{"api_version":"1","generated_at":"2026-09-06T09:36:01+00:00","cve":"CVE-2026-80727","urls":{"html":"https://cve.report/CVE-2026-80727","api":"https://cve.report/api/cve/CVE-2026-80727.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-80727","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-80727"},"summary":{"title":"x86/mce: Set up the polling timer before CMCI discovery","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nx86/mce: Set up the polling timer before CMCI discovery\n\nI hit the following on one of my machines:\n\n  mce: CPU0 BANK15 CMCI inherited storm\n  ------------[ cut here ]------------\n  ODEBUG: assert_init not available (active state 0) object: (____ptrval____) object type: timer_list hint: 0x0\n  WARNING: lib/debugobjects.c:632 at debug_object_assert_init+0x178/0x230, CPU#0: swapper/0/0\n  CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 7.2.0-rc5 #3 PREEMPTLAZY\n  RIP: 0010:debug_object_assert_init+0x18f/0x230\n  Call Trace:\n   <TASK>\n   __mod_timer\n   mce_timer_kick\n   cmci_discover\n   intel_init_cmci\n   mce_intel_feature_init\n   mcheck_cpu_init\n   identify_cpu\n   identify_boot_cpu\n   arch_cpu_finalize_init\n   start_kernel\n\nA second splat follows right after, from timer_setup() finding that same\ntimer already queued:\n\n  ODEBUG: init active (active state 0) object: (____ptrval____) object type: timer_list hint: stub_timer+0x0/0x10\n\nThis is happening because CMCI storm detection is trying to modify the timer\nbefore latter was properly set up.\n\nSet up the timer first. __mcheck_cpu_setup_timer() only calls timer_setup(),\nand depends on neither the generic nor the vendor init.\n\n  [ bp: Massage commit message. ]","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-03 13:06:11","updated_at":"2026-09-03 13:06:11"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/e708fc1566ebd4a2d3f2546e6310d64d362db80d","name":"https://git.kernel.org/stable/c/e708fc1566ebd4a2d3f2546e6310d64d362db80d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/17ab68d0cf6a41bff61b1e13c6141d9e463736ae","name":"https://git.kernel.org/stable/c/17ab68d0cf6a41bff61b1e13c6141d9e463736ae","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/4f4cba3947d2f0eceb32727e198ca2c149a653a9","name":"https://git.kernel.org/stable/c/4f4cba3947d2f0eceb32727e198ca2c149a653a9","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/a213dfaa2596c1c0dc4dae91c14fbfa499c03223","name":"https://git.kernel.org/stable/c/a213dfaa2596c1c0dc4dae91c14fbfa499c03223","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-80727","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80727","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1f68ce2a027250aeeb1756391110cdc4dc97c797 17ab68d0cf6a41bff61b1e13c6141d9e463736ae git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1f68ce2a027250aeeb1756391110cdc4dc97c797 e708fc1566ebd4a2d3f2546e6310d64d362db80d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1f68ce2a027250aeeb1756391110cdc4dc97c797 4f4cba3947d2f0eceb32727e198ca2c149a653a9 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1f68ce2a027250aeeb1756391110cdc4dc97c797 a213dfaa2596c1c0dc4dae91c14fbfa499c03223 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.8","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.8 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.105 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.45 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.9 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"80727","cve":"CVE-2026-80727","epss":"0.002000000","percentile":"0.098430000","score_date":"2026-09-05","updated_at":"2026-09-06 00:04:17"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["arch/x86/kernel/cpu/mce/core.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"17ab68d0cf6a41bff61b1e13c6141d9e463736ae","status":"affected","version":"1f68ce2a027250aeeb1756391110cdc4dc97c797","versionType":"git"},{"lessThan":"e708fc1566ebd4a2d3f2546e6310d64d362db80d","status":"affected","version":"1f68ce2a027250aeeb1756391110cdc4dc97c797","versionType":"git"},{"lessThan":"4f4cba3947d2f0eceb32727e198ca2c149a653a9","status":"affected","version":"1f68ce2a027250aeeb1756391110cdc4dc97c797","versionType":"git"},{"lessThan":"a213dfaa2596c1c0dc4dae91c14fbfa499c03223","status":"affected","version":"1f68ce2a027250aeeb1756391110cdc4dc97c797","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["arch/x86/kernel/cpu/mce/core.