Answer in brief
CVE-2025-38071 records a Unknown severity vulnerability in x86/mm: Check return value from memblock_phys_alloc_range(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (generic), Siemens/SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
Answer in brief
CVE-2025-38071 records a Unknown severity vulnerability in x86/mm: Check return value from memblock_phys_alloc_range(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (generic), Siemens/SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (generic) and additional mapped packages. 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), Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (generic), Siemens/SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=a7259df7670240ee03b0cfce8a3e5d3773911e24 <8c18c904d301ffeb33b071eadc55cd6131e1e9be || >=a7259df7670240ee03b0cfce8a3e5d3773911e24 <bffd5f2815c5234d609725cd0dc2f4bc5de2fc67 || >=a7259df7670240ee03b0cfce8a3e5d3773911e24 <c6f2694c580c27dca0cf7546ee9b4bfa6b940e38 || >=a7259df7670240ee03b0cfce8a3e5d3773911e24 <dde4800d2b0f68b945fd81d4fc2d4a10ae25f743 || >=a7259df7670240ee03b0cfce8a3e5d3773911e24 <631ca8909fd5c62b9fda9edda93924311a78a9c4 | 8c18c904d301ffeb33b071eadc55cd6131e1e9be, bffd5f2815c5234d609725cd0dc2f4bc5de2fc67, c6f2694c580c27dca0cf7546ee9b4bfa6b940e38, dde4800d2b0f68b945fd81d4fc2d4a10ae25f743, 631ca8909fd5c62b9fda9edda93924311a78a9c4 |
| Linux/Linuxgeneric | 5.15 | Not reported |
| Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.5 <* | * |
| Siemens/SIMATIC S7-1500 CPU 1518F-4 PN/DP MFPgeneric | >=V3.1.5 <* | * |
| Siemens/SIPLUS S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.5 <* | * |
Published upstream
Jun 18, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jul 14, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 6, 2026
In the Linux kernel, the following vulnerability has been resolved: x86/mm: Check return value from memblock_phys_alloc_range() At least with CONFIG_PHYSICAL_START=0x100000, if there is < 4 MiB of contiguous free memory available at this point, the kernel will crash and burn because memblock_phys_alloc_range() returns 0 on failure, which leads memblock_phys_free() to throw the first 4 MiB of physical memory to the wolves. At a minimum it should fail gracefully with a meaningful diagnostic, but in fact everything seems to work fine without the weird reserve allocation.
Quoted source text, attributed separately from HOL analysis.
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), Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (generic), Siemens/SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=a7259df7670240ee03b0cfce8a3e5d3773911e24 <8c18c904d301ffeb33b071eadc55cd6131e1e9be || >=a7259df7670240ee03b0cfce8a3e5d3773911e24 <bffd5f2815c5234d609725cd0dc2f4bc5de2fc67 || >=a7259df7670240ee03b0cfce8a3e5d3773911e24 <c6f2694c580c27dca0cf7546ee9b4bfa6b940e38 || >=a7259df7670240ee03b0cfce8a3e5d3773911e24 <dde4800d2b0f68b945fd81d4fc2d4a10ae25f743 || >=a7259df7670240ee03b0cfce8a3e5d3773911e24 <631ca8909fd5c62b9fda9edda93924311a78a9c4 | 8c18c904d301ffeb33b071eadc55cd6131e1e9be, bffd5f2815c5234d609725cd0dc2f4bc5de2fc67, c6f2694c580c27dca0cf7546ee9b4bfa6b940e38, dde4800d2b0f68b945fd81d4fc2d4a10ae25f743, 631ca8909fd5c62b9fda9edda93924311a78a9c4 |
| Linux/Linuxgeneric | 5.15 | Not reported |
| Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.5 <* | * |
| Siemens/SIMATIC S7-1500 CPU 1518F-4 PN/DP MFPgeneric | >=V3.1.5 <* | * |
| Siemens/SIPLUS S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.5 <* | * |
Published upstream
Jun 18, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jul 14, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 6, 2026
In the Linux kernel, the following vulnerability has been resolved: x86/mm: Check return value from memblock_phys_alloc_range() At least with CONFIG_PHYSICAL_START=0x100000, if there is < 4 MiB of contiguous free memory available at this point, the kernel will crash and burn because memblock_phys_alloc_range() returns 0 on failure, which leads memblock_phys_free() to throw the first 4 MiB of physical memory to the wolves. At a minimum it should fail gracefully with a meaningful diagnostic, but in fact everything seems to work fine without the weird reserve allocation.
Quoted source text, attributed separately from HOL analysis.