-amd64]Affected
Source package: [linux]
Details (1)
- 6.1.170-3 · amd64 · bookworm
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
[linux-headers-6.1.0-47-cloud-arm64]Affected
Source package: [linux]
Details (1)
- 6.1.170-3 · arm64 · bookworm
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
[linux-headers-6.1.0-47-common]Affected
Source package: [linux]
Details (2)
- 6.1.170-3 · all · bookworm
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
- 6.1.170-3 · all · bookworm
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
[linux-headers-6.1.0-47-common-rt]Affected
Source package: [linux]
Details (2)
- 6.1.170-3 · all · bookworm
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
- 6.1.170-3 · all · bookworm
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
[linux-headers-6.1.0-47-rt-amd64]Affected
Source package: [linux]
Details (1)
- 6.1.170-3 · amd64 · bookworm
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
[linux-headers-6.1.0-47-rt-arm64]Affected
Source package: [linux]
Details (1)
- 6.1.170-3 · arm64 · bookworm
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12
[linux-headers-6.1.0-50-amd64]Affected
Source package: [linux]
Details (1)
- 6.1.176-1 · amd64 · bookworm
  Affected
  nvd · linux · debian · bookworm; nvd · linux · debian · 12

Next results

Observed: Oct 27, 2026, 7:43:27 AM UTC

References

[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]