Vulnerability-Lookup

FKIE_CVE-2026-80727

Vulnerability from fkie_nvd - Published: 2026-09-03 13:06 - Updated: 2026-09-03 13:06

Severity

Summary

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: 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 A second splat follows right after, from timer_setup() finding that same timer already queued: ODEBUG: init active (active state 0) object: (____ptrval____) object type: timer_list hint: stub_timer+0x0/0x10 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. [ bp: Massage commit message. ]

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/17ab68d0cf6a41bff61b1e13c6141d9e463736ae
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/4f4cba3947d2f0eceb32727e198ca2c149a653a9
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/a213dfaa2596c1c0dc4dae91c14fbfa499c03223
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/e708fc1566ebd4a2d3f2546e6310d64d362db80d

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "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   \u003cTASK\u003e\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"
}

CVE-2026-80727 (GCVE-0-2026-80727)

Vulnerability from cvelistv5 – Published: 2026-09-03 08:21 – Updated: 2026-09-03 08:21

Title

x86/mce: Set up the polling timer before CMCI discovery

Summary

Severity

No CVSS data available.

Assigner

Linux mitre root

References

4 references

URL	Tags
https://git.kernel.org/stable/c/17ab68d0cf6a41bff…
https://git.kernel.org/stable/c/e708fc1566ebd4a2d…
https://git.kernel.org/stable/c/4f4cba3947d2f0ece…
https://git.kernel.org/stable/c/a213dfaa2596c1c0d…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 1f68ce2a027250aeeb1756391110cdc4dc97c797 , < 17ab68d0cf6a41bff61b1e13c6141d9e463736ae (git) Affected: 1f68ce2a027250aeeb1756391110cdc4dc97c797 , < e708fc1566ebd4a2d3f2546e6310d64d362db80d (git) Affected: 1f68ce2a027250aeeb1756391110cdc4dc97c797 , < 4f4cba3947d2f0eceb32727e198ca2c149a653a9 (git) Affected: 1f68ce2a027250aeeb1756391110cdc4dc97c797 , < a213dfaa2596c1c0dc4dae91c14fbfa499c03223 (git)
Linux	Linux	Affected: 6.8 Unaffected: 0 , < 6.8 (semver) Unaffected: 6.12.105 , ≤ 6.12.* (semver) Unaffected: 6.18.45 , ≤ 6.18.* (semver) Unaffected: 7.1.9 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "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   \u003cTASK\u003e\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"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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FKIE_CVE-2026-80727

CVE-2026-80727 (GCVE-0-2026-80727)

Tags

Sightings

Nomenclature

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