Answer in brief
CVE-2025-38231 records a Unknown severity vulnerability in nfsd: Initialize ssc before laundromat_work to prevent NULL dereference. 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-2025-38231 records a Unknown severity vulnerability in nfsd: Initialize ssc before laundromat_work to prevent NULL dereference. 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 | >=a4bc287943f5695209ff36bdc89f17b48d68fae7 <deaeb74ae9318252829c59a84a7d2316fc335660 || >=f4e44b393389c77958f7c58bf4415032b4cda15b <0fccf5f01ed28725cc313a66ca1247eef911d55e || >=f4e44b393389c77958f7c58bf4415032b4cda15b <a97668ec6d73dab237cd1c15efe012a10090a4ed || >=f4e44b393389c77958f7c58bf4415032b4cda15b <5060e1a5fef184bd11d298e3f0ee920d96a23236 || >=f4e44b393389c77958f7c58bf4415032b4cda15b <d622c2ee6c08147ab8c9b9e37d93b6e95d3258e0 || >=f4e44b393389c77958f7c58bf4415032b4cda15b <83ac1ba8ca102ab5c0ed4351f8ac6e74ac4d5d64 || >=f4e44b393389c77958f7c58bf4415032b4cda15b <b31da62889e6d610114d81dc7a6edbcaa503fcf8 || >=5.10.220 <5.10.239 | deaeb74ae9318252829c59a84a7d2316fc335660, 0fccf5f01ed28725cc313a66ca1247eef911d55e, a97668ec6d73dab237cd1c15efe012a10090a4ed, 5060e1a5fef184bd11d298e3f0ee920d96a23236, d622c2ee6c08147ab8c9b9e37d93b6e95d3258e0, 83ac1ba8ca102ab5c0ed4351f8ac6e74ac4d5d64, b31da62889e6d610114d81dc7a6edbcaa503fcf8, 5.10.239 |
| Linux/Linuxgeneric | 5.14 | 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
Jul 4, 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: nfsd: Initialize ssc before laundromat_work to prevent NULL dereference In nfs4_state_start_net(), laundromat_work may access nfsd_ssc through nfs4_laundromat -> nfsd4_ssc_expire_umount. If nfsd_ssc isn't initialized, this can cause NULL pointer dereference. Normally the delayed start of laundromat_work allows sufficient time for nfsd_ssc initialization to complete. However, when the kernel waits too long for userspace responses (e.g. in nfs4_state_start_net -> nfsd4_end_grace -> nfsd4_record_grace_done -> nfsd4_cld_grace_done -> cld_pipe_upcall -> __cld_pipe_upcall -> wait_for_completion path), the delayed work may start before nfsd_ssc initialization finishes. Fix this by moving nfsd_ssc initialization before starting laundromat_work.
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 | >=a4bc287943f5695209ff36bdc89f17b48d68fae7 <deaeb74ae9318252829c59a84a7d2316fc335660 || >=f4e44b393389c77958f7c58bf4415032b4cda15b <0fccf5f01ed28725cc313a66ca1247eef911d55e || >=f4e44b393389c77958f7c58bf4415032b4cda15b <a97668ec6d73dab237cd1c15efe012a10090a4ed || >=f4e44b393389c77958f7c58bf4415032b4cda15b <5060e1a5fef184bd11d298e3f0ee920d96a23236 || >=f4e44b393389c77958f7c58bf4415032b4cda15b <d622c2ee6c08147ab8c9b9e37d93b6e95d3258e0 || >=f4e44b393389c77958f7c58bf4415032b4cda15b <83ac1ba8ca102ab5c0ed4351f8ac6e74ac4d5d64 || >=f4e44b393389c77958f7c58bf4415032b4cda15b <b31da62889e6d610114d81dc7a6edbcaa503fcf8 || >=5.10.220 <5.10.239 | deaeb74ae9318252829c59a84a7d2316fc335660, 0fccf5f01ed28725cc313a66ca1247eef911d55e, a97668ec6d73dab237cd1c15efe012a10090a4ed, 5060e1a5fef184bd11d298e3f0ee920d96a23236, d622c2ee6c08147ab8c9b9e37d93b6e95d3258e0, 83ac1ba8ca102ab5c0ed4351f8ac6e74ac4d5d64, b31da62889e6d610114d81dc7a6edbcaa503fcf8, 5.10.239 |
| Linux/Linuxgeneric | 5.14 | 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
Jul 4, 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: nfsd: Initialize ssc before laundromat_work to prevent NULL dereference In nfs4_state_start_net(), laundromat_work may access nfsd_ssc through nfs4_laundromat -> nfsd4_ssc_expire_umount. If nfsd_ssc isn't initialized, this can cause NULL pointer dereference. Normally the delayed start of laundromat_work allows sufficient time for nfsd_ssc initialization to complete. However, when the kernel waits too long for userspace responses (e.g. in nfs4_state_start_net -> nfsd4_end_grace -> nfsd4_record_grace_done -> nfsd4_cld_grace_done -> cld_pipe_upcall -> __cld_pipe_upcall -> wait_for_completion path), the delayed work may start before nfsd_ssc initialization finishes. Fix this by moving nfsd_ssc initialization before starting laundromat_work.
Quoted source text, attributed separately from HOL analysis.