CVE-2025-39872
hsr: hold rcu and dev lock for hsr_get_port_ndev
Description
In the Linux kernel, the following vulnerability has been resolved: hsr: hold rcu and dev lock for hsr_get_port_ndev hsr_get_port_ndev calls hsr_for_each_port, which need to hold rcu lock. On the other hand, before return the port device, we need to hold the device reference to avoid UaF in the caller function.
INFO
Published Date :
Sept. 23, 2025, 6:15 a.m.
Last Modified :
Sept. 23, 2025, 6:15 a.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Affected Products
The following products are affected by CVE-2025-39872
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
Solution
- Hold RCU lock when iterating over ports.
- Hold device reference before returning port device.
- Ensure locks are correctly acquired and released.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2025-39872.
| URL | Resource |
|---|---|
| https://git.kernel.org/stable/c/68a6729afd3e8e9a2a32538642ce92b96ccf9b1d | |
| https://git.kernel.org/stable/c/847748fc66d08a89135a74e29362a66ba4e3ab15 |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2025-39872 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2025-39872
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2025-39872 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2025-39872 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Sep. 23, 2025
Action Type Old Value New Value Added Description In the Linux kernel, the following vulnerability has been resolved: hsr: hold rcu and dev lock for hsr_get_port_ndev hsr_get_port_ndev calls hsr_for_each_port, which need to hold rcu lock. On the other hand, before return the port device, we need to hold the device reference to avoid UaF in the caller function. Added Reference https://git.kernel.org/stable/c/68a6729afd3e8e9a2a32538642ce92b96ccf9b1d Added Reference https://git.kernel.org/stable/c/847748fc66d08a89135a74e29362a66ba4e3ab15