{"cve":"CVE-2026-80727","nvd":{"published":"2026-09-03T13:06:11.173","modified":"2026-09-03T13:06:11.173","status":"Received","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. ]","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["https://git.kernel.org/stable/c/17ab68d0cf6a41bff61b1e13c6141d9e463736ae","https://git.kernel.org/stable/c/4f4cba3947d2f0eceb32727e198ca2c149a653a9","https://git.kernel.org/stable/c/a213dfaa2596c1c0dc4dae91c14fbfa499c03223","https://git.kernel.org/stable/c/e708fc1566ebd4a2d3f2546e6310d64d362db80d"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:50:50.842544443+00:00"},"epss":{"cve":"CVE-2026-80727","score":0.00168,"percentile":0.06045,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}