CVE-2026-80822 mailbox: mchp-ipc-sbi: Add null check for devm_kasprintf()
A missing null check in the Microchip IPC SBI mailbox driver can cause a kernel crash if memory allocation fails, leading to denial of service.
- 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-2026-80822?
CVE-2026-80822 is a 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:
mailbox: mchp-ipc-sbi: Add null check for devm_kasprintf()
Add a check to see if devm_kasprintf() is not NULL in mchp_ipc_get_cluster_aggr_irq(), returning -ENOMEM if the function failed.
Which versions are affected by CVE-2026-80822?
How do I fix CVE-2026-80822?
Apply the vendor's patch.
Is CVE-2026-80822 being exploited?
There is no known exploitation of CVE-2026-80822 in the wild and no public exploit code.
Sources
Also known as AZL-99686, BELL-CVE-2026-80822, DEBIAN-CVE-2026-80822, GHSA-ccq8-8x93-6cmr, UBUNTU-CVE-2026-80822.