Answer in brief
CVE-2026-74524 records a Unknown severity vulnerability in riscv: mm: Fix out-of-bounds page-table walk during memory hot-remove. 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 | >=c75a74f4ba19c904c0ae1e011ae2568449409ae4 <1da6d832eda02d908df11a30ba6a856b98a3dd76 || >=c75a74f4ba19c904c0ae1e011ae2568449409ae4 <54e07a158f7aea2754849d3a5a4cba1ac338ae7e || >=c75a74f4ba19c904c0ae1e011ae2568449409ae4 <1bb0ef8069ef158d245bac91ac178bb4f1a7ccd2 || >=c75a74f4ba19c904c0ae1e011ae2568449409ae4 <a0188cc133696627857d16054e43f9ebc7efc821 | 1da6d832eda02d908df11a30ba6a856b98a3dd76, 54e07a158f7aea2754849d3a5a4cba1ac338ae7e, 1bb0ef8069ef158d245bac91ac178bb4f1a7ccd2, a0188cc133696627857d16054e43f9ebc7efc821 |
| Linux/Linuxgeneric | 6.11 | Not reported |
Published upstream
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 15, 2026
In the Linux kernel, the following vulnerability has been resolved: riscv: mm: Fix out-of-bounds page-table walk during memory hot-remove remove_pud_mapping() and remove_p4d_mapping() obtain a child table base with pud_offset(p4dp, 0) and p4d_offset(pgd, 0), then add the index for addr. RISC-V folds page-table levels at runtime. When a level is folded, its offset helper returns the parent entry itself, but the index can still be nonzero. Adding it walks past the parent table. Sv48 folds P4D, while Sv39 folds both P4D and PUD, so memory hot-remove can descend into unrelated memory and pass an invalid page to __free_pages(). This can trigger: kernel BUG at include/linux/mm.h:1810! VM_BUG_ON_PAGE(page_ref_count(page) == 0) arch_remove_memory+0x1e/0x5c try_remove_memory+0x15e/0x200 remove_memory+0x24/0x3c Only add the index when the corresponding page-table level is enabled, matching p4d_offset() and pud_offset().
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2026-74524 records a Unknown severity vulnerability in riscv: mm: Fix out-of-bounds page-table walk during memory hot-remove. 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 | >=c75a74f4ba19c904c0ae1e011ae2568449409ae4 <1da6d832eda02d908df11a30ba6a856b98a3dd76 || >=c75a74f4ba19c904c0ae1e011ae2568449409ae4 <54e07a158f7aea2754849d3a5a4cba1ac338ae7e || >=c75a74f4ba19c904c0ae1e011ae2568449409ae4 <1bb0ef8069ef158d245bac91ac178bb4f1a7ccd2 || >=c75a74f4ba19c904c0ae1e011ae2568449409ae4 <a0188cc133696627857d16054e43f9ebc7efc821 | 1da6d832eda02d908df11a30ba6a856b98a3dd76, 54e07a158f7aea2754849d3a5a4cba1ac338ae7e, 1bb0ef8069ef158d245bac91ac178bb4f1a7ccd2, a0188cc133696627857d16054e43f9ebc7efc821 |
| Linux/Linuxgeneric | 6.11 | Not reported |
Published upstream
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 15, 2026
In the Linux kernel, the following vulnerability has been resolved: riscv: mm: Fix out-of-bounds page-table walk during memory hot-remove remove_pud_mapping() and remove_p4d_mapping() obtain a child table base with pud_offset(p4dp, 0) and p4d_offset(pgd, 0), then add the index for addr. RISC-V folds page-table levels at runtime. When a level is folded, its offset helper returns the parent entry itself, but the index can still be nonzero. Adding it walks past the parent table. Sv48 folds P4D, while Sv39 folds both P4D and PUD, so memory hot-remove can descend into unrelated memory and pass an invalid page to __free_pages(). This can trigger: kernel BUG at include/linux/mm.h:1810! VM_BUG_ON_PAGE(page_ref_count(page) == 0) arch_remove_memory+0x1e/0x5c try_remove_memory+0x15e/0x200 remove_memory+0x24/0x3c Only add the index when the corresponding page-table level is enabled, matching p4d_offset() and pud_offset().
Quoted source text, attributed separately from HOL analysis.