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CVE-2025-37966

5.5 · MEDIUM

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 a…

Published May 20, 2025EPSS 0.16%

Overview

CVE-2025-37966 is a medium-severity vulnerability. It was published on May 20, 2025 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/4b595a2f5656cd45d534ed2160c94f7662adefe5Refgit.kernel.org/stable/c/ae08d55807c099357c047dba17624b09414635dd

How CyberStrike helps

Frequently asked questions

What is CVE-2025-37966?

CVE-2025-37966 is a medium-severity vulnerability. It was published on May 20, 2025 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2025-37966?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2025-37966?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2025-37966?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-37966 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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