UNKNOWN NVD
CVE-2026-92505
In the Linux kernel, the following vulnerability has been resolved: iommu/amd: Fix undefined behavior in devid_write debugfs function When for_each_pci_segmen
In the Linux kernel, the following vulnerability has been resolved:
iommu/amd: Fix undefined behavior in devid_write debugfs function
When for_each_pci_segment() loop completes without finding a matching
segment, the pci_seg pointer is not NULL but points to an invalid memory
location (the list head). Accessing pci_seg->id after the loop causes
undefined behavior.
Fix this by handling the successful case inside the loop and returning
-EINVAL after the loop if no matching segment is found.
References
- https://git.kernel.org/stable/c/843e149989665f8309ad2efe6048dc76591e1f94
- https://git.kernel.org/stable/c/8aabe0fba01486b5d893e708b05a8fa7f1b7efbb
- https://git.kernel.org/stable/c/99d42aef089a07cfb1d404a7227ac9dc7628b497
This unknown severity vulnerability was published on 2026-09-17 via NVD.
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