Go to homepageCyberStrike

Menu

Star on GitHub · 3.2k
Sign inDownload

CVE-2025-39947

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: net/mlx5e: Harden uplink netdev access against device unbind The function mlx5_uplink_netdev_get() gets the uplink netdevice po…

Published Oct 4, 2025CWE-476EPSS 0.15%

Overview

CVE-2025-39947 is a medium-severity vulnerability. It was published on October 4, 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:

net/mlx5e: Harden uplink netdev access against device unbind

The function mlx5_uplink_netdev_get() gets the uplink netdevice

pointer from mdev->mlx5e_res.uplink_netdev. However, the netdevice can

be removed and its pointer cleared when unbound from the mlx5_core.eth

driver. This results in a NULL pointer, causing a kernel panic.

BUG: unable to handle page fault for address: 0000000000001300

at RIP: 0010:mlx5e_vport_rep_load+0x22a/0x270 [mlx5_core]

Call Trace:

<TASK>

mlx5_esw_offloads_rep_load+0x68/0xe0 [mlx5_core]

esw_offloads_enable+0x593/0x910 [mlx5_core]

mlx5_eswitch_enable_locked+0x341/0x420 [mlx5_core]

mlx5_devlink_eswitch_mode_set+0x17e/0x3a0 [mlx5_core]

devlink_nl_eswitch_set_doit+0x60/0xd0

genl_family_rcv_msg_doit+0xe0/0x130

genl_rcv_msg+0x183/0x290

netlink_rcv_skb+0x4b/0xf0

genl_rcv+0x24/0x40

netlink_unicast+0x255/0x380

netlink_sendmsg+0x1f3/0x420

__sock_sendmsg+0x38/0x60

__sy

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/2cb17c88edd3a1c7aa6bc880dcdb35a6866fcb2eRefgit.kernel.org/stable/c/6b4be64fd9fec16418f365c2d8e47a7566e9eba5Refgit.kernel.org/stable/c/8df354eb2dd63d111ed5ae2e956e0dbb22bcf93bRefgit.kernel.org/stable/c/d1f3db4e7a3be29fc17f01850f162363f919370d

How CyberStrike helps

Frequently asked questions

What is CVE-2025-39947?

CVE-2025-39947 is a medium-severity vulnerability. It was published on October 4, 2025 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2025-39947?

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-2025-39947?

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-2025-39947?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-39947 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.

Related MEDIUM CVEs from 2025

View all
Browse by year2026202520242023202220212020201920182017201620152014201320122011201020092008200720062005200420032002200120001999