CVE-2026-80801 nfc: microread: validate target discovery payload lengths
A missing length validation in the Linux kernel NFC microread driver allows attackers to trigger memory corruption via crafted NFC payloads.
- 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-2026-80801?
CVE-2026-80801 is a memory corruption 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:
nfc: microread: validate target discovery payload lengths
microread_target_discovered() parses target discovery payloads from skb->data according to the HCI gate. The fixed field offsets and UID copies were checked only against the destination nfc_target buffers, not against the actual skb length.
Validate that each gate-specific payload contains the fixed fields and UID bytes before reading or copying them.
Which versions are affected by CVE-2026-80801?
How do I fix CVE-2026-80801?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-80801 being exploited?
There is no known exploitation of CVE-2026-80801 in the wild and no public exploit code.
Sources
Also known as AZL-99522, BELL-CVE-2026-80801, DEBIAN-CVE-2026-80801, GHSA-w7m7-vh5w-6jvg, UBUNTU-CVE-2026-80801.