CVE-2026-46192
MediumCVSS 5.5Exploitation Probability (EPSS)
Low risk2th percentile - higher than 2% of all known CVEs
Summary
A vulnerability in the Linux kernel related to the SPI interface in microchips has been resolved, which occurred during emulated read-only dual/quad operations. The issue involved unnecessary data transmission that could lead to transfer failure.
Risk Assessment
Organizations may encounter data transfer issues in systems using the QSPI interface, potentially leading to device failures or data loss.
Recommendation
It is recommended to update the Linux kernel to the latest version to mitigate this vulnerability and to monitor systems utilizing the QSPI interface.
Original NVD description (English source)
In the Linux kernel, the following vulnerability has been resolved: spi: microchip-core-qspi: don't attempt to transmit during emulated read-only dual/quad operations The core will deal with reads by creating clock cycles itself, there's no need to generate clock cycles by transmitting garbage data at the driver level. Further, transmitting garbage data just bricks the transfer since QSPI doesn't have a dedicated master-out line like MOSI in regular SPI. I'm not entirely sure if the transfer is bricked because of the garbage data being transmitted on the bus or because the core loses track of whether it is supposed to be sending or receiving data.