CVE-2026-53326 (GCVE-0-2026-53326)
Vulnerability from cvelistv5
Published
2026-07-01 13:32
Modified
2026-07-04 11:51
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: debugobjects: Don't call fill_pool() in early boot hardirq context When booting a debug PREEMPT_RT kernel on an ARM64 system, a "inconsistent {HARDIRQ-ON-W} -> {IN-HARDIRQ-W} usage" lockdep warning message was reported to the console. During early boot, interrupts are enabled before the scheduler is enabled. In this window (before SYSTEM_SCHEDULING is set) interrupts can fire and in the hard interrupt context handler attempt to fill the pool This can lead to a deadlock when the interrupt occurred when the interrupt hits a region which holds a lock that is required to be taken in the allocation path. Add a new can_fill_pool() helper and reorder the exception rule and forbid this scenario by excluding allocations from hard interrupt context.
References
Impacted products
Vendor Product Version
Linux Linux Version: 13abb2b11ac3b6cb89822f152e770081893e4bc3
Version: 0d2a64411b0974a469ff56e62441055147e5a194
Version: c93859a52b0d6953cdaa17fd7fb46a6871b015cf
Version: a460935022f512e167b4c5d4c12d85f89ba6aabd
Version: 06e0ae988f6e3499785c407429953ade19c1096b
Version: 06e0ae988f6e3499785c407429953ade19c1096b
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "lib/debugobjects.c"
          ],
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          "versions": [
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          "vendor": "Linux",
          "versions": [
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              "version": "6.19"
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
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            {
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      "cpeApplicability": [
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              "cpeMatch": [
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                  "versionEndExcluding": "7.0.13",
                  "versionStartIncluding": "6.19",
                  "vulnerable": true
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                {
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                  "versionEndExcluding": "7.1",
                  "versionStartIncluding": "6.19",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndebugobjects: Don\u0027t call fill_pool() in early boot hardirq context\n\nWhen booting a debug PREEMPT_RT kernel on an ARM64 system, a \"inconsistent\n{HARDIRQ-ON-W} -\u003e {IN-HARDIRQ-W} usage\" lockdep warning message was\nreported to the console.\n\nDuring early boot, interrupts are enabled before the scheduler is\nenabled. In this window (before SYSTEM_SCHEDULING is set) interrupts can\nfire and in the hard interrupt context handler attempt to fill the pool\n\nThis can lead to a deadlock when the interrupt occurred when the interrupt\nhits a region which holds a lock that is required to be taken in the\nallocation path.\n\nAdd a new can_fill_pool() helper and reorder the exception rule and forbid\nthis scenario by excluding allocations from hard interrupt context."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-04T11:51:04.894Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/3cc90ea0dd0fb1f8db577dcdc027fc46c06049f6"
        },
        {
          "url": "https://git.kernel.org/stable/c/5d95f6b267f3d7fe54f42a3b224bb4a3d3990b41"
        },
        {
          "url": "https://git.kernel.org/stable/c/27335c50014102e9077b784ebd314954286afcab"
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        },
        {
          "url": "https://git.kernel.org/stable/c/0d046ae106255cba5eb83b23f78ee93f3620247d"
        }
      ],
      "title": "debugobjects: Don\u0027t call fill_pool() in early boot hardirq context",
      "x_generator": {
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  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-53326",
    "datePublished": "2026-07-01T13:32:12.924Z",
    "dateReserved": "2026-06-09T07:44:35.398Z",
    "dateUpdated": "2026-07-04T11:51:04.894Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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