What is CVE-2025-37966?

CVE-2025-37966 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, affecting Linux kernel versions from 6.13 onward and patched in 6.14.7 and 6.15. CVE-2025-37966 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2025-37966?

CVE-2025-37966 has a CVSS score of 5.5 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2025-37966?

Yes, CVE-2025-37966 has been patched. Fixed versions include 6.14.7 and 6.15. If you are running Linux kernel 6.13 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2025-37966 actively exploited?

CVE-2025-37966 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2025-37966

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 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.

Package Linux Kernel

Published 2025-05-20

Last modified 2026-03-17

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

5.5

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected versions

Linux kernel versions 6.13 and later are affected. Fixed in 6.14.7, 6.15 and their respective stable series.

Affected from

≥ 6.13

Fixed in

✓ 6.14.7 6.14.x ✓ 6.15

References

The following references provide additional information about CVE-2025-37966 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Kernel patch commit
https://git.kernel.org/stable/c/4b595a2f5656cd45d534ed2160c94f7662adefe5
Patch
Kernel patch commit
https://git.kernel.org/stable/c/ae08d55807c099357c047dba17624b09414635dd
Patch

Details

CVE ID CVE-2025-37966

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2025-05-20

Modified 2026-03-17

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2025-37966?

CVE-2025-37966 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 6.13 onward and has been patched in 6.14.7 and 6.15. CVE-2025-37966 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2025-37966?

CVE-2025-37966 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2025-37966?

Yes — CVE-2025-37966 has been patched. Fixed versions include 6.14.7 and 6.15. If you are running Linux kernel 6.13 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2025-37966 actively exploited?

No — CVE-2025-37966 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.