{"id":"CVE-2026-43130","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:\n\niommu/vt-d: Flush dev-IOTLB only when PCIe device is accessible in scalable mode\n\nCommit 4fc82cd907ac (\"iommu/vt-d: Don't issue ATS Invalidation\nrequest when device is …","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= f873b85ec762c5a6abe94a7ddb31df5d3ba07d85 < 581ce094d9eafb78ec4f9de77bd24b780c151236","Linux >= d70f1c85113cd8c2aa8373f491ca5d1b22ec0554 < e2c78c69f8faf2885ea4ceee08c71ac738f401a0","Linux >= 34a7b30f56d30114bf4d436e4dc793afe326fbcf < ead67d0378e90f419e385a43af29435242d80c12","Linux >= 2b74b2a92e524d7c8dec8e02e95ecf18b667c062 < 01aed2f1d7cb8fdf4c60c5bb4727608cb82b401d","Linux >= 4fc82cd907ac075648789cc3a00877778aa1838b < 9813306610d0d718c863aaa70928bf57d7570ec0","Linux >= 4fc82cd907ac075648789cc3a00877778aa1838b < 9deaacc8dcaddb6ddc5b52e1e63b457450ec0f94","Linux >= 4fc82cd907ac075648789cc3a00877778aa1838b < 0da6697e577023d8867c7beb2d16a22510e4eea9","Linux >= 4fc82cd907ac075648789cc3a00877778aa1838b < 10e60d87813989e20eac1f3eda30b3bae461e7f9","Linux c04f2780919f20e2cc4846764221f5e802555868","Linux 025bc6b41e020aeb1e71f84ae3ffce945026de05","Linux >= 5.10.214 < 5.10.252","Linux >= 5.15.153 < 5.15.202","Linux >= 6.1.83 < 6.1.165","Linux >= 6.6.23 < 6.6.128","Linux >= 6.7.11 < 6.8","Linux >= 6.8.2 < 6.9","Linux 6.9"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-06T15:29:00.364045Z"},"published":"2026-05-06","updated":"2026-11-06","sourceUpdated":"2026-11-06T15:32:32.416Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-43130","references":[{"url":"https://git.kernel.org/stable/c/581ce094d9eafb78ec4f9de77bd24b780c151236"},{"url":"https://git.kernel.org/stable/c/e2c78c69f8faf2885ea4ceee08c71ac738f401a0"},{"url":"https://git.kernel.org/stable/c/ead67d0378e90f419e385a43af29435242d80c12"},{"url":"https://git.kernel.org/stable/c/01aed2f1d7cb8fdf4c60c5bb4727608cb82b401d"},{"url":"https://git.kernel.org/stable/c/9813306610d0d718c863aaa70928bf57d7570ec0"},{"url":"https://git.kernel.org/stable/c/9deaacc8dcaddb6ddc5b52e1e63b457450ec0f94"},{"url":"https://git.kernel.org/stable/c/0da6697e577023d8867c7beb2d16a22510e4eea9"},{"url":"https://git.kernel.org/stable/c/10e60d87813989e20eac1f3eda30b3bae461e7f9"}],"tags":["cve.org"],"epss":0.00123,"epssPercentile":0.02025,"ingestedAt":"2026-11-06T15:54:04.018Z","slug":"CVE-2026-43130","body":"## Overview\n\nIn 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't 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 µs 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.\n\n## Affected\n\n- `Linux >= f873b85ec762c5a6abe94a7ddb31df5d3ba07d85 < 581ce094d9eafb78ec4f9de77bd24b780c151236`\n- `Linux >= d70f1c85113cd8c2aa8373f491ca5d1b22ec0554 < e2c78c69f8faf2885ea4ceee08c71ac738f401a0`\n- `Linux >= 34a7b30f56d30114bf4d436e4dc793afe326fbcf < ead67d0378e90f419e385a43af29435242d80c12`\n- `Linux >= 2b74b2a92e524d7c8dec8e02e95ecf18b667c062 < 01aed2f1d7cb8fdf4c60c5bb4727608cb82b401d`\n- `Linux >= 4fc82cd907ac075648789cc3a00877778aa1838b < 9813306610d0d718c863aaa70928bf57d7570ec0`\n- `Linux >= 4fc82cd907ac075648789cc3a00877778aa1838b < 9deaacc8dcaddb6ddc5b52e1e63b457450ec0f94`\n- `Linux >= 4fc82cd907ac075648789cc3a00877778aa1838b < 0da6697e577023d8867c7beb2d16a22510e4eea9`\n- `Linux >= 4fc82cd907ac075648789cc3a00877778aa1838b < 10e60d87813989e20eac1f3eda30b3bae461e7f9`\n- `Linux c04f2780919f20e2cc4846764221f5e802555868`\n- `Linux 025bc6b41e020aeb1e71f84ae3ffce945026de05`\n- `Linux >= 5.10.214 < 5.10.252`\n- `Linux >= 5.15.153 < 5.15.202`\n- `Linux >= 6.1.83 < 6.1.165`\n- `Linux >= 6.6.23 < 6.6.128`\n- `Linux >= 6.7.11 < 6.8`\n- `Linux >= 6.8.2 < 6.9`\n- `Linux 6.9`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}