CVE-2026-46308 pmdomain: mediatek: fix use-after-free in scpsys_get_bus_protection_legacy()
A use-after-free in the Linux kernel's MediaTek power domain driver allows attackers to potentially execute code or escalate privileges via crafted device tree properties.
- 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-2026-46308?
CVE-2026-46308 is a high-severity use after free vulnerability in Linux kernel, published on 8 Jun 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 use-after-free in scpsys_get_bus_protection_legacy()
In scpsys_get_bus_protection_legacy(), of_find_node_with_property() returns a device node with its reference count incremented. The function then calls of_node_put(node) before checking whether syscon_regmap_lookup_by_phandle() returns an error. If an error occurs, dev_err_probe() dereferences the node pointer to print diagnostic information, but the node memory may have already been freed due to the earlier of_node_put(), leading to a use-after-free vulnerability.
Fix this by moving the of_node_put() call after the error check, ensuring the node is still valid when accessed in the error path.
Weakness: CWE-416
Which versions are affected by CVE-2026-46308?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-46308?
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-2026-46308 being exploited?
There is no known exploitation of CVE-2026-46308 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2026-46308, DEBIAN-CVE-2026-46308, GHSA-rpc3-vj77-cxwg, UBUNTU-CVE-2026-46308.