CVE-2026-72146
HighCVSS 8.4Exploitation Probability (EPSS)
Low risk8th percentile - higher than 8% of all known CVEs
Summary
In the Linux kernel rz-dmac driver, the interrupt is requested before full initialization, which can lead to invalid memory access because the interrupt handler may access uninitialized data. The fix moves interrupt requests after setup is complete and uses dmam_alloc_coherent().
Risk Assessment
Invalid memory access can cause system crashes or data corruption.
Recommendation
Apply the Linux kernel update containing this fix to avoid memory issues.
Original NVD description (English source)
In the Linux kernel, the following vulnerability has been resolved: dmaengine: sh: rz-dmac: Move interrupt request after everything is set up Once the interrupt is requested, the interrupt handler may run immediately. Since the IRQ handler can access channel->ch_base, which is initialized only after requesting the IRQ, this may lead to invalid memory access. Likewise, the IRQ thread may access uninitialized data (the ld_free, ld_queue, and ld_active lists), which may also lead to issues. Request the interrupts only after everything is set up. To keep the error path simpler, use dmam_alloc_coherent() instead of dma_alloc_coherent().