CVE-2026-68088 usb: gadget: function: rndis: add length check to response query
A missing length check in the Linux kernel's RNDIS USB gadget driver allows attackers to cause a denial of service via malformed queries.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-68088?
CVE-2026-68088 is a denial of service vulnerability in Linux, published on 10 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
usb: gadget: function: rndis: add length check to response query
Add variable representations for BufLength and BufOffset in rndis_query_response(), and perform a length check on them.
This is identical to how rndis_set_response() handles these parameters.
Which versions are affected by CVE-2026-68088?
How do I fix CVE-2026-68088?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-68088 being exploited?
There is no known exploitation of CVE-2026-68088 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-68088, DEBIAN-CVE-2026-68088, GHSA-56w3-ch4f-hr74, UBUNTU-CVE-2026-68088.