CVE-2026-64151
8.4
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | dcd6a011a8d523a114af2360a8753de5bd60c139 < 00850f41da24423587abd6124a790dd4f12bcef3 | affected |
| Linux | Linux | dcd6a011a8d523a114af2360a8753de5bd60c139 < 8ef3f77c440005c7f04229a75976bfc078364247 | affected |
| Linux | Linux | 6.19 | affected |
| Linux | Linux | 0 < 6.19 | unaffected |
| Linux | Linux | 7.0.11 <= 7.0.* | unaffected |
| Linux | Linux | 7.1 <= * | unaffected |
Weaknesses
References
- https://git.kernel.org/stable/c/00850f41da24423587abd6124a790dd4f12bcef3
- https://git.kernel.org/stable/c/8ef3f77c440005c7f04229a75976bfc078364247
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