CVE-2025-22009 - Linux Kernel Dummy Regulator Synchronous Probing Denial of Service Vulnerability

CVE-2025-22009 - Linux Kernel Dummy Regulator Synchronous Probing Denial of Service Vulnerability

https://cvefeed.io/rssfeed/latest.atom / Tue, 04/08/2025 - 14:34
CVE ID : CVE-2025-22009
Published : April 8, 2025, 9:15 a.m. | 2 hours, 57 minutes ago
Description : In the Linux kernel, the following vulnerability has been resolved: regulator: dummy: force synchronous probing Sometimes I get a NULL pointer dereference at boot time in kobject_get() with the following call stack: anatop_regulator_probe() devm_regulator_register() regulator_register() regulator_resolve_supply() kobject_get() By placing some extra BUG_ON() statements I could verify that this is raised because probing of the 'dummy' regulator driver is not completed ('dummy_regulator_rdev' is still NULL). In the JTAG debugger I can see that dummy_regulator_probe() and anatop_regulator_probe() can be run by different kernel threads (kworker/u4:*). I haven't further investigated whether this can be changed or if there are other possibilities to force synchronization between these two probe routines. On the other hand I don't expect much boot time penalty by probing the 'dummy' regulator synchronously.
Severity: 0.0 | NA
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