CVE-2026-31741 counter: rz-mtu3-cnt: prevent counter from being toggled multiple times

In the Linux kernel, the following vulnerability has been resolved: counter: rz-mtu3-cnt: prevent counter from being toggled multiple times Runtime PM counter is incremented / decremented each time the sysfs enable file is written to. If user writes 0 to the sysfs enable file multiple times,...

CVE-2026-31741

CVE-2026-31741 affects the Linux kernel rz-mtu3-cnt counter module. Repeated writes to the sysfs enable file can underflow/overflow the Runtime PM usage count, causing clocked-off hardware register accesses and potential instability/DoS. The issue is resolved in upstream kernel (v6.6.137) and dis...