FKIE_CVE-2026-53326

Vulnerability from fkie_nvd - Published: 2026-07-01 14:16 - Updated: 2026-07-01 14:16
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
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0d046ae106255cba5eb83b23f78ee93f3620247d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/44b8b03a9fb5c575548fc72c674653d6baba142a
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7bc71bdb1c1526c7f02a6adab324394ff1327b0a
Impacted products
Vendor Product Version
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{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "lib/debugobjects.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "44b8b03a9fb5c575548fc72c674653d6baba142a",
              "status": "affected",
              "version": "a460935022f512e167b4c5d4c12d85f89ba6aabd",
              "versionType": "git"
            },
            {
              "lessThan": "7bc71bdb1c1526c7f02a6adab324394ff1327b0a",
              "status": "affected",
              "version": "06e0ae988f6e3499785c407429953ade19c1096b",
              "versionType": "git"
            },
            {
              "lessThan": "0d046ae106255cba5eb83b23f78ee93f3620247d",
              "status": "affected",
              "version": "06e0ae988f6e3499785c407429953ade19c1096b",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "lib/debugobjects.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.19"
            },
            {
              "lessThan": "6.19",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.13",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "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\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."
    }
  ],
  "id": "CVE-2026-53326",
  "lastModified": "2026-07-01T14:16:40.443",
  "metrics": {},
  "published": "2026-07-01T14:16:40.443",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/0d046ae106255cba5eb83b23f78ee93f3620247d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/44b8b03a9fb5c575548fc72c674653d6baba142a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/7bc71bdb1c1526c7f02a6adab324394ff1327b0a"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}


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