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CVE-2025-37966 – RISC-V Linux PR_SET_TAGGED_ADDR_CTRL Kernel Crash Vulnerability

The following table lists the changes that have been made to the
CVE-2025-37966 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution
of a vulnerability, and for identifying the most recent changes that may
impact the vulnerability’s severity, exploitability, or other characteristics.

  • New CVE Received
    by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    May. 20, 2025

    Action Type Old Value New Value
    Added 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.
    Added Reference https://git.kernel.org/stable/c/4b595a2f5656cd45d534ed2160c94f7662adefe5
    Added Reference https://git.kernel.org/stable/c/ae08d55807c099357c047dba17624b09414635dd
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