CVE-2024-58034

In the Linux kernel, the following vulnerability has been resolved:

memory: tegra20-emc: fix an OF node reference bug in tegra_emc_find_node_by_ram_code()

As of_find_node_by_name() release the reference of the argument device node, tegra_emc_find_node_by_ram_code() releases some device nodes while still in use, resulting in possible UAFs. According to the bindings and the in-tree DTS files, the "emc-tables" node is always device's child node with the property "nvidia,use-ram-code", and the "lpddr2" node is a child of the "emc-tables" node. Thus utilize the for_each_child_of_node() macro and of_get_child_by_name() instead of of_find_node_by_name() to simplify the code.

This bug was found by an experimental verification tool that I am developing.

[krzysztof: applied v1, adjust the commit msg to incorporate v2 parts]

This vulnerability is rated as Important because, although a use-after-free flaw could allow a local attacker to compromise kernel integrity or escalate privileges, Red Hat Enterprise Linux does not enable or ship the affected NVIDIA Tegra20 External Memory Controller driver. As this hardware-specific driver is not built in Red Hat enterprise kernels, Red Hat supported environments are not affected by this vulnerability.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.