CVE-2026-80750 pmdomain: mediatek: fix remaining %pOF after of_node_put()
A use-after-free vulnerability in the Linux kernel's MediaTek power domain driver allows attackers to cause a denial of service or potentially execute code via crafted device tree interactions.
- 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-2026-80750?
CVE-2026-80750 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:
pmdomain: mediatek: fix remaining %pOF after of_node_put()
scpsys_get_bus_protection_legacy() looks up several legacy bus protection regmaps from device-tree nodes.
Two error paths put the device node before checking whether the regmap lookup failed, but still pass that node to dev_err_probe() with %pOF on failure. If of_node_put() drops the last reference, the later %pOF formatting can dereference a freed device node.
Keep the node reference until after the error message has been emitted in the infracfg and SMI lookup paths. Also drop the SMI node before returning when the SMI phandle is missing.
Which versions are affected by CVE-2026-80750?
How do I fix CVE-2026-80750?
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-2026-80750 being exploited?
There is no known exploitation of CVE-2026-80750 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-80750, DEBIAN-CVE-2026-80750, GHSA-r977-99pr-5gm5, UBUNTU-CVE-2026-80750.