Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net: xdp: Disallow attaching device-bound programs in generic mode Device-bound programs are used to support RX metadata kfuncs. These kfuncs are driver-specific and rely on the driver context to read the metadata. This means they can't work in generic XDP mode. However, there is no check to disallow such programs from being attached in generic mode, in which case the metadata kfuncs will be called in an invalid context, leading to crashes. Fix this by adding a check to disallow attaching device-bound programs in generic mode.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 6.3, < 6.6.76 |
References
- https://git.kernel.org/stable/c/3595599fa8360bb3c7afa7ee50c810b4a64106eaPatch
- https://git.kernel.org/stable/c/557707906dd3e34b8a8c265f664d19f95799937ePatch
- https://git.kernel.org/stable/c/5a9eae683d6c36e8a7aa31e5eb8b369e41aa66e1Patch
- https://git.kernel.org/stable/c/b1bc4a35a04cbeb85b6ef5911ec015baa424989fPatch
FAQ
What is CVE-2025-21808?
CVE-2025-21808 is a vulnerability with a CVSS score of 5.5 (MEDIUM). In the Linux kernel, the following vulnerability has been resolved: net: xdp: Disallow attaching device-bound programs in generic mode Device-bound programs are used to support RX metadata kfuncs. T...
How severe is CVE-2025-21808?
CVE-2025-21808 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-2025-21808?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.