Answer in brief
CVE-2026-23474 records a Medium severity (CVSS 5.5) vulnerability in mtd: Avoid boot crash in RedBoot partition table parser. 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-2026-23474 records a Medium severity (CVSS 5.5) vulnerability in mtd: Avoid boot crash in RedBoot partition table parser. 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 | >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ca235d11fc2fd8fce1dcd9d732dc780be0cde2de || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e0065e106f798ce6862251bc4fc030ac5cead940 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <0b08be5aca212a99f8ba786fee4922feac08002c || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d8570211a2b1ec886a462daa0be4e9983ac768bb || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <2025b2d1f9d5cad6ea6fe85654c6c41297c3130b || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <c4054ad2d8bff4e8e937cd4a1d1a04c1e8f77a2c || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <75a4d8cfe7784f909b3bd69325abac8e04ecb385 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <8e2f8020270af7777d49c2e7132260983e4fc566 | ca235d11fc2fd8fce1dcd9d732dc780be0cde2de, e0065e106f798ce6862251bc4fc030ac5cead940, 0b08be5aca212a99f8ba786fee4922feac08002c, d8570211a2b1ec886a462daa0be4e9983ac768bb, 2025b2d1f9d5cad6ea6fe85654c6c41297c3130b, c4054ad2d8bff4e8e937cd4a1d1a04c1e8f77a2c, 75a4d8cfe7784f909b3bd69325abac8e04ecb385, 8e2f8020270af7777d49c2e7132260983e4fc566 |
| Linux/Linuxgeneric | 2.6.12 | 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 | >=V3.1.5 <* | * |
| Siemens/SIPLUS S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.6 <* | * |
Published upstream
Apr 3, 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: mtd: Avoid boot crash in RedBoot partition table parser Given CONFIG_FORTIFY_SOURCE=y and a recent compiler, commit 439a1bcac648 ("fortify: Use __builtin_dynamic_object_size() when available") produces the warning below and an oops. Searching for RedBoot partition table in 50000000.flash at offset 0x7e0000 ------------[ cut here ]------------ WARNING: lib/string_helpers.c:1035 at 0xc029e04c, CPU#0: swapper/0/1 memcmp: detected buffer overflow: 15 byte read of buffer size 14 Modules linked in: CPU: 0 UID: 0 PID: 1 Comm: swapper/0 Not tainted 6.19.0 #1 NONE As Kees said, "'names' is pointing to the final 'namelen' many bytes of the allocation ... 'namelen' could be basically any length at all. This fortify warning looks legit to me -- this code used to be reading beyond the end of the allocation." Since the size of the dynamic allocation is calculated with strlen() we can use strcmp() instead of memcmp() and remain within bounds.
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 | >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ca235d11fc2fd8fce1dcd9d732dc780be0cde2de || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e0065e106f798ce6862251bc4fc030ac5cead940 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <0b08be5aca212a99f8ba786fee4922feac08002c || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d8570211a2b1ec886a462daa0be4e9983ac768bb || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <2025b2d1f9d5cad6ea6fe85654c6c41297c3130b || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <c4054ad2d8bff4e8e937cd4a1d1a04c1e8f77a2c || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <75a4d8cfe7784f909b3bd69325abac8e04ecb385 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <8e2f8020270af7777d49c2e7132260983e4fc566 | ca235d11fc2fd8fce1dcd9d732dc780be0cde2de, e0065e106f798ce6862251bc4fc030ac5cead940, 0b08be5aca212a99f8ba786fee4922feac08002c, d8570211a2b1ec886a462daa0be4e9983ac768bb, 2025b2d1f9d5cad6ea6fe85654c6c41297c3130b, c4054ad2d8bff4e8e937cd4a1d1a04c1e8f77a2c, 75a4d8cfe7784f909b3bd69325abac8e04ecb385, 8e2f8020270af7777d49c2e7132260983e4fc566 |
| Linux/Linuxgeneric | 2.6.12 | 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 | >=V3.1.5 <* | * |
| Siemens/SIPLUS S7-1500 CPU 1518-4 PN/DP MFPgeneric | >=V3.1.6 <* | * |
Published upstream
Apr 3, 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: mtd: Avoid boot crash in RedBoot partition table parser Given CONFIG_FORTIFY_SOURCE=y and a recent compiler, commit 439a1bcac648 ("fortify: Use __builtin_dynamic_object_size() when available") produces the warning below and an oops. Searching for RedBoot partition table in 50000000.flash at offset 0x7e0000 ------------[ cut here ]------------ WARNING: lib/string_helpers.c:1035 at 0xc029e04c, CPU#0: swapper/0/1 memcmp: detected buffer overflow: 15 byte read of buffer size 14 Modules linked in: CPU: 0 UID: 0 PID: 1 Comm: swapper/0 Not tainted 6.19.0 #1 NONE As Kees said, "'names' is pointing to the final 'namelen' many bytes of the allocation ... 'namelen' could be basically any length at all. This fortify warning looks legit to me -- this code used to be reading beyond the end of the allocation." Since the size of the dynamic allocation is calculated with strlen() we can use strcmp() instead of memcmp() and remain within bounds.
Quoted source text, attributed separately from HOL analysis.