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.8"},{"lessThan":"6.8","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.105","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.45","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.9","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.105","versionStartIncluding":"6.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.45","versionStartIncluding":"6.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.9","versionStartIncluding":"6.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2","versionStartIncluding":"6.8","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nx86/mce: Set up the polling timer before CMCI discovery\n\nI hit the following on one of my machines:\n\n  mce: CPU0 BANK15 CMCI inherited storm\n  ------------[ cut here ]------------\n  ODEBUG: assert_init not available (active state 0) object: (____ptrval____) object type: timer_list hint: 0x0\n  WARNING: lib/debugobjects.c:632 at debug_object_assert_init+0x178/0x230, CPU#0: swapper/0/0\n  CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 7.2.0-rc5 #3 PREEMPTLAZY\n  RIP: 0010:debug_object_assert_init+0x18f/0x230\n  Call Trace:\n   <TASK>\n   __mod_timer\n   mce_timer_kick\n   cmci_discover\n   intel_init_cmci\n   mce_intel_feature_init\n   mcheck_cpu_init\n   identify_cpu\n   identify_boot_cpu\n   arch_cpu_finalize_init\n   start_kernel\n\nA second splat follows right after, from timer_setup() finding that same\ntimer already queued:\n\n  ODEBUG: init active (active state 0) object: (____ptrval____) object type: timer_list hint: stub_timer+0x0/0x10\n\nThis is happening because CMCI storm detection is trying to modify the timer\nbefore latter was properly set up.\n\nSet up the timer first. __mcheck_cpu_setup_timer() only calls timer_setup(),\nand depends on neither the generic nor the vendor init.\n\n  [ bp: Massage commit message. ]"}],"providerMetadata":{"dateUpdated":"2026-09-03T08:21:46.523Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/17ab68d0cf6a41bff61b1e13c6141d9e463736ae"},{"url":"https://git.kernel.org/stable/c/e708fc1566ebd4a2d3f2546e6310d64d362db80d"},{"url":"https://git.kernel.org/stable/c/4f4cba3947d2f0eceb32727e198ca2c149a653a9"},{"url":"https://git.kernel.org/stable/c/a213dfaa2596c1c0dc4dae91c14fbfa499c03223"}],"title":"x86/mce: Set up the polling timer before CMCI discovery","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-80727","datePublished":"2026-09-03T08:21:46.523Z","dateReserved":"2026-08-26T14:34:25.789Z","dateUpdated":"2026-09-03T08:21:46.523Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-03 13:06:11","lastModifiedDate":"2026-09-03 13:06:11","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"80727","Ordinal":"1","Title":"x86/mce: Set up the polling timer before CMCI discovery","CVE":"CVE-2026-80727","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"80727","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nx86/mce: Set up the polling timer before CMCI discovery\n\nI hit the following on one of my machines:\n\n  mce: CPU0 BANK15 CMCI inherited storm\n  ------------[ cut here ]------------\n  ODEBUG: assert_init not available (active state 0) object: (____ptrval____) object type: timer_list hint: 0x0\n  WARNING: lib/debugobjects.c:632 at debug_object_assert_init+0x178/0x230, CPU#0: swapper/0/0\n  CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 7.2.0-rc5 #3 PREEMPTLAZY\n  RIP: 0010:debug_object_assert_init+0x18f/0x230\n  Call Trace:\n   <TASK>\n   __mod_timer\n   mce_timer_kick\n   cmci_discover\n   intel_init_cmci\n   mce_intel_feature_init\n   mcheck_cpu_init\n   identify_cpu\n   identify_boot_cpu\n   arch_cpu_finalize_init\n   start_kernel\n\nA second splat follows right after, from timer_setup() finding that same\ntimer already queued:\n\n  ODEBUG: init active (active state 0) object: (____ptrval____) object type: timer_list hint: stub_timer+0x0/0x10\n\nThis is happening because CMCI storm detection is trying to modify the timer\nbefore latter was properly set up.\n\nSet up the timer first. __mcheck_cpu_setup_timer() only calls timer_setup(),\nand depends on neither the generic nor the vendor init.\n\n  [ bp: Massage commit message. ]","Type":"Description","Title":"x86/mce: Set up the polling timer before CMCI discovery"}]}}}