CVE-2026-80930 tpm: tpm_i2c_nuvoton: disable IRQ on wait timeout
A missing IRQ disable in the Linux kernel TPM driver can cause resource leaks and denial of service when wait operations time out.
- 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-2026-80930?
CVE-2026-80930 is a denial of service vulnerability in Linux, published on 11 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:
tpm: tpm_i2c_nuvoton: disable IRQ on wait timeout
i2c_nuvoton_wait_for_stat() enables the IRQ before waiting for the interrupt handler to report a status change. If the wait times out, or is interrupted before the handler runs, the function returns without balancing the enable_irq() call.
Disable the IRQ before leaving the failed wait path. Also preserve an interrupted wait's original error code instead of converting it to -ETIMEDOUT inside the helper.
Which versions are affected by CVE-2026-80930?
How do I fix CVE-2026-80930?
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-2026-80930 being exploited?
There is no known exploitation of CVE-2026-80930 in the wild and no public exploit code.
Sources
Also known as AZL-100532, BELL-CVE-2026-80930, DEBIAN-CVE-2026-80930, GHSA-6qqr-xmx9-c73w, UBUNTU-CVE-2026-80930.