{"id":"CVE-2026-53326","state":"PUBLISHED","title":"debugobjects: Don't call fill_pool() in early boot hardirq context","description":"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} -> {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.","publishedAt":"2026-07-01T13:32:12.924Z","updatedAt":"2026-07-04T11:51:04.894Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"13abb2b11ac3b6cb89822f152e770081893e4bc3","status":"affected","lessThan":"3cc90ea0dd0fb1f8db577dcdc027fc46c06049f6","versionType":"git"},{"version":"0d2a64411b0974a469ff56e62441055147e5a194","status":"affected","lessThan":"5d95f6b267f3d7fe54f42a3b224bb4a3d3990b41","versionType":"git"},{"version":"c93859a52b0d6953cdaa17fd7fb46a6871b015cf","status":"affected","lessThan":"27335c50014102e9077b784ebd314954286afcab","versionType":"git"},{"version":"a460935022f512e167b4c5d4c12d85f89ba6aabd","status":"affected","lessThan":"44b8b03a9fb5c575548fc72c674653d6baba142a","versionType":"git"},{"version":"06e0ae988f6e3499785c407429953ade19c1096b","status":"affected","lessThan":"7bc71bdb1c1526c7f02a6adab324394ff1327b0a","versionType":"git"},{"version":"06e0ae988f6e3499785c407429953ade19c1096b","status":"affected","lessThan":"0d046ae106255cba5eb83b23f78ee93f3620247d","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["lib/debugobjects.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.19","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.19","versionType":"semver"},{"version":"7.0.13","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["lib/debugobjects.c"]}],"references":["https://git.kernel.org/stable/c/3cc90ea0dd0fb1f8db577dcdc027fc46c06049f6","https://git.kernel.org/stable/c/5d95f6b267f3d7fe54f42a3b224bb4a3d3990b41","https://git.kernel.org/stable/c/27335c50014102e9077b784ebd314954286afcab","https://git.kernel.org/stable/c/44b8b03a9fb5c575548fc72c674653d6baba142a","https://git.kernel.org/stable/c/7bc71bdb1c1526c7f02a6adab324394ff1327b0a","https://git.kernel.org/stable/c/0d046ae106255cba5eb83b23f78ee93f3620247d"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:16.098Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/53xxx/CVE-2026-53326.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-53326","state":"PUBLISHED","datePublished":"2026-07-01T13:32:12.924Z","dateUpdated":"2026-07-04T11:51:04.894Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-06-09T07:44:35.398Z"},"containers":{"cna":{"title":"debugobjects: Don't call fill_pool() in early boot hardirq context","descriptions":[{"lang":"en","value":"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} -> {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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"13abb2b11ac3b6cb89822f152e770081893e4bc3","status":"affected","lessThan":"3cc90ea0dd0fb1f8db577dcdc027fc46c06049f6","versionType":"git"},{"version":"0d2a64411b0974a469ff56e62441055147e5a194","status":"affected","lessThan":"5d95f6b267f3d7fe54f42a3b224bb4a3d3990b41","versionType":"git"},{"version":"c93859a52b0d6953cdaa17fd7fb46a6871b015cf","status":"affected","lessThan":"27335c50014102e9077b784ebd314954286afcab","versionType":"git"},{"version":"a460935022f512e167b4c5d4c12d85f89ba6aabd","status":"affected","lessThan":"44b8b03a9fb5c575548fc72c674653d6baba142a","versionType":"git"},{"version":"06e0ae988f6e3499785c407429953ade19c1096b","status":"affected","lessThan":"7bc71bdb1c1526c7f02a6adab324394ff1327b0a","versionType":"git"},{"version":"06e0ae988f6e3499785c407429953ade19c1096b","status":"affected","lessThan":"0d046ae106255cba5eb83b23f78ee93f3620247d","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["lib/debugobjects.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.19","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.19","versionType":"semver"},{"version":"7.0.13","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["lib/debugobjects.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/3cc90ea0dd0fb1f8db577dcdc027fc46c06049f6"},{"url":"https://git.kernel.org/stable/c/5d95f6b267f3d7fe54f42a3b224bb4a3d3990b41"},{"url":"https://git.kernel.org/stable/c/27335c50014102e9077b784ebd314954286afcab"},{"url":"https://git.kernel.org/stable/c/44b8b03a9fb5c575548fc72c674653d6baba142a"},{"url":"https://git.kernel.org/stable/c/7bc71bdb1c1526c7f02a6adab324394ff1327b0a"},{"url":"https://git.kernel.org/stable/c/0d046ae106255cba5eb83b23f78ee93f3620247d"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-07-04T11:51:04.894Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.19","versionEndExcluding":"7.0.13"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.19","versionEndExcluding":"7.1"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}