Answer in brief
CVE-2026-23434 records a High severity (CVSS 7.1) vulnerability in mtd: rawnand: serialize lock/unlock against other NAND operations. 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-2026-23434 records a High severity (CVSS 7.1) vulnerability in mtd: rawnand: serialize lock/unlock against other NAND operations. 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 7.1. 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 | >=92270086b7e5ada7ab381c06cc3da2e95ed17088 <28ea836cc44cb8b89c1c174707ead0c1133c60e9 || >=92270086b7e5ada7ab381c06cc3da2e95ed17088 <fe4a73c3dd48308149d57a10c2761e1d36ced7ba || >=92270086b7e5ada7ab381c06cc3da2e95ed17088 <ce5229e78078e437704157eb542f43a6f83b429b || >=92270086b7e5ada7ab381c06cc3da2e95ed17088 <a80291e577b44593a724d6cd64c14337c78f194d || >=92270086b7e5ada7ab381c06cc3da2e95ed17088 <f71ce0ae5aefe39dd5b2f996c0e08550d2153ad2 || >=92270086b7e5ada7ab381c06cc3da2e95ed17088 <5fd5c078af23cb353507aa522e09d557d7eaef04 || >=92270086b7e5ada7ab381c06cc3da2e95ed17088 <f25446e2c28939753d3b62d34dfda49952b2557d || >=92270086b7e5ada7ab381c06cc3da2e95ed17088 <bab2bc6e850a697a23b9e5f0e21bb8c187615e95 | 28ea836cc44cb8b89c1c174707ead0c1133c60e9, fe4a73c3dd48308149d57a10c2761e1d36ced7ba, ce5229e78078e437704157eb542f43a6f83b429b, a80291e577b44593a724d6cd64c14337c78f194d, f71ce0ae5aefe39dd5b2f996c0e08550d2153ad2, 5fd5c078af23cb353507aa522e09d557d7eaef04, f25446e2c28939753d3b62d34dfda49952b2557d, bab2bc6e850a697a23b9e5f0e21bb8c187615e95 |
| Linux/Linuxgeneric | 5.7 | 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
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: rawnand: serialize lock/unlock against other NAND operations nand_lock() and nand_unlock() call into chip->ops.lock_area/unlock_area without holding the NAND device lock. On controllers that implement SET_FEATURES via multiple low-level PIO commands, these can race with concurrent UBI/UBIFS background erase/write operations that hold the device lock, resulting in cmd_pending conflicts on the NAND controller. Add nand_get_device()/nand_release_device() around the lock/unlock operations to serialize them against all other NAND controller access.
Quoted source text, attributed separately from HOL analysis.
CVSS is 7.1. 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 | >=92270086b7e5ada7ab381c06cc3da2e95ed17088 <28ea836cc44cb8b89c1c174707ead0c1133c60e9 || >=92270086b7e5ada7ab381c06cc3da2e95ed17088 <fe4a73c3dd48308149d57a10c2761e1d36ced7ba || >=92270086b7e5ada7ab381c06cc3da2e95ed17088 <ce5229e78078e437704157eb542f43a6f83b429b || >=92270086b7e5ada7ab381c06cc3da2e95ed17088 <a80291e577b44593a724d6cd64c14337c78f194d || >=92270086b7e5ada7ab381c06cc3da2e95ed17088 <f71ce0ae5aefe39dd5b2f996c0e08550d2153ad2 || >=92270086b7e5ada7ab381c06cc3da2e95ed17088 <5fd5c078af23cb353507aa522e09d557d7eaef04 || >=92270086b7e5ada7ab381c06cc3da2e95ed17088 <f25446e2c28939753d3b62d34dfda49952b2557d || >=92270086b7e5ada7ab381c06cc3da2e95ed17088 <bab2bc6e850a697a23b9e5f0e21bb8c187615e95 | 28ea836cc44cb8b89c1c174707ead0c1133c60e9, fe4a73c3dd48308149d57a10c2761e1d36ced7ba, ce5229e78078e437704157eb542f43a6f83b429b, a80291e577b44593a724d6cd64c14337c78f194d, f71ce0ae5aefe39dd5b2f996c0e08550d2153ad2, 5fd5c078af23cb353507aa522e09d557d7eaef04, f25446e2c28939753d3b62d34dfda49952b2557d, bab2bc6e850a697a23b9e5f0e21bb8c187615e95 |
| Linux/Linuxgeneric | 5.7 | 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
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: rawnand: serialize lock/unlock against other NAND operations nand_lock() and nand_unlock() call into chip->ops.lock_area/unlock_area without holding the NAND device lock. On controllers that implement SET_FEATURES via multiple low-level PIO commands, these can race with concurrent UBI/UBIFS background erase/write operations that hold the device lock, resulting in cmd_pending conflicts on the NAND controller. Add nand_get_device()/nand_release_device() around the lock/unlock operations to serialize them against all other NAND controller access.
Quoted source text, attributed separately from HOL analysis.