CVE-2026-43130 (GCVE-0-2026-43130)

Vulnerability from cvelistv5 – Published: 2026-05-06 11:27 – Updated: 2026-05-23 16:06
VLAI
Title
iommu/vt-d: Flush dev-IOTLB only when PCIe device is accessible in scalable mode
Summary
In the Linux kernel, the following vulnerability has been resolved: iommu/vt-d: Flush dev-IOTLB only when PCIe device is accessible in scalable mode Commit 4fc82cd907ac ("iommu/vt-d: Don't issue ATS Invalidation request when device is disconnected") relies on pci_dev_is_disconnected() to skip ATS invalidation for safely-removed devices, but it does not cover link-down caused by faults, which can still hard-lock the system. For example, if a VM fails to connect to the PCIe device, "virsh destroy" is executed to release resources and isolate the fault, but a hard-lockup occurs while releasing the group fd. Call Trace: qi_submit_sync qi_flush_dev_iotlb intel_pasid_tear_down_entry 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 Although pci_device_is_present() is slower than pci_dev_is_disconnected(), it still takes only ~70 µs on a ConnectX-5 (8 GT/s, x2) and becomes even faster as PCIe speed and width increase. Besides, devtlb_invalidation_with_pasid() is called only in the paths below, which are far less frequent than memory map/unmap. 1. mm-struct release 2. {attach,release}_dev 3. set/remove PASID 4. dirty-tracking setup The gain in system stability far outweighs the negligible cost of using pci_device_is_present() instead of pci_dev_is_disconnected() to decide when to skip ATS invalidation, especially under GDR high-load conditions.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: f873b85ec762c5a6abe94a7ddb31df5d3ba07d85 , < 581ce094d9eafb78ec4f9de77bd24b780c151236 (git)
Affected: d70f1c85113cd8c2aa8373f491ca5d1b22ec0554 , < e2c78c69f8faf2885ea4ceee08c71ac738f401a0 (git)
Affected: 34a7b30f56d30114bf4d436e4dc793afe326fbcf , < ead67d0378e90f419e385a43af29435242d80c12 (git)
Affected: 2b74b2a92e524d7c8dec8e02e95ecf18b667c062 , < 01aed2f1d7cb8fdf4c60c5bb4727608cb82b401d (git)
Affected: 4fc82cd907ac075648789cc3a00877778aa1838b , < 9813306610d0d718c863aaa70928bf57d7570ec0 (git)
Affected: 4fc82cd907ac075648789cc3a00877778aa1838b , < 9deaacc8dcaddb6ddc5b52e1e63b457450ec0f94 (git)
Affected: 4fc82cd907ac075648789cc3a00877778aa1838b , < 0da6697e577023d8867c7beb2d16a22510e4eea9 (git)
Affected: 4fc82cd907ac075648789cc3a00877778aa1838b , < 10e60d87813989e20eac1f3eda30b3bae461e7f9 (git)
Affected: c04f2780919f20e2cc4846764221f5e802555868 (git)
Affected: 025bc6b41e020aeb1e71f84ae3ffce945026de05 (git)
Affected: 5.10.214 , < 5.10.252 (semver)
Affected: 5.15.153 , < 5.15.202 (semver)
Affected: 6.1.83 , < 6.1.165 (semver)
Affected: 6.6.23 , < 6.6.128 (semver)
Affected: 6.7.11 , < 6.8 (semver)
Affected: 6.8.2 , < 6.9 (semver)
Create a notification for this product.
