CVE-2026-80814 rndis_host: add overflow check in rndis_rx_fixup()
An integer overflow in the Linux kernel rndis_host driver allows out-of-bounds reads, potentially leading to information disclosure or crashes.
- 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-2026-80814?
CVE-2026-80814 is a vulnerability in Linux, published on 4 Sep 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:
rndis_host: add overflow check in rndis_rx_fixup()
Add an overflow check to ensure that data_offset + data_len + 8 does not wrap, which would enable an OOB read of the USB data buffer.
Which versions are affected by CVE-2026-80814?
How do I fix CVE-2026-80814?
Apply the vendor's patch.
Is CVE-2026-80814 being exploited?
There is no known exploitation of CVE-2026-80814 in the wild and no public exploit code.
Sources
Also known as AZL-99452, BELL-CVE-2026-80814, DEBIAN-CVE-2026-80814, GHSA-q3pm-8xxp-ww85, UBUNTU-CVE-2026-80814.