CVE-2026-72146

Summary

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().

Affected Software

VendorProductVersion RangeStatus
LinuxLinux5000d37042a61ca556fde2782ca40dbfa802ea16 < 5b12de6229d662864ee22c11d4876652b40120f0affected
LinuxLinux5000d37042a61ca556fde2782ca40dbfa802ea16 < 2a4d9e2234c3f817bb0ddbc8680d09ce9be84f93affected
LinuxLinux5000d37042a61ca556fde2782ca40dbfa802ea16 < ec9f66c91bffdb69d309bae6dfb387562db7ebc8affected
LinuxLinux5000d37042a61ca556fde2782ca40dbfa802ea16 < 07ae600bd353b22f31a8f1007269744fafc7f123affected
LinuxLinux5000d37042a61ca556fde2782ca40dbfa802ea16 < 731712403ddb39d1a76a11abf339a0615bc85de7affected
LinuxLinux5.15affected
LinuxLinux0 < 5.15unaffected
LinuxLinux6.6.148 <= 6.6.*unaffected
LinuxLinux6.12.101 <= 6.12.*unaffected
LinuxLinux6.18.42 <= 6.18.*unaffected
LinuxLinux7.1.5 <= 7.1.*unaffected
LinuxLinux7.2 <= *unaffected

Weaknesses

References