Vulnerability-Lookup

GHSA-FF23-GXR2-XXHQ

Vulnerability from github – Published: 2026-08-15 06:32 – Updated: 2026-08-17 06:33

Details

In the Linux kernel, the following vulnerability has been resolved:

cpu: hotplug: Preserve per instance callback errors

cpuhp_invoke_callback() unwinds earlier callbacks for the same hotplug state when one instance fails. The rollback path currently reuses ret, so a successful rollback can hide the original error and make the failed transition look successful.

Keep the rollback result separate from the original error.

Severity

7.8 (High)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2026-72067"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-15T06:21:16Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ncpu: hotplug: Preserve per instance callback errors\n\ncpuhp_invoke_callback() unwinds earlier callbacks for the same\nhotplug state when one instance fails. The rollback path currently\nreuses ret, so a successful rollback can hide the original error and\nmake the failed transition look successful.\n\nKeep the rollback result separate from the original error.",
  "id": "GHSA-ff23-gxr2-xxhq",
  "modified": "2026-08-17T06:33:07Z",
  "published": "2026-08-15T06:32:11Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-72067"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/673db10729fb121ea1b16fe57791a0cb9eac1eb5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/77d4fa8a3ea1c3e8b996ac35e59aee9e77389905"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7a68257b90d8a9b6d605abc99469ded45ecba63b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/95232281512b15338549171ed9a2acf21f946ffb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9f7dc355f62c011e4afe8286cf71130d4bfb9d80"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ef39758637cc5b603fb05b625c45a98aa306e338"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f77117530fc3f5932ffb107182a6dd34006be9b6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fe9c8d641f6991614d1229a3ffd3e33b879bba9c"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-72067 (GCVE-0-2026-72067)

Vulnerability from cvelistv5 – Published: 2026-08-15 05:52 – Updated: 2026-08-17 05:39

Title

cpu: hotplug: Preserve per instance callback errors

Summary

In the Linux kernel, the following vulnerability has been resolved: cpu: hotplug: Preserve per instance callback errors cpuhp_invoke_callback() unwinds earlier callbacks for the same hotplug state when one instance fails. The rollback path currently reuses ret, so a successful rollback can hide the original error and make the failed transition look successful. Keep the rollback result separate from the original error.

