CVE-2025-37966 Information

Description

In the Linux kernel the following vulnerability has been resolved:

riscv: Fix kernel crash due to PR_SET_TAGGED_ADDR_CTRL

When userspace does PR_SET_TAGGED_ADDR_CTRL but Supm extension is not available the kernel crashes:

Oops - illegal instruction [1] [snip] epc : set_tagged_addr_ctrl+0x112/0x15a ra : set_tagged_addr_ctrl+0x74/0x15a epc : ffffffff80011ace ra : ffffffff80011a30 sp : ffffffc60039be10 [snip] status: 0000000200000120 badaddr: 0000000010a79073 cause: 0000000000000002 set_tagged_addr_ctrl+0x112/0x15a __riscv_sys_prctl+0x352/0x73c do_trap_ecall_u+0x17c/0x20c andle_exception+0x150/0x15c

Fix it by checking if Supm is available.

Reference

https://git.kernel.org/stable/c/4b595a2f5656cd45d534ed2160c94f7662adefe5 https://git.kernel.org/stable/c/ae08d55807c099357c047dba17624b09414635dd