CVE-2026-72432 tpm_crb: Check ACPI_COMPANION() against NULL during probe
A missing NULL check in the Linux kernel TPM CRB driver allows local attackers to trigger a system crash via device matching overrides.
- 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-2026-72432?
CVE-2026-72432 is a vulnerability in Linux, published on 15 Aug 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_crb: Check ACPI_COMPANION() against NULL during probe
Every platform driver can be forced to match a device that doesn't match its list of device IDs because of device_match_driver_override(), so platform drivers that rely on the existence of a device's ACPI companion object need to verify its presence.
Accordingly, add a requisite ACPI_COMPANION() check against NULL to the tpm_crb driver.
Which versions are affected by CVE-2026-72432?
How do I fix CVE-2026-72432?
Apply the vendor's patch.
Is CVE-2026-72432 being exploited?
There is no known exploitation of CVE-2026-72432 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-72432, GHSA-qp72-j2rc-w8mc, UBUNTU-CVE-2026-72432.