CVE-2026-46288

Summary

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

of: unittest: fix use-after-free in of_unittest_changeset()

The variable 'parent' is assigned the value of 'nchangeset' earlier in the function, meaning both point to the same struct device_node. The call to of_node_put(nchangeset) can decrement the reference count to zero and free the node if there are no other holders. After that, the code still uses 'parent' to check for the presence of a property and to read a string property, leading to a use-after-free.

Fix this by moving the of_node_put() call after the last access to 'parent', avoiding the UAF.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux1c668ea65506e67ce2eae07b69bb09fcdd86e309 < 37318d1a27c9cc5a70d3cd7e49e30ec86f2b8ca1affected
LinuxLinux1c668ea65506e67ce2eae07b69bb09fcdd86e309 < 7f0f0926f3010b10cff5e93446258f971e42f2fdaffected
LinuxLinux1c668ea65506e67ce2eae07b69bb09fcdd86e309 < 6fdad20b7975bdc32e85b45f8f7c640f6687b81faffected
LinuxLinux1c668ea65506e67ce2eae07b69bb09fcdd86e309 < faecdd423c27f0d6090156a435ba9dbbac0eaddbaffected
LinuxLinux6.12affected
LinuxLinux0 < 6.12unaffected
LinuxLinux6.12.86 <= 6.12.*unaffected
LinuxLinux6.18.27 <= 6.18.*unaffected
LinuxLinux7.0.4 <= 7.0.*unaffected
LinuxLinux7.1 <= *unaffected

Weaknesses

References