CVE-2026-90306

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> ARM: 9481/2: breakpoint: CFI breakpoints only on demand<br /> <br /> This removes the stub hw_breakpoint_cfi_handler() from ARM, making<br /> it not steal breakpoint type 0x03 (ARM_ENTRY_CFI_BREAKPOINT) unless<br /> CFI is actively used in the kernel.<br /> <br /> When not instrumenting with CFI, or when a breakpoint is issued in<br /> userspace, we fall through to return 1 from hw_breakpoint_pending()<br /> "unhandled fault" so userspace can make use of this breakpoint.<br /> <br /> Tested with LKDTM and this command line:<br /> echo CFI_FORWARD_PROTO &gt; /sys/kernel/debug/provoke-crash/DIRECT<br /> still works as expected.