CVE-2026-23106 (GCVE-0-2026-23106)
Vulnerability from cvelistv5
Published
2026-02-04 16:08
Modified
2026-05-11 22:00
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: timekeeping: Adjust the leap state for the correct auxiliary timekeeper When __do_ajdtimex() was introduced to handle adjtimex for any timekeeper, this reference to tk_core was not updated. When called on an auxiliary timekeeper, the core timekeeper would be updated incorrectly. This gets caught by the lock debugging diagnostics because the timekeepers sequence lock gets written to without holding its associated spinlock: WARNING: include/linux/seqlock.h:226 at __do_adjtimex+0x394/0x3b0, CPU#2: test/125 aux_clock_adj (kernel/time/timekeeping.c:2979) __do_sys_clock_adjtime (kernel/time/posix-timers.c:1161 kernel/time/posix-timers.c:1173) do_syscall_64 (arch/x86/entry/syscall_64.c:63 (discriminator 1) arch/x86/entry/syscall_64.c:94 (discriminator 1)) entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:131) Update the correct auxiliary timekeeper.
References
Impacted products
Vendor Product Version
Linux Linux Version: 775f71ebedd382da390dc16a4c28cffa5b937f79
Version: 775f71ebedd382da390dc16a4c28cffa5b937f79
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "kernel/time/timekeeping.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "lessThan": "8f7c9dbeaa0be5810e44d323735967d3dba9239d",
              "status": "affected",
              "version": "775f71ebedd382da390dc16a4c28cffa5b937f79",
              "versionType": "git"
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              "lessThan": "e806f7dde8ba28bc72a7a0898589cac79f6362ac",
              "status": "affected",
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              "versionType": "git"
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          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "kernel/time/timekeeping.c"
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.17"
            },
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              "lessThan": "6.17",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
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            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.19",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.8",
                  "versionStartIncluding": "6.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19",
                  "versionStartIncluding": "6.17",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntimekeeping: Adjust the leap state for the correct auxiliary timekeeper\n\nWhen __do_ajdtimex() was introduced to handle adjtimex for any\ntimekeeper, this reference to tk_core was not updated. When called on an\nauxiliary timekeeper, the core timekeeper would be updated incorrectly.\n\nThis gets caught by the lock debugging diagnostics because the\ntimekeepers sequence lock gets written to without holding its\nassociated spinlock:\n\nWARNING: include/linux/seqlock.h:226 at __do_adjtimex+0x394/0x3b0, CPU#2: test/125\naux_clock_adj (kernel/time/timekeeping.c:2979)\n__do_sys_clock_adjtime (kernel/time/posix-timers.c:1161 kernel/time/posix-timers.c:1173)\ndo_syscall_64 (arch/x86/entry/syscall_64.c:63 (discriminator 1) arch/x86/entry/syscall_64.c:94 (discriminator 1))\nentry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:131)\n\nUpdate the correct auxiliary timekeeper."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T22:00:14.456Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/8f7c9dbeaa0be5810e44d323735967d3dba9239d"
        },
        {
          "url": "https://git.kernel.org/stable/c/e806f7dde8ba28bc72a7a0898589cac79f6362ac"
        }
      ],
      "title": "timekeeping: Adjust the leap state for the correct auxiliary timekeeper",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-23106",
    "datePublished": "2026-02-04T16:08:27.046Z",
    "dateReserved": "2026-01-13T15:37:45.966Z",
    "dateUpdated": "2026-05-11T22:00:14.456Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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