CVE-2026-46308 is a vulnerability in Linux Kernel
Published on June 8, 2026
pmdomain: mediatek: fix use-after-free in scpsys_get_bus_protection_legacy()
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.
Products Associated with CVE-2026-46308
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Affected Versions
Linux:- Version c29345fa5f66bea0790cf2219f57b974d4fc177b and below cb27e43c0511e9e1ca8818d231656070b11c18cf is affected.
- Version c29345fa5f66bea0790cf2219f57b974d4fc177b and below 38d8410021b55d226847b2ac8d189d89fe5a8866 is affected.
- Version c29345fa5f66bea0790cf2219f57b974d4fc177b and below ec1fcddb3117d9452210e838fd37389ee61e10e8 is affected.
- Version 6.18 is affected.
- Before 6.18 is unaffected.
- Version 6.18.30, <= 6.18.* is unaffected.
- Version 7.0.7, <= 7.0.* is unaffected.
- Version 7.1-rc3, <= * is unaffected.