Go to homepageCyberStrike

Menu

Star on GitHub · 3.2k
Sign inDownload

CVE-2025-39826

8.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: net: rose: convert 'use' field to refcount_t The 'use' field in struct rose_neigh is used as a reference counter but lacks atom…

Published Sep 16, 2025CWE-416EPSS 0.21%

Overview

CVE-2025-39826 is a high-severity vulnerability. It was published on September 16, 2025 and has a CVSS 3.1 base score of 8.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

net: rose: convert 'use' field to refcount_t

The 'use' field in struct rose_neigh is used as a reference counter but

lacks atomicity. This can lead to race conditions where a rose_neigh

structure is freed while still being referenced by other code paths.

For example, when rose_neigh->use becomes zero during an ioctl operation

via rose_rt_ioctl(), the structure may be removed while its timer is

still active, potentially causing use-after-free issues.

This patch changes the type of 'use' from unsigned short to refcount_t and

updates all code paths to use rose_neigh_hold() and rose_neigh_put() which

operate reference counts atomically.

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/0085b250fcc79f900c82a69980ec2f3e1871823bRefgit.kernel.org/stable/c/203e4f42596ede31498744018716a3db6dbb7f51Refgit.kernel.org/stable/c/d860d1faa6b2ce3becfdb8b0c2b048ad31800061Refgit.kernel.org/stable/c/f8c29fc437d03a98fb075c31c5be761cc8326284Refgit.kernel.org/stable/c/fb07156cc0742ba4e93dfcc84280c011d05b301fReflists.debian.org/debian-lts-announce/2025/10/msg00008.htmlRefcert-portal.siemens.com/productcert/html/ssa-019113.htmlRefcert-portal.siemens.com/productcert/html/ssa-032379.html

How CyberStrike helps

Frequently asked questions

What is CVE-2025-39826?

CVE-2025-39826 is a high-severity vulnerability. It was published on September 16, 2025 and has a CVSS 3.1 base score of 8.8 (HIGH).

How severe is CVE-2025-39826?

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2025-39826?

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-2025-39826?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-39826 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 HIGH CVEs from 2025

View all
Browse by year2026202520242023202220212020201920182017201620152014201320122011201020092008200720062005200420032002200120001999