Answer in brief
CVE-2025-39826 records a High severity (CVSS 7.0) vulnerability in net: rose: convert 'use' field to refcount_t. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC CN 4100 (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-2025-39826 records a High severity (CVSS 7.0) vulnerability in net: rose: convert 'use' field to refcount_t. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC CN 4100 (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 7.0. 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 CN 4100 (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 | >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <fb07156cc0742ba4e93dfcc84280c011d05b301f || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <f8c29fc437d03a98fb075c31c5be761cc8326284 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <0085b250fcc79f900c82a69980ec2f3e1871823b || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <203e4f42596ede31498744018716a3db6dbb7f51 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d860d1faa6b2ce3becfdb8b0c2b048ad31800061 | fb07156cc0742ba4e93dfcc84280c011d05b301f, f8c29fc437d03a98fb075c31c5be761cc8326284, 0085b250fcc79f900c82a69980ec2f3e1871823b, 203e4f42596ede31498744018716a3db6dbb7f51, d860d1faa6b2ce3becfdb8b0c2b048ad31800061 |
| Linux/Linuxgeneric | 2.6.12 | Not reported |
| Siemens/SIMATIC CN 4100generic | >=0 <V5.0 | V5.0 |
| Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.6 <* | * |
| Siemens/SIMATIC S7-1500 CPU 1518F-4 PN/DP MFPgeneric | >=V3.1.6 <* | * |
| Siemens/SIPLUS S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.6 <* | * |
Published upstream
Sep 16, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 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: net: rose: convert 'use' field to refcount_t The 'use' field in struct rose_neigh is used as a reference counter but lacks atomicity. This can lead to race conditions where a rose_neigh structure is freed while still being referenced by other code paths. For example, when rose_neigh->use becomes zero during an ioctl operation via rose_rt_ioctl(), the structure may be removed while its timer is still active, potentially causing use-after-free issues. This patch changes the type of 'use' from unsigned short to refcount_t and updates all code paths to use rose_neigh_hold() and rose_neigh_put() which operate reference counts atomically.
Quoted source text, attributed separately from HOL analysis.
CVSS is 7.0. 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 CN 4100 (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 | >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <fb07156cc0742ba4e93dfcc84280c011d05b301f || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <f8c29fc437d03a98fb075c31c5be761cc8326284 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <0085b250fcc79f900c82a69980ec2f3e1871823b || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <203e4f42596ede31498744018716a3db6dbb7f51 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d860d1faa6b2ce3becfdb8b0c2b048ad31800061 | fb07156cc0742ba4e93dfcc84280c011d05b301f, f8c29fc437d03a98fb075c31c5be761cc8326284, 0085b250fcc79f900c82a69980ec2f3e1871823b, 203e4f42596ede31498744018716a3db6dbb7f51, d860d1faa6b2ce3becfdb8b0c2b048ad31800061 |
| Linux/Linuxgeneric | 2.6.12 | Not reported |
| Siemens/SIMATIC CN 4100generic | >=0 <V5.0 | V5.0 |
| Siemens/SIMATIC S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.6 <* | * |
| Siemens/SIMATIC S7-1500 CPU 1518F-4 PN/DP MFPgeneric | >=V3.1.6 <* | * |
| Siemens/SIPLUS S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.6 <* | * |
Published upstream
Sep 16, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 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: net: rose: convert 'use' field to refcount_t The 'use' field in struct rose_neigh is used as a reference counter but lacks atomicity. This can lead to race conditions where a rose_neigh structure is freed while still being referenced by other code paths. For example, when rose_neigh->use becomes zero during an ioctl operation via rose_rt_ioctl(), the structure may be removed while its timer is still active, potentially causing use-after-free issues. This patch changes the type of 'use' from unsigned short to refcount_t and updates all code paths to use rose_neigh_hold() and rose_neigh_put() which operate reference counts atomically.
Quoted source text, attributed separately from HOL analysis.