Answer in brief
CVE-2025-71161 records a Medium severity (CVSS 5.5) vulnerability in dm-verity: disable recursive forward error correction. 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 1518-4 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-2025-71161 records a Medium severity (CVSS 5.5) vulnerability in dm-verity: disable recursive forward error correction. 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 1518-4 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.
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), Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (generic), Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | 4.5 | Not reported |
| Linux/Linuxgeneric | >=a739ff3f543afbb4a041c16cd0182c8e8d366e70 <8b821ca892cfeeaf0bedc9fc72717294f67144d5 || >=a739ff3f543afbb4a041c16cd0182c8e8d366e70 <e227d2b229c7529bd98d348efc55262ccf24ab35 || >=a739ff3f543afbb4a041c16cd0182c8e8d366e70 <897d9006e75f46f8bd7df78faa424327ae6a4bcf || >=a739ff3f543afbb4a041c16cd0182c8e8d366e70 <4220cb37406915c926c0e4a3dbab77cd9cceeb1e || >=a739ff3f543afbb4a041c16cd0182c8e8d366e70 <232948cf600fba69aff36b25d85ef91a73a35756 || >=a739ff3f543afbb4a041c16cd0182c8e8d366e70 <d9f3e47d3fae0c101d9094bc956ed24e7a0ee801 | 8b821ca892cfeeaf0bedc9fc72717294f67144d5, e227d2b229c7529bd98d348efc55262ccf24ab35, 897d9006e75f46f8bd7df78faa424327ae6a4bcf, 4220cb37406915c926c0e4a3dbab77cd9cceeb1e, 232948cf600fba69aff36b25d85ef91a73a35756, d9f3e47d3fae0c101d9094bc956ed24e7a0ee801 |
| Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.6 <* | * |
| Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.5 <* | * |
| Siemens/SIMATIC S7-1500 CPU 1518F-4 PN/DP MFPgeneric | >=V3.1.6 <* | * |
| Siemens/SIMATIC S7-1500 CPU 1518F-4 PN/DP MFPgeneric | >=V3.1.5 <* | * |
| Siemens/SIPLUS S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.6 <* | * |
| Siemens/SIPLUS S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.5 <* | * |
Published upstream
Jan 23, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jul 30, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jul 14, 2026
In the Linux kernel, the following vulnerability has been resolved: dm-verity: disable recursive forward error correction There are two problems with the recursive correction: 1. It may cause denial-of-service. In fec_read_bufs, there is a loop that has 253 iterations. For each iteration, we may call verity_hash_for_block recursively. There is a limit of 4 nested recursions - that means that there may be at most 253^4 (4 billion) iterations. Red Hat QE team actually created an image that pushes dm-verity to this limit - and this image just makes the udev-worker process get stuck in the 'D' state. 2. It doesn't work. In fec_read_bufs we store data into the variable "fio->bufs", but fio bufs is shared between recursive invocations, if "verity_hash_for_block" invoked correction recursively, it would overwrite partially filled fio->bufs.
Quoted source text, attributed separately from HOL analysis.
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), Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (generic), Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | 4.5 | Not reported |
| Linux/Linuxgeneric | >=a739ff3f543afbb4a041c16cd0182c8e8d366e70 <8b821ca892cfeeaf0bedc9fc72717294f67144d5 || >=a739ff3f543afbb4a041c16cd0182c8e8d366e70 <e227d2b229c7529bd98d348efc55262ccf24ab35 || >=a739ff3f543afbb4a041c16cd0182c8e8d366e70 <897d9006e75f46f8bd7df78faa424327ae6a4bcf || >=a739ff3f543afbb4a041c16cd0182c8e8d366e70 <4220cb37406915c926c0e4a3dbab77cd9cceeb1e || >=a739ff3f543afbb4a041c16cd0182c8e8d366e70 <232948cf600fba69aff36b25d85ef91a73a35756 || >=a739ff3f543afbb4a041c16cd0182c8e8d366e70 <d9f3e47d3fae0c101d9094bc956ed24e7a0ee801 | 8b821ca892cfeeaf0bedc9fc72717294f67144d5, e227d2b229c7529bd98d348efc55262ccf24ab35, 897d9006e75f46f8bd7df78faa424327ae6a4bcf, 4220cb37406915c926c0e4a3dbab77cd9cceeb1e, 232948cf600fba69aff36b25d85ef91a73a35756, d9f3e47d3fae0c101d9094bc956ed24e7a0ee801 |
| Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.6 <* | * |
| Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.5 <* | * |
| Siemens/SIMATIC S7-1500 CPU 1518F-4 PN/DP MFPgeneric | >=V3.1.6 <* | * |
| Siemens/SIMATIC S7-1500 CPU 1518F-4 PN/DP MFPgeneric | >=V3.1.5 <* | * |
| Siemens/SIPLUS S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.6 <* | * |
| Siemens/SIPLUS S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.5 <* | * |
Published upstream
Jan 23, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jul 30, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jul 14, 2026
In the Linux kernel, the following vulnerability has been resolved: dm-verity: disable recursive forward error correction There are two problems with the recursive correction: 1. It may cause denial-of-service. In fec_read_bufs, there is a loop that has 253 iterations. For each iteration, we may call verity_hash_for_block recursively. There is a limit of 4 nested recursions - that means that there may be at most 253^4 (4 billion) iterations. Red Hat QE team actually created an image that pushes dm-verity to this limit - and this image just makes the udev-worker process get stuck in the 'D' state. 2. It doesn't work. In fec_read_bufs we store data into the variable "fio->bufs", but fio bufs is shared between recursive invocations, if "verity_hash_for_block" invoked correction recursively, it would overwrite partially filled fio->bufs.
Quoted source text, attributed separately from HOL analysis.