Answer in brief
CVE-2025-21724 records a Unknown severity vulnerability in iommufd/iova_bitmap: Fix shift-out-of-bounds in iova_bitmap_offset_to_index(). 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-2025-21724 records a Unknown severity vulnerability in iommufd/iova_bitmap: Fix shift-out-of-bounds in iova_bitmap_offset_to_index(). 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 | >=58ccf0190d19d9a8a41f8a02b9e06742b58df4a1 <44d9c94b7a3f29a3e07c4753603a35e9b28842a3 || >=58ccf0190d19d9a8a41f8a02b9e06742b58df4a1 <38ac76fc06bc6826a3e4b12a98efbe98432380a9 || >=58ccf0190d19d9a8a41f8a02b9e06742b58df4a1 <d5d33f01b86af44b23eea61ee309e4ef22c0cdfe || >=58ccf0190d19d9a8a41f8a02b9e06742b58df4a1 <b1f8453b8ff1ab79a03820ef608256c499769cb6 || >=58ccf0190d19d9a8a41f8a02b9e06742b58df4a1 <e24c1551059268b37f6f40639883eafb281b8b9c | 44d9c94b7a3f29a3e07c4753603a35e9b28842a3, 38ac76fc06bc6826a3e4b12a98efbe98432380a9, d5d33f01b86af44b23eea61ee309e4ef22c0cdfe, b1f8453b8ff1ab79a03820ef608256c499769cb6, e24c1551059268b37f6f40639883eafb281b8b9c |
| Linux/Linuxgeneric | 6.1 | 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
Feb 27, 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: iommufd/iova_bitmap: Fix shift-out-of-bounds in iova_bitmap_offset_to_index() Resolve a UBSAN shift-out-of-bounds issue in iova_bitmap_offset_to_index() where shifting the constant "1" (of type int) by bitmap->mapped.pgshift (an unsigned long value) could result in undefined behavior. The constant "1" defaults to a 32-bit "int", and when "pgshift" exceeds 31 (e.g., pgshift = 63) the shift operation overflows, as the result cannot be represented in a 32-bit type. To resolve this, the constant is updated to "1UL", promoting it to an unsigned long type to match the operand's type.
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 | >=58ccf0190d19d9a8a41f8a02b9e06742b58df4a1 <44d9c94b7a3f29a3e07c4753603a35e9b28842a3 || >=58ccf0190d19d9a8a41f8a02b9e06742b58df4a1 <38ac76fc06bc6826a3e4b12a98efbe98432380a9 || >=58ccf0190d19d9a8a41f8a02b9e06742b58df4a1 <d5d33f01b86af44b23eea61ee309e4ef22c0cdfe || >=58ccf0190d19d9a8a41f8a02b9e06742b58df4a1 <b1f8453b8ff1ab79a03820ef608256c499769cb6 || >=58ccf0190d19d9a8a41f8a02b9e06742b58df4a1 <e24c1551059268b37f6f40639883eafb281b8b9c | 44d9c94b7a3f29a3e07c4753603a35e9b28842a3, 38ac76fc06bc6826a3e4b12a98efbe98432380a9, d5d33f01b86af44b23eea61ee309e4ef22c0cdfe, b1f8453b8ff1ab79a03820ef608256c499769cb6, e24c1551059268b37f6f40639883eafb281b8b9c |
| Linux/Linuxgeneric | 6.1 | 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
Feb 27, 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: iommufd/iova_bitmap: Fix shift-out-of-bounds in iova_bitmap_offset_to_index() Resolve a UBSAN shift-out-of-bounds issue in iova_bitmap_offset_to_index() where shifting the constant "1" (of type int) by bitmap->mapped.pgshift (an unsigned long value) could result in undefined behavior. The constant "1" defaults to a 32-bit "int", and when "pgshift" exceeds 31 (e.g., pgshift = 63) the shift operation overflows, as the result cannot be represented in a 32-bit type. To resolve this, the constant is updated to "1UL", promoting it to an unsigned long type to match the operand's type.
Quoted source text, attributed separately from HOL analysis.