What is CVE-2025-37993?

CVE-2025-37993 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, affecting Linux kernel versions from 6.9 onward and patched in 6.12.29, 6.14.7 and 6.15. CVE-2025-37993 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2025-37993?

CVE-2025-37993 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-2025-37993?

Yes, CVE-2025-37993 has been patched. Fixed versions include 6.12.29, 6.14.7 and 6.15. If you are running Linux kernel 6.9 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2025-37993 actively exploited?

CVE-2025-37993 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2025-37993

Medium

In the Linux kernel, the following vulnerability has been resolved: can: m_can: m_can_class_allocate_dev(): initialize spin lock on device probe The spin lock tx_handling_spinlock in struct m_can_classdev is not being initialized. This leads the following spinlock bad magic complaint from the kernel, eg. when trying to send CAN frames with cansend from can-utils: | BUG: spinlock bad magic on CPU#0, cansend/95 | lock: 0xff60000002ec1010, .magic: 00000000, .owner: <none>/-1, .owner_cpu: 0 | CPU: 0 UID: 0 PID: 95 Comm: cansend Not tainted 6.15.0-rc3-00032-ga79be02bba5c #5 NONE | Hardware name: MachineWare SIM-V (DT) | Call Trace: | [<ffffffff800133e0>] dump_backtrace+0x1c/0x24 | [<ffffffff800022f2>] show_stack+0x28/0x34 | [<ffffffff8000de3e>] dump_stack_lvl+0x4a/0x68 | [<ffffffff8000de70>] dump_stack+0x14/0x1c | [<ffffffff80003134>] spin_dump+0x62/0x6e | [<ffffffff800883ba>] do_raw_spin_lock+0xd0/0x142 | [<ffffffff807a6fcc>] _raw_spin_lock_irqsave+0x20/0x2c | [<ffffffff80536dba>] m_can_start_xmit+0x90/0x34a | [<ffffffff806148b0>] dev_hard_start_xmit+0xa6/0xee | [<ffffffff8065b730>] sch_direct_xmit+0x114/0x292 | [<ffffffff80614e2a>] __dev_queue_xmit+0x3b0/0xaa8 | [<ffffffff8073b8fa>] can_send+0xc6/0x242 | [<ffffffff8073d1c0>] raw_sendmsg+0x1a8/0x36c | [<ffffffff805ebf06>] sock_write_iter+0x9a/0xee | [<ffffffff801d06ea>] vfs_write+0x184/0x3a6 | [<ffffffff801d0a88>] ksys_write+0xa0/0xc0 | [<ffffffff801d0abc>] __riscv_sys_write+0x14/0x1c | [<ffffffff8079ebf8>] do_trap_ecall_u+0x168/0x212 | [<ffffffff807a830a>] handle_exception+0x146/0x152 Initializing the spin lock in m_can_class_allocate_dev solves that problem.

Package Linux Kernel

Published 2025-05-29

Last modified 2025-11-14

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 6.9 and later are affected. Fixed in 6.12.29, 6.14.7, 6.15 and their respective stable series.

Affected from

≥ 6.9

Fixed in

✓ 6.12.29 6.12.x ✓ 6.14.7 6.14.x ✓ 6.15

References

The following references provide additional information about CVE-2025-37993 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/2ecce25ea296f328d79070ee36229a15aeeb7aca
Patch
Kernel patch commit
https://git.kernel.org/stable/c/7d5379cfecfdd665e4206bc4f19824656388779f
Patch
Kernel patch commit
https://git.kernel.org/stable/c/dcaeeb8ae84c5506ebc574732838264f3887738c
Patch

Details

CVE ID CVE-2025-37993

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2025-05-29

Modified 2025-11-14

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2025-37993?

CVE-2025-37993 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 6.9 onward and has been patched in 6.12.29, 6.14.7 and 6.15. CVE-2025-37993 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2025-37993?

CVE-2025-37993 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-2025-37993?

Yes — CVE-2025-37993 has been patched. Fixed versions include 6.12.29, 6.14.7 and 6.15. If you are running Linux kernel 6.9 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2025-37993 actively exploited?

No — CVE-2025-37993 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.