CVE-2026-68092 (GCVE-0-2026-68092)
Vulnerability from cvelistv5
Published
2026-08-10 11:51
Modified
2026-08-17 04:58
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: time/jiffies: Register jiffies clocksource before usage Teddy reported that a XEN HVM has a long boot delay, which was bisected to the recent enhancements to the negative motion detection. It turned out that the jiffies clocksource is used in early boot before it is registered, which leaves the max_delta_raw field at zero. That causes the read out to be clamped to the max delta of 0, which means time is not making progress. Cure it by ensuring that it is initialized before its first usage in timekeeping_init().
References
Impacted products
Vendor Product Version
Linux Linux Version: 1a678f6829a8c931fae2b62e4c88dae743c839c9
Version: 76031d9536a076bf023bedbdb1b4317fc801dd67
Version: 76031d9536a076bf023bedbdb1b4317fc801dd67
Version: 76031d9536a076bf023bedbdb1b4317fc801dd67
Version: 6.12.5   ≤
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        {
          "defaultStatus": "unaffected",
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          "programFiles": [
            "kernel/time/jiffies.c"
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              "operator": "OR"
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntime/jiffies: Register jiffies clocksource before usage\n\nTeddy reported that a XEN HVM has a long boot delay, which was bisected to\nthe recent enhancements to the negative motion detection. It turned out\nthat the jiffies clocksource is used in early boot before it is registered,\nwhich leaves the max_delta_raw field at zero. That causes the read out to\nbe clamped to the max delta of 0, which means time is not making progress.\n\nCure it by ensuring that it is initialized before its first usage in\ntimekeeping_init()."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-17T04:58:40.365Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        },
        {
          "url": "https://git.kernel.org/stable/c/f24df84cbe05e4471c04ac4b921fc0340bbc7752"
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      "title": "time/jiffies: Register jiffies clocksource before usage",
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    "cveId": "CVE-2026-68092",
    "datePublished": "2026-08-10T11:51:47.895Z",
    "dateReserved": "2026-07-30T09:28:09.367Z",
    "dateUpdated": "2026-08-17T04:58:40.365Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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