CVE-2026-80797 nfc: pn533: purge fragmented skbs during cleanup
A memory leak in the Linux kernel NFC driver allows local attackers to cause denial of service by triggering device removal with queued fragments.
- 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-2026-80797?
CVE-2026-80797 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: pn533: purge fragmented skbs during cleanup
pn53x_common_clean() purges resp_q before freeing the common PN533 state, but it leaves fragment_skb untouched. The fragmentation helpers queue transmit fragments there while sending large initiator or target-mode frames, and those skbs remain owned by the driver until they are sent or discarded.
If the device is removed while fragments are still queued, the common cleanup path frees the PN533 state without releasing the queued fragment skbs, leaking them.
Purge fragment_skb during cleanup alongside resp_q.
Which versions are affected by CVE-2026-80797?
How do I fix CVE-2026-80797?
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-2026-80797 being exploited?
There is no known exploitation of CVE-2026-80797 in the wild and no public exploit code.
Sources
Also known as AZL-99494, BELL-CVE-2026-80797, DEBIAN-CVE-2026-80797, GHSA-4h9c-xj6x-wv3f, UBUNTU-CVE-2026-80797.