{"id":"CVE-2026-43130","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-43130","generatedAt":"2026-10-27T23:10:07.256Z","title":"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\")…","description":"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 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.","published":"2026-05-06T12:16:30.000Z","lastModified":"2026-06-17T10:48:59.000Z","status":"Analyzed","sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","cvss":{"version":"3.1","score":5.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"},"cwe":[],"affected":["linux/linux kernel"],"epss":{"score":0.00123,"percentile":0.02005,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.12%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://git.kernel.org/stable/c/01aed2f1d7cb8fdf4c60c5bb4727608cb82b401d","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/0da6697e577023d8867c7beb2d16a22510e4eea9","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/10e60d87813989e20eac1f3eda30b3bae461e7f9","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/581ce094d9eafb78ec4f9de77bd24b780c151236","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/9813306610d0d718c863aaa70928bf57d7570ec0","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/9deaacc8dcaddb6ddc5b52e1e63b457450ec0f94","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/e2c78c69f8faf2885ea4ceee08c71ac738f401a0","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/ead67d0378e90f419e385a43af29435242d80c12","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-43130","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}