CVE-2026-98578 nfc: st21nfca: validate ISO15693 inventory length
A missing length check in the Linux kernel NFC driver allows attackers to cause a denial of service via malformed ISO15693 inventory data.
- 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-2026-98578?
CVE-2026-98578 is a denial of service vulnerability in Linux, published on 18 Oct 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: st21nfca: validate ISO15693 inventory length
The ISO15693 inventory helper removes a two-byte prefix without checking that it exists, then accepts a one-byte remainder before reading data[1] as the DSFID.
Require the prefix and at least two remaining bytes before copying the UID data and reading the DSFID.
Which versions are affected by CVE-2026-98578?
How do I fix CVE-2026-98578?
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-2026-98578 being exploited?
There is no known exploitation of CVE-2026-98578 in the wild and no public exploit code.
Sources
Also known as AZL-108629, BELL-CVE-2026-98578, DEBIAN-CVE-2026-98578, GHSA-mm2q-hf2x-48gq, UBUNTU-CVE-2026-98578.