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CVE-2025-39908

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: net: dev_ioctl: take ops lock in hwtstamp lower paths ndo hwtstamp callbacks are expected to run under the per-device ops lock.

Published Oct 1, 2025EPSS 0.14%

Overview

CVE-2025-39908 is a high-severity vulnerability. It was published on October 1, 2025 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. 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:

net: dev_ioctl: take ops lock in hwtstamp lower paths

ndo hwtstamp callbacks are expected to run under the per-device ops

lock. Make the lower get/set paths consistent with the rest of ndo

invocations.

Kernel log:

WARNING: CPU: 13 PID: 51364 at ./include/net/netdev_lock.h:70 __netdev_update_features+0x4bd/0xe60

...

RIP: 0010:__netdev_update_features+0x4bd/0xe60

...

Call Trace:

<TASK>

netdev_update_features+0x1f/0x60

mlx5_hwtstamp_set+0x181/0x290 [mlx5_core]

mlx5e_hwtstamp_set+0x19/0x30 [mlx5_core]

dev_set_hwtstamp_phylib+0x9f/0x220

dev_set_hwtstamp_phylib+0x9f/0x220

dev_set_hwtstamp+0x13d/0x240

dev_ioctl+0x12f/0x4b0

sock_ioctl+0x171/0x370

__x64_sys_ioctl+0x3f7/0x900

? __sys_setsockopt+0x69/0xb0

do_syscall_64+0x6f/0x2e0

entry_SYSCALL_64_after_hwframe+0x4b/0x53

...

</TASK>

....

---[ end trace 0000000000000000 ]---

Note that the mlx5_hwtstamp_set and mlx5e_hwtstamp_set functions shown

in the trace come from an in prog

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/2d92fa0cdc02291de57f72170e8b60cef0cf5372Refgit.kernel.org/stable/c/686cab5a18e443e1d5f2abb17bed45837836425f

How CyberStrike helps

Frequently asked questions

What is CVE-2025-39908?

CVE-2025-39908 is a high-severity vulnerability. It was published on October 1, 2025 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2025-39908?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2025-39908?

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-2025-39908?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-39908 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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