CVE-2026-80727
Estado: RecibidaSin puntuar—
In the Linux kernel, the following vulnerability has been resolved:
x86/mce: Set up the polling timer before CMCI discovery
I hit the following on one of my machines:
A second splat follows right after, from timer_setup() finding that same timer already queued:
This is happening because CMCI storm detection is trying to modify the timer before latter was properly set up.
Set up the timer first. __mcheck_cpu_setup_timer() only calls timer_setup(), and depends on neither the generic nor the vendor init.
Detalles técnicos trazas, registros y código del informe original
mce: CPU0 BANK15 CMCI inherited storm ------------[ cut here ]------------ ODEBUG: assert_init not available (active state 0) object: (____ptrval____) object type: timer_list hint: 0x0 WARNING: lib/debugobjects.c:632 at debug_object_assert_init+0x178/0x230, CPU#0: swapper/0/0 CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 7.2.0-rc5 #3 PREEMPTLAZY RIP: 0010:debug_object_assert_init+0x18f/0x230 Call Trace: <TASK> __mod_timer mce_timer_kick cmci_discover intel_init_cmci mce_intel_feature_init mcheck_cpu_init identify_cpu identify_boot_cpu arch_cpu_finalize_init start_kernel ODEBUG: init active (active state 0) object: (____ptrval____) object type: timer_list hint: stub_timer+0x0/0x10 [ bp: Massage commit message. ]
CVSS
NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.21%
- Percentil entre todas las CVEs puntuadas: 10
- Fecha de la puntuación: 5/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (1)
⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.
Referencias
JSON original (NVD)
Mostrar
{
"id": "CVE-2026-80727",
"cveTags": [],
"metrics": {},
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "1f68ce2a027250aeeb1756391110cdc4dc97c797",
"lessThan": "17ab68d0cf6a41bff61b1e13c6141d9e463736ae",
"versionType": "git"
},
{
"status": "affected",
"version": "1f68ce2a027250aeeb1756391110cdc4dc97c797",
"lessThan": "e708fc1566ebd4a2d3f2546e6310d64d362db80d",
"versionType": "git"
},
{
"status": "affected",
"version": "1f68ce2a027250aeeb1756391110cdc4dc97c797",
"lessThan": "4f4cba3947d2f0eceb32727e198ca2c149a653a9",
"versionType": "git"
},
{
"status": "affected",
"version": "1f68ce2a027250aeeb1756391110cdc4dc97c797",
"lessThan": "a213dfaa2596c1c0dc4dae91c14fbfa499c03223",
"versionType": "git"
}
],
"programFiles": [
"arch/x86/kernel/cpu/mce/core.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.8"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.8",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.12.105",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.45",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.9",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"arch/x86/kernel/cpu/mce/core.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2026-09-03T13:06:11.173",
"references": [
{
"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",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Received",
"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. ]"
}
],
"lastModified": "2026-09-03T13:06:11.173",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}