Linux Linux Affected: 6.9
Unaffected: 0 , < 6.9 (semver)
Unaffected: 5.10.252 , ≤ 5.10.* (semver)
Unaffected: 5.15.202 , ≤ 5.15.* (semver)
Unaffected: 6.1.165 , ≤ 6.1.* (semver)
Unaffected: 6.6.128 , ≤ 6.6.* (semver)
Unaffected: 6.12.75 , ≤ 6.12.* (semver)
Unaffected: 6.18.16 , ≤ 6.18.* (semver)
Unaffected: 6.19.6 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Show details on NVD website
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\niommu/vt-d: Flush dev-IOTLB only when PCIe device is accessible in scalable mode\n\nCommit 4fc82cd907ac (\"iommu/vt-d: Don\u0027t issue ATS Invalidation\nrequest when device is disconnected\") relies on\npci_dev_is_disconnected() to skip ATS invalidation for\nsafely-removed devices, but it does not cover link-down caused\nby faults, which can still hard-lock the system.\n\nFor example, if a VM fails to connect to the PCIe device,\n\"virsh destroy\" is executed to release resources and isolate\nthe fault, but a hard-lockup occurs while releasing the group fd.\n\nCall Trace:\n qi_submit_sync\n qi_flush_dev_iotlb\n intel_pasid_tear_down_entry\n device_block_translation\n blocking_domain_attach_dev\n __iommu_attach_device\n __iommu_device_set_domain\n __iommu_group_set_domain_internal\n iommu_detach_group\n vfio_iommu_type1_detach_group\n vfio_group_detach_container\n vfio_group_fops_release\n __fput\n\nAlthough pci_device_is_present() is slower than\npci_dev_is_disconnected(), it still takes only ~70 \u00b5s on a\nConnectX-5 (8 GT/s, x2) and becomes even faster as PCIe speed\nand width increase.\n\nBesides, devtlb_invalidation_with_pasid() is called only in the\npaths below, which are far less frequent than memory map/unmap.\n\n1. mm-struct release\n2. {attach,release}_dev\n3. set/remove PASID\n4. dirty-tracking setup\n\nThe gain in system stability far outweighs the negligible cost\nof using pci_device_is_present() instead of pci_dev_is_disconnected()\nto decide when to skip ATS invalidation, especially under GDR\nhigh-load conditions."
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qi_flush_dev_iotlb\\n intel_pasid_tear_down_entry\\n device_block_translation\\n blocking_domain_attach_dev\\n __iommu_attach_device\\n __iommu_device_set_domain\\n __iommu_group_set_domain_internal\\n iommu_detach_group\\n vfio_iommu_type1_detach_group\\n vfio_group_detach_container\\n vfio_group_fops_release\\n __fput\\n\\nAlthough pci_device_is_present() is slower than\\npci_dev_is_disconnected(), it still takes only ~70 \u00b5s on a\\nConnectX-5 (8 GT/s, x2) and becomes even faster as PCIe speed\\nand width increase.\\n\\nBesides, devtlb_invalidation_with_pasid() is called only in the\\npaths below, which are far less frequent than memory map/unmap.\\n\\n1. mm-struct release\\n2. {attach,release}_dev\\n3. set/remove PASID\\n4. dirty-tracking setup\\n\\nThe gain in system stability far outweighs the negligible cost\\nof using pci_device_is_present() instead of pci_dev_is_disconnected()\\nto decide when to skip ATS invalidation, especially under GDR\\nhigh-load conditions.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"NVD-CWE-noinfo\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.10.214\",\"versionEndExcluding\":\"5.10.252\",\"matchCriteriaId\":\"F301F41A-824C-4760-91D6-829EA98625CE\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.15.153\",\"versionEndExcluding\":\"5.15.202\",\"matchCriteriaId\":\"117A1A1F-F0DE-44E4-B126-9D004FA22B98\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.1.83\",\"versionEndExcluding\":\"6.1.165\",\"matchCriteriaId\":\"ED05E435-2E50-4978-9EB7-7CD836BB7F33\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.6.23\",\"versionEndExcluding\":\"6.6.128\",\"matchCriteriaId\":\"700B618A-E90E-4922-BA41-8FCAD15AC28F\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7.11\",\"versionEndExcluding\":\"6.8\",\"matchCriteriaId\":\"CD8383BB-B294-4F4D-996D-A780685E6362\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.8.2\",\"versionEndExcluding\":\"6.12.75\",\"matchCriteriaId\":\"2596BDC4-B8B0-4DD1-B529-FDCF124D0E31\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.13\",\"versionEndExcluding\":\"6.18.16\",\"matchCriteriaId\":\"B4B8CDA9-BADF-4CF5-8B3B-702DE8EEA40B\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.19\",\"versionEndExcluding\":\"6.19.6\",\"matchCriteriaId\":\"373EEEDA-FAA1-4FB4-B6ED-DB4DD99DBE67\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/01aed2f1d7cb8fdf4c60c5bb4727608cb82b401d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/0da6697e577023d8867c7beb2d16a22510e4eea9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/10e60d87813989e20eac1f3eda30b3bae461e7f9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/581ce094d9eafb78ec4f9de77bd24b780c151236\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/9813306610d0d718c863aaa70928bf57d7570ec0\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/9deaacc8dcaddb6ddc5b52e1e63b457450ec0f94\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/e2c78c69f8faf2885ea4ceee08c71ac738f401a0\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/ead67d0378e90f419e385a43af29435242d80c12\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}"
  }
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.