CVE-2026-68466
HighCVSS 8.8Exploitation Probability (EPSS)
Low risk3th percentile - higher than 3% of all known CVEs
Summary
In the Linux kernel's NAND driver lpc32xx_slc, there is an issue with DMA timeout handling: lpc32xx_xmit_dma() ignores the result of wait_for_completion_timeout(), causing a timed-out DMA transfer to be reported as successful. The fix returns -ETIMEDOUT and terminates the DMA channel before unmapping the scatterlist.
Risk Assessment
Incorrect success reporting may lead to data corruption or system malfunction, as the DMA transfer may still access the buffer after the error is returned.
Recommendation
Apply the Linux kernel update containing the fix for CVE-2026-68466. Ensure systems with LPC32xx NAND controller have the updated kernel.
Original NVD description (English source)
In the Linux kernel, the following vulnerability has been resolved: mtd: rawnand: lpc32xx_slc: fail DMA transfer on completion timeout lpc32xx_xmit_dma() waits for the DMA completion callback but ignores wait_for_completion_timeout(). A timed out DMA transfer is therefore unmapped and reported as successful to the NAND read/write path. Return -ETIMEDOUT when the completion wait expires. Terminate the DMA channel before unmapping the scatterlist so the timed out transfer cannot continue to access the buffer after the error is returned.