Description
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.
Metrics
No CVSS score has been published yet.
Affected software
Source: the vendor's advisory (CNA). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= 2e98940f123d9c69d4759078aea9a536244c98d3, < 8aabe0fba01486b5d893e708b05a8fa7f1b7efbb; >= 2e98940f123d9c69d4759078aea9a536244c98d3, < 99d42aef089a07cfb1d404a7227ac9dc7628b497; >= 2e98940f123d9c69d4759078aea9a536244c98d3, < 843e149989665f8309ad2efe6048dc76591e1f94 |
| Linux | Linux | 6.17 |
References
Timeline
- Published
- Sep 17, 2026
- Last modified
- Oct 19, 2026
- NVD status
- Received