Severity

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Assigner

Linux mitre root

References

8 references

URL	Tags
https://git.kernel.org/stable/c/fe9c8d641f6991614…
https://git.kernel.org/stable/c/ef39758637cc5b603…
https://git.kernel.org/stable/c/95232281512b15338…
https://git.kernel.org/stable/c/7a68257b90d8a9b6d…
https://git.kernel.org/stable/c/77d4fa8a3ea1c3e8b…
https://git.kernel.org/stable/c/f77117530fc3f5932…
https://git.kernel.org/stable/c/9f7dc355f62c011e4…
https://git.kernel.org/stable/c/673db10729fb121ea…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 724a86881d03ee5794148e65142e24ed3621be66 , < fe9c8d641f6991614d1229a3ffd3e33b879bba9c (git) Affected: 724a86881d03ee5794148e65142e24ed3621be66 , < ef39758637cc5b603fb05b625c45a98aa306e338 (git) Affected: 724a86881d03ee5794148e65142e24ed3621be66 , < 95232281512b15338549171ed9a2acf21f946ffb (git) Affected: 724a86881d03ee5794148e65142e24ed3621be66 , < 7a68257b90d8a9b6d605abc99469ded45ecba63b (git) Affected: 724a86881d03ee5794148e65142e24ed3621be66 , < 77d4fa8a3ea1c3e8b996ac35e59aee9e77389905 (git) Affected: 724a86881d03ee5794148e65142e24ed3621be66 , < f77117530fc3f5932ffb107182a6dd34006be9b6 (git) Affected: 724a86881d03ee5794148e65142e24ed3621be66 , < 9f7dc355f62c011e4afe8286cf71130d4bfb9d80 (git) Affected: 724a86881d03ee5794148e65142e24ed3621be66 , < 673db10729fb121ea1b16fe57791a0cb9eac1eb5 (git)
Linux	Linux	Affected: 4.14 Unaffected: 0 , < 4.14 (semver) Unaffected: 5.10.261 , ≤ 5.10.* (semver) Unaffected: 5.15.212 , ≤ 5.15.* (semver) Unaffected: 6.1.178 , ≤ 6.1.* (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.97 , ≤ 6.12.* (semver) Unaffected: 6.18.40 , ≤ 6.18.* (semver) Unaffected: 7.1.5 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "kernel/cpu.c"
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          "vendor": "Linux",
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              "status": "unaffected",
              "version": "0",
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              "status": "unaffected",
              "version": "5.15.212",
              "versionType": "semver"
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            {
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              "status": "unaffected",
              "version": "6.1.178",
              "versionType": "semver"
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              "versionType": "semver"
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              "status": "unaffected",
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              "status": "unaffected",
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              "versionType": "semver"
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              "versionType": "original_commit_for_fix"
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      "cpeApplicability": [
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncpu: hotplug: Preserve per instance callback errors\n\ncpuhp_invoke_callback() unwinds earlier callbacks for the same\nhotplug state when one instance fails. The rollback path currently\nreuses ret, so a successful rollback can hide the original error and\nmake the failed transition look successful.\n\nKeep the rollback result separate from the original error."
        }
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      "metrics": [
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            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
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              "value": "AV:L - The bug is in cpuhp_invoke_callback() during CPU hotplug state transitions, reached only via local kernel paths such as sysfs /sys/devices/system/cpu/cpuN/online, device_online/offline, and cpu_up()/cpu_down() from privileged local callers.\nAC:L - An attacker can reliably trigger the bug by inducing multi-instance callback failure (e.g., -ENOMEM via memory pressure) during CPU online/offline on cloud autoscaled nodes or servers running RAID/padata where rollback callbacks succeed and overwrite the original error.\nPR:L - CPU hotplug is normally admin-initiated, but an unprivileged local user can force multi-instance callback failures through memory exhaustion during system/hypervisor CPU hotplug without needing CAP_SYS_ADMIN or user-namespace admin capabilities.\nUI:N - Exploitation requires no victim interaction beyond normal system operation; it is triggered during kernel CPU hotplug transitions without the user opening files, mounting filesystems, or performing other deliberate actions.\nS:U - The vulnerability corrupts kernel CPU hotplug state-machine consistency and affects kernel subsystems on the same host; it does not cross a VM, container, or IOMMU security boundary to impact a separate authority.\nC:H - Silently completing hotplug after a failed multi-instance rollback leaves subsystems like padata and RAID5 in a state inconsistent with the hotplug machine, which can desynchronize RCU-protected structures and enable kernel memory disclosure primitives.\nI:H - When rollback overwrites the original error with success, cpuhp_up_callbacks()/cpuhp_down_callbacks() proceed and mark the CPU transition complete while multi-instance subsystem callbacks were only partially applied, corrupting kernel integrity and enabling further memory corruption.\nA:H - Proceeding past a failed multi-instance hotplug step while subsystems such as padata, RAID5, or virtio-net instances are left in an inconsistent partially-rolled-back state can cause kernel oops, panic, or hang on production cloud and server systems."
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        "dateUpdated": "2026-08-17T05:39:59.754Z",
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        },
        {
          "url": "https://git.kernel.org/stable/c/673db10729fb121ea1b16fe57791a0cb9eac1eb5"
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    "cveId": "CVE-2026-72067",
    "datePublished": "2026-08-15T05:52:20.268Z",
    "dateReserved": "2026-08-09T03:40:39.903Z",
    "dateUpdated": "2026-08-17T05:39:59.754Z",
    "state": "PUBLISHED"
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  "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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GHSA-FF23-GXR2-XXHQ

CVE-2026-72067 (GCVE-0-2026-72067)

Tags

Sightings

Nomenclature