CVE-2026-80727

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-80727", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-26T14:34:25.789Z", "datePublished": "2026-09-03T08:21:46.523Z", "dateUpdated": "2026-09-03T08:21:46.523Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-09-03T08:21:46.523Z"}, "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. ]"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/x86/kernel/cpu/mce/core.c"], "versions": [{"version": "1f68ce2a027250aeeb1756391110cdc4dc97c797", "lessThan": "17ab68d0cf6a41bff61b1e13c6141d9e463736ae", "status": "affected", "versionType": "git"}, {"version": "1f68ce2a027250aeeb1756391110cdc4dc97c797", "lessThan": "e708fc1566ebd4a2d3f2546e6310d64d362db80d", "status": "affected", "versionType": "git"}, {"version": "1f68ce2a027250aeeb1756391110cdc4dc97c797", "lessThan": "4f4cba3947d2f0eceb32727e198ca2c149a653a9", "status": "affected", "versionType": "git"}, {"version": "1f68ce2a027250aeeb1756391110cdc4dc97c797", "lessThan": "a213dfaa2596c1c0dc4dae91c14fbfa499c03223", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/x86/kernel/cpu/mce/core.c"], "versions": [{"version": "6.8", "status": "affected"}, {"version": "0", "lessThan": "6.8", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.105", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.45", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.9", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.8", "versionEndExcluding": "6.12.105"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.8", "versionEndExcluding": "6.18.45"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.8", "versionEndExcluding": "7.1.9"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.8", "versionEndExcluding": "7.2"}]}]}], "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"}}}}

{}

{"affected": [{"affectedData": [{"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"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "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. ]"}], "id": "CVE-2026-80727", "lastModified": "2026-09-03T13:06:11.173", "metrics": {}, "published": "2026-09-03T13:06:11.173", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/17ab68d0cf6a41bff61b1e13c6141d9e463736ae"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4f4cba3947d2f0eceb32727e198ca2c149a653a9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a213dfaa2596c1c0dc4dae91c14fbfa499c03223"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e708fc1566ebd4a2d3f2546e6310d64d362db80d"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1f68ce2a027250aeeb1756391110cdc4dc97c797,17ab68d0cf6a41bff61b1e13c6141d9e463736ae)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1f68ce2a027250aeeb1756391110cdc4dc97c797,e708fc1566ebd4a2d3f2546e6310d64d362db80d)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1f68ce2a027250aeeb1756391110cdc4dc97c797,4f4cba3947d2f0eceb32727e198ca2c149a653a9)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1f68ce2a027250aeeb1756391110cdc4dc97c797,a213dfaa2596c1c0dc4dae91c14fbfa499c03223)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "6.8"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.8)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.105,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.45,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.9,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2,*)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-09-03T12:30:03.814814+00:00", "updated": "2026-09-03T12:30:04.250009+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}