Answer in brief
CVE-2026-64290 records a Medium severity (CVSS 5.5) vulnerability in iommufd: Break the loop on failure in iommufd_fault_fops_read(). 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.
CVSS is 5.5. 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.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=07838f7fd529c8a6de44b601d4b7057e6c8d36ed <a38e0714affc5c0bbb40cba5a65d6d32a5e72a71 || >=07838f7fd529c8a6de44b601d4b7057e6c8d36ed <5539da127d03c1f6c2e2a49fdfbe331a0ccbdea8 || >=07838f7fd529c8a6de44b601d4b7057e6c8d36ed <f66c16b175509642ee7082df57c9bf3deaebae1a || >=07838f7fd529c8a6de44b601d4b7057e6c8d36ed <172fc8b19825a0f5884c38f2289188284e2d45ee | a38e0714affc5c0bbb40cba5a65d6d32a5e72a71, 5539da127d03c1f6c2e2a49fdfbe331a0ccbdea8, f66c16b175509642ee7082df57c9bf3deaebae1a, 172fc8b19825a0f5884c38f2289188284e2d45ee |
| Linux/Linuxgeneric | 6.11 | Not reported |
Published upstream
Jul 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 17, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 3, 2026
In the Linux kernel, the following vulnerability has been resolved: iommufd: Break the loop on failure in iommufd_fault_fops_read() On a copy_to_user() failure inside the inner list_for_each_entry, only the inner loop breaks; the outer while re-fetches the just-restored fault group and retries the failing copy_to_user() forever, spinning the reader at 100% CPU with fault->mutex held. Check rc after the inner loop and break the outer while as well.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2026-64290 records a Medium severity (CVSS 5.5) vulnerability in iommufd: Break the loop on failure in iommufd_fault_fops_read(). 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.
CVSS is 5.5. 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.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=07838f7fd529c8a6de44b601d4b7057e6c8d36ed <a38e0714affc5c0bbb40cba5a65d6d32a5e72a71 || >=07838f7fd529c8a6de44b601d4b7057e6c8d36ed <5539da127d03c1f6c2e2a49fdfbe331a0ccbdea8 || >=07838f7fd529c8a6de44b601d4b7057e6c8d36ed <f66c16b175509642ee7082df57c9bf3deaebae1a || >=07838f7fd529c8a6de44b601d4b7057e6c8d36ed <172fc8b19825a0f5884c38f2289188284e2d45ee | a38e0714affc5c0bbb40cba5a65d6d32a5e72a71, 5539da127d03c1f6c2e2a49fdfbe331a0ccbdea8, f66c16b175509642ee7082df57c9bf3deaebae1a, 172fc8b19825a0f5884c38f2289188284e2d45ee |
| Linux/Linuxgeneric | 6.11 | Not reported |
Published upstream
Jul 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 17, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 3, 2026
In the Linux kernel, the following vulnerability has been resolved: iommufd: Break the loop on failure in iommufd_fault_fops_read() On a copy_to_user() failure inside the inner list_for_each_entry, only the inner loop breaks; the outer while re-fetches the just-restored fault group and retries the failing copy_to_user() forever, spinning the reader at 100% CPU with fault->mutex held. Check rc after the inner loop and break the outer while as well.
Quoted source text, attributed separately from HOL analysis.