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    <link>https://vulnerability.circl.lu</link>
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      <title>CVE-2025-37966 — riscv: Fix kernel crash due to PR_SET_TAGGED_ADDR_CTRL</title>
      <link>https://vulnerability.circl.lu/vuln/cve-2025-37966</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Linux&lt;/p&gt;
&lt;p&gt;In the Linux kernel, the following vulnerability has been resolved:&lt;/p&gt;
&lt;p&gt;riscv: Fix kernel crash due to PR_SET_TAGGED_ADDR_CTRL&lt;/p&gt;
&lt;p&gt;When userspace does PR_SET_TAGGED_ADDR_CTRL, but Supm extension is not
available, the kernel crashes:&lt;/p&gt;
&lt;p&gt;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&lt;/p&gt;
&lt;p&gt;Fix it by checking if Supm is available.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Linux&lt;/p&gt;
&lt;p&gt;In the Linux kernel, the following vulnerability has been resolved:&lt;/p&gt;
&lt;p&gt;riscv: Fix kernel crash due to PR_SET_TAGGED_ADDR_CTRL&lt;/p&gt;
&lt;p&gt;When userspace does PR_SET_TAGGED_ADDR_CTRL, but Supm extension is not
available, the kernel crashes:&lt;/p&gt;
&lt;p&gt;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&lt;/p&gt;
&lt;p&gt;Fix it by checking if Supm is available.&lt;/p&gt;</content:encoded>
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