{"id":"CVE-2026-53326","summary":"debugobjects: Don't call fill_pool() in early boot hardirq context","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ndebugobjects: Don't call fill_pool() in early boot hardirq context\n\nWhen booting a debug PREEMPT_RT kernel on an ARM64 system, a \"inconsistent\n{HARDIRQ-ON-W} -\u003e {IN-HARDIRQ-W} usage\" lockdep warning message was\nreported to the console.\n\nDuring early boot, interrupts are enabled before the scheduler is\nenabled. In this window (before SYSTEM_SCHEDULING is set) interrupts can\nfire and in the hard interrupt context handler attempt to fill the pool\n\nThis can lead to a deadlock when the interrupt occurred when the interrupt\nhits a region which holds a lock that is required to be taken in the\nallocation path.\n\nAdd a new can_fill_pool() helper and reorder the exception rule and forbid\nthis scenario by excluding allocations from hard interrupt context.","modified":"2026-07-08T08:13:45.224433050Z","published":"2026-07-01T13:32:12.924Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53326.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/0d046ae106255cba5eb83b23f78ee93f3620247d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/27335c50014102e9077b784ebd314954286afcab"},{"type":"WEB","url":"https://git.kernel.org/stable/c/3cc90ea0dd0fb1f8db577dcdc027fc46c06049f6"},{"type":"WEB","url":"https://git.kernel.org/stable/c/44b8b03a9fb5c575548fc72c674653d6baba142a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/5d95f6b267f3d7fe54f42a3b224bb4a3d3990b41"},{"type":"WEB","url":"https://git.kernel.org/stable/c/7bc71bdb1c1526c7f02a6adab324394ff1327b0a"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53326.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-53326"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"13abb2b11ac3b6cb89822f152e770081893e4bc3"},{"fixed":"3cc90ea0dd0fb1f8db577dcdc027fc46c06049f6"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"0d2a64411b0974a469ff56e62441055147e5a194"},{"fixed":"5d95f6b267f3d7fe54f42a3b224bb4a3d3990b41"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"c93859a52b0d6953cdaa17fd7fb46a6871b015cf"},{"fixed":"27335c50014102e9077b784ebd314954286afcab"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"a460935022f512e167b4c5d4c12d85f89ba6aabd"},{"fixed":"44b8b03a9fb5c575548fc72c674653d6baba142a"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"06e0ae988f6e3499785c407429953ade19c1096b"},{"fixed":"7bc71bdb1c1526c7f02a6adab324394ff1327b0a"},{"fixed":"0d046ae106255cba5eb83b23f78ee93f3620247d"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-53326.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.0.13"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-53326.json"}}],"schema_version":"1.7.5"}