{"id":"AZL-59859","summary":"CVE-2025-22009 affecting package kernel for versions less than 6.6.85.1-2","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nregulator: dummy: force synchronous probing\n\nSometimes I get a NULL pointer dereference at boot time in kobject_get()\nwith the following call stack:\n\nanatop_regulator_probe()\n devm_regulator_register()\n  regulator_register()\n   regulator_resolve_supply()\n    kobject_get()\n\nBy placing some extra BUG_ON() statements I could verify that this is\nraised because probing of the 'dummy' regulator driver is not completed\n('dummy_regulator_rdev' is still NULL).\n\nIn the JTAG debugger I can see that dummy_regulator_probe() and\nanatop_regulator_probe() can be run by different kernel threads\n(kworker/u4:*).  I haven't further investigated whether this can be\nchanged or if there are other possibilities to force synchronization\nbetween these two probe routines.  On the other hand I don't expect much\nboot time penalty by probing the 'dummy' regulator synchronously.","modified":"2026-04-01T05:19:33.164223Z","published":"2025-04-08T09:15:24Z","upstream":["CVE-2025-22009"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-22009"}],"affected":[{"package":{"name":"kernel","ecosystem":"Azure Linux:3","purl":"pkg:rpm/azure-linux/kernel"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.6.85.1-2"}]}],"database_specific":{"source":"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-59859.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}