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CVE-2025-21701

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: net: avoid race between device unregistration and ethnl ops The following trace can be seen if a device is being unregistered w…

Published Feb 13, 2025CWE-362EPSS 0.17%

Overview

CVE-2025-21701 is a high-severity vulnerability. It was published on February 13, 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: avoid race between device unregistration and ethnl ops

The following trace can be seen if a device is being unregistered while

its number of channels are being modified.

DEBUG_LOCKS_WARN_ON(lock->magic != lock)

WARNING: CPU: 3 PID: 3754 at kernel/locking/mutex.c:564 __mutex_lock+0xc8a/0x1120

CPU: 3 UID: 0 PID: 3754 Comm: ethtool Not tainted 6.13.0-rc6+ #771

RIP: 0010:__mutex_lock+0xc8a/0x1120

Call Trace:

<TASK>

ethtool_check_max_channel+0x1ea/0x880

ethnl_set_channels+0x3c3/0xb10

ethnl_default_set_doit+0x306/0x650

genl_family_rcv_msg_doit+0x1e3/0x2c0

genl_rcv_msg+0x432/0x6f0

netlink_rcv_skb+0x13d/0x3b0

genl_rcv+0x28/0x40

netlink_unicast+0x42e/0x720

netlink_sendmsg+0x765/0xc20

__sys_sendto+0x3ac/0x420

__x64_sys_sendto+0xe0/0x1c0

do_syscall_64+0x95/0x180

entry_SYSCALL_64_after_hwframe+0x76/0x7e

This is because unregister_netdevice_many_notify might run before th

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/12e070eb6964b341b41677fd260af5a305316a1fRefgit.kernel.org/stable/c/26bc6076798aa4dc83a07d0a386f9e57c94e8517Refgit.kernel.org/stable/c/2f29127e94ae9fdc7497331003d6860e9551cdf3Refgit.kernel.org/stable/c/4dc880245f9b529fa8f476b5553c799d2848b47bRefgit.kernel.org/stable/c/b1cb37a31a482df3dd35a6ac166282dac47664f4Refgit.kernel.org/stable/c/b382ab9b885cbb665e0e70a727f101c981b4edf3Reflists.debian.org/debian-lts-announce/2025/03/msg00028.htmlRefcert-portal.siemens.com/productcert/html/ssa-082556.html

How CyberStrike helps

Frequently asked questions

What is CVE-2025-21701?

CVE-2025-21701 is a high-severity vulnerability. It was published on February 13, 2025 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2025-21701?

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-2025-21701?

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-2025-21701?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-21701 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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