Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: netdev: prevent accessing NAPI instances from another namespace The NAPI IDs were not fully exposed to user space prior to the netlink API, so they were never namespaced. The netlink API must ensure that at the very least NAPI instance belongs to the same netns as the owner of the genl sock. napi_by_id() can become static now, but it needs to move because of dev_get_by_napi_id().
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 6.8, < 6.12.10 |
References
- https://git.kernel.org/stable/c/b683ba0df11ff563cc237eb1b74d6adfa77226bfPatch
- https://git.kernel.org/stable/c/d1cacd74776895f6435941f86a1130e58f6dd226Patch
FAQ
What is CVE-2025-21659?
CVE-2025-21659 is a vulnerability with a CVSS score of 5.5 (MEDIUM). In the Linux kernel, the following vulnerability has been resolved: netdev: prevent accessing NAPI instances from another namespace The NAPI IDs were not fully exposed to user space prior to the net...
How severe is CVE-2025-21659?
CVE-2025-21659 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-21659?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.