CVE-2026-80732 ata: pata_sl82c105: fix bridge revision use-after-free
A use-after-free in the Linux kernel pata_sl82c105 driver allows attackers to potentially execute code or cause a system crash.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-80732?
CVE-2026-80732 is a high-severity use after free vulnerability in Linux, published on 3 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:
ata: pata_sl82c105: fix bridge revision use-after-free
pci_get_slot() returns a referenced PCI device. Commit 44c10138fd4b ("PCI: Change all drivers to use pci_device->revision") replaced a configuration-space read with direct access to the cached revision field, but left that access after pci_dev_put(). The bridge may therefore be freed before its revision is read.
Read the revision before dropping the reference.
Which versions are affected by CVE-2026-80732?
How do I fix CVE-2026-80732?
Apply the vendor's patch.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2026-80732 being exploited?
There is no known exploitation of CVE-2026-80732 in the wild and no public exploit code.
Sources
Also known as AZL-99026, BELL-CVE-2026-80732, DEBIAN-CVE-2026-80732, GHSA-p564-mwrx-5m7j, UBUNTU-CVE-2026-80732.