Answer in brief
CVE-2026-74600 records a Unknown severity vulnerability in mm/page_table_check: skip special zero mappings. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), 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), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=df4e817b710809425d899340dbfa8504a3ca4ba5 <b726eb3c94d23e09da0e0f46b0fa09fb2b5d99cc || >=df4e817b710809425d899340dbfa8504a3ca4ba5 <8db4bab826ccc9ec10fa41736a48031cd338d392 | b726eb3c94d23e09da0e0f46b0fa09fb2b5d99cc, 8db4bab826ccc9ec10fa41736a48031cd338d392 |
| Linux/Linuxgeneric | >=df4e817b710809425d899340dbfa8504a3ca4ba5 <7755be923e325dc300f4b0c3e1ad7e91b28b3cb9 || >=df4e817b710809425d899340dbfa8504a3ca4ba5 <b726eb3c94d23e09da0e0f46b0fa09fb2b5d99cc || >=df4e817b710809425d899340dbfa8504a3ca4ba5 <8db4bab826ccc9ec10fa41736a48031cd338d392 | 7755be923e325dc300f4b0c3e1ad7e91b28b3cb9, b726eb3c94d23e09da0e0f46b0fa09fb2b5d99cc, 8db4bab826ccc9ec10fa41736a48031cd338d392 |
| Linux/Linuxgeneric | 5.17 | Not reported |
Published upstream
Aug 22, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 23, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 22, 2026
In the Linux kernel, the following vulnerability has been resolved: mm/page_table_check: skip special zero mappings page_table_check_set() and page_table_check_clear() account mappings based on PageAnon(). Shared zero-page PTEs and huge zero PMDs are special mappings, but page_table_check can still account them as file-backed pages. An unprivileged process can populate enough zero mappings to overflow file_map_count and hit the existing BUG_ON(). The PTE path can do this with the shared zero page, and the PMD path can do the same with huge zero mappings. Skip special zero mappings in the user page-table accounting paths. Keep the PTE-side pte_special() check, and identify huge zero PMDs from the mapped folio instead of pmd_special(). That covers architectures where pmd_special() is a no-op without adding huge_zero_pfn checks to the generic counter helpers.
Quoted source text, attributed separately from HOL analysis.