Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: iommupt: Check for missing PAGE_SIZE in the pgsize_bitmap Sashiko pointed out that the driver could drop PAGE_SIZE from the pgsize_bitmap. That is technically allowed but nothing does it, and such an iommu_domain would not be used with the DMA API today. Still, it is against the design and it is trivial to fix up. Lift the PT_WARN_ON to the if branch and just skip the fast path.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 6.19, < 7.0.11 |
References
- https://git.kernel.org/stable/c/00850f41da24423587abd6124a790dd4f12bcef3Patch
- https://git.kernel.org/stable/c/8ef3f77c440005c7f04229a75976bfc078364247Patch
FAQ
What is CVE-2026-64151?
CVE-2026-64151 is a vulnerability with a CVSS score of 8.4 (HIGH). In the Linux kernel, the following vulnerability has been resolved: iommupt: Check for missing PAGE_SIZE in the pgsize_bitmap Sashiko pointed out that the driver could drop PAGE_SIZE from the pgsize...
How severe is CVE-2026-64151?
CVE-2026-64151 has been rated HIGH with a CVSS base score of 8.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-64151?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.