Answer in brief
CVE-2026-64151 records a Unknown severity vulnerability in iommupt: Check for missing PAGE_SIZE in the pgsize_bitmap. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=dcd6a011a8d523a114af2360a8753de5bd60c139 <00850f41da24423587abd6124a790dd4f12bcef3 || >=dcd6a011a8d523a114af2360a8753de5bd60c139 <8ef3f77c440005c7f04229a75976bfc078364247 | 00850f41da24423587abd6124a790dd4f12bcef3, 8ef3f77c440005c7f04229a75976bfc078364247 |
| Linux/Linuxgeneric | 6.19 | Not reported |
Published upstream
Jul 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
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.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2026-64151 records a Unknown severity vulnerability in iommupt: Check for missing PAGE_SIZE in the pgsize_bitmap. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=dcd6a011a8d523a114af2360a8753de5bd60c139 <00850f41da24423587abd6124a790dd4f12bcef3 || >=dcd6a011a8d523a114af2360a8753de5bd60c139 <8ef3f77c440005c7f04229a75976bfc078364247 | 00850f41da24423587abd6124a790dd4f12bcef3, 8ef3f77c440005c7f04229a75976bfc078364247 |
| Linux/Linuxgeneric | 6.19 | Not reported |
Published upstream
Jul 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
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.
Quoted source text, attributed separately from HOL analysis.