Answer in brief
CVE-2026-23242 records a High severity (CVSS 7.5) vulnerability in RDMA/siw: Fix potential NULL pointer dereference in header processing. 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-2026-23242 records a High severity (CVSS 7.5) vulnerability in RDMA/siw: Fix potential NULL pointer dereference in header processing. 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 7.5. 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 | >=8b6a361b8c482f22ac99c3273285ff16b23fba91 <ab61841633d10e56a58c1493a262f0d02dba2f5e || >=8b6a361b8c482f22ac99c3273285ff16b23fba91 <8564dcc12fbb372d984ab45768cae9335777b274 || >=8b6a361b8c482f22ac99c3273285ff16b23fba91 <ab957056192d6bd068b3759cb2077d859cca01f0 || >=8b6a361b8c482f22ac99c3273285ff16b23fba91 <ffba40b67663567481fa8a1ed5d2da36897c175d || >=8b6a361b8c482f22ac99c3273285ff16b23fba91 <87b7a036d2c73d5bb3ae2d47dee23de465db3355 || >=8b6a361b8c482f22ac99c3273285ff16b23fba91 <714c99e1dc8f85f446e05be02ba83972e981a817 || >=8b6a361b8c482f22ac99c3273285ff16b23fba91 <ce025f7f5d070596194315eb2e4e89d568b8a755 || >=8b6a361b8c482f22ac99c3273285ff16b23fba91 <14ab3da122bd18920ad57428f6cf4fade8385142 | ab61841633d10e56a58c1493a262f0d02dba2f5e, 8564dcc12fbb372d984ab45768cae9335777b274, ab957056192d6bd068b3759cb2077d859cca01f0, ffba40b67663567481fa8a1ed5d2da36897c175d, 87b7a036d2c73d5bb3ae2d47dee23de465db3355, 714c99e1dc8f85f446e05be02ba83972e981a817, ce025f7f5d070596194315eb2e4e89d568b8a755, 14ab3da122bd18920ad57428f6cf4fade8385142 |
| Linux/Linuxgeneric | 5.3 | Not reported |
| 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
Mar 18, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jul 14, 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: RDMA/siw: Fix potential NULL pointer dereference in header processing If siw_get_hdr() returns -EINVAL before set_rx_fpdu_context(), qp->rx_fpdu can be NULL. The error path in siw_tcp_rx_data() dereferences qp->rx_fpdu->more_ddp_segs without checking, which may lead to a NULL pointer deref. Only check more_ddp_segs when rx_fpdu is present. KASAN splat: [ 101.384271] KASAN: null-ptr-deref in range [0x00000000000000c0-0x00000000000000c7] [ 101.385869] RIP: 0010:siw_tcp_rx_data+0x13ad/0x1e50
Quoted source text, attributed separately from HOL analysis.
CVSS is 7.5. 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 | >=8b6a361b8c482f22ac99c3273285ff16b23fba91 <ab61841633d10e56a58c1493a262f0d02dba2f5e || >=8b6a361b8c482f22ac99c3273285ff16b23fba91 <8564dcc12fbb372d984ab45768cae9335777b274 || >=8b6a361b8c482f22ac99c3273285ff16b23fba91 <ab957056192d6bd068b3759cb2077d859cca01f0 || >=8b6a361b8c482f22ac99c3273285ff16b23fba91 <ffba40b67663567481fa8a1ed5d2da36897c175d || >=8b6a361b8c482f22ac99c3273285ff16b23fba91 <87b7a036d2c73d5bb3ae2d47dee23de465db3355 || >=8b6a361b8c482f22ac99c3273285ff16b23fba91 <714c99e1dc8f85f446e05be02ba83972e981a817 || >=8b6a361b8c482f22ac99c3273285ff16b23fba91 <ce025f7f5d070596194315eb2e4e89d568b8a755 || >=8b6a361b8c482f22ac99c3273285ff16b23fba91 <14ab3da122bd18920ad57428f6cf4fade8385142 | ab61841633d10e56a58c1493a262f0d02dba2f5e, 8564dcc12fbb372d984ab45768cae9335777b274, ab957056192d6bd068b3759cb2077d859cca01f0, ffba40b67663567481fa8a1ed5d2da36897c175d, 87b7a036d2c73d5bb3ae2d47dee23de465db3355, 714c99e1dc8f85f446e05be02ba83972e981a817, ce025f7f5d070596194315eb2e4e89d568b8a755, 14ab3da122bd18920ad57428f6cf4fade8385142 |
| Linux/Linuxgeneric | 5.3 | Not reported |
| 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
Mar 18, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jul 14, 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: RDMA/siw: Fix potential NULL pointer dereference in header processing If siw_get_hdr() returns -EINVAL before set_rx_fpdu_context(), qp->rx_fpdu can be NULL. The error path in siw_tcp_rx_data() dereferences qp->rx_fpdu->more_ddp_segs without checking, which may lead to a NULL pointer deref. Only check more_ddp_segs when rx_fpdu is present. KASAN splat: [ 101.384271] KASAN: null-ptr-deref in range [0x00000000000000c0-0x00000000000000c7] [ 101.385869] RIP: 0010:siw_tcp_rx_data+0x13ad/0x1e50
Quoted source text, attributed separately from HOL analysis.