CVE-2026-89453iommu/amd: Put PCI device after handling PPR faults
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No exploitation reported and no EPSS estimate yet.
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In the Linux kernel, the following vulnerability has been resolved: iommu/amd: Put PCI device after handling PPR faults iommu_call_iopf_notifier() looks up the requester with pci_get_domain_bus_and_slot(), which returns a PCI device with its reference count incremented. Neither the successful iommu_report_device_fault() path nor the abort path drops that reference, so every handled PPR request leaks a PCI device reference. This is the same ownership rule that was fixed for the old iommu_v2 ppr_notifier() path by commit 6cf0981c2233 ("iommu/amd: Fix pci device refcount leak in ppr_notifier()"), but iommu_call_iopf_notifier() was added later as a separate PPR/IOPF notifier path. Drop the PCI device reference after handling the PPR entry.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 19, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | 978d626b8f1a239acc635323d731c77eae54eb61 builds before 1de4443f85e4405af00153cdf8ba73ff12a65036; from 978d626b8f1a239acc635323d731c77eae54eb61 before cfc5c1b2caa176dfd40b873a6ff07b11da34cc3e; from 978d626b8f1a239acc635323d731c77eae54eb61 before d1470e16c1977e6c94fadf6048deafaa4d150fec; from 978d626b8f1a239acc635323d731c77eae54eb61 before af3b69b16383fbc8fe5f61b5b0150d2e41ede71f | CNA record |
References
- https://git.kernel.org/stable/c/1de4443f85e4405af00153cdf8ba73ff12a65036
- https://git.kernel.org/stable/c/cfc5c1b2caa176dfd40b873a6ff07b11da34cc3e
- https://git.kernel.org/stable/c/d1470e16c1977e6c94fadf6048deafaa4d150fec
- https://git.kernel.org/stable/c/af3b69b16383fbc8fe5f61b5b0150d2e41ede71f
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.