Vulnerability-Lookup

FKIE_CVE-2026-53326

Vulnerability from fkie_nvd - Published: 2026-07-01 14:16 - Updated: 2026-07-23 20:52

Severity

5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/0d046ae106255cba5eb83b23f78ee93f3620247d	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/27335c50014102e9077b784ebd314954286afcab	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/3cc90ea0dd0fb1f8db577dcdc027fc46c06049f6	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/44b8b03a9fb5c575548fc72c674653d6baba142a	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/5d95f6b267f3d7fe54f42a3b224bb4a3d3990b41	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/7bc71bdb1c1526c7f02a6adab324394ff1327b0a	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	7.1
linux	linux_kernel	7.1
linux	linux_kernel	7.1
linux	linux_kernel	7.1
linux	linux_kernel	7.1
linux	linux_kernel	7.1
linux	linux_kernel	7.1

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "lib/debugobjects.c"
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              "status": "affected",
              "version": "13abb2b11ac3b6cb89822f152e770081893e4bc3",
              "versionType": "git"
            },
            {
              "lessThan": "5d95f6b267f3d7fe54f42a3b224bb4a3d3990b41",
              "status": "affected",
              "version": "0d2a64411b0974a469ff56e62441055147e5a194",
              "versionType": "git"
            },
            {
              "lessThan": "27335c50014102e9077b784ebd314954286afcab",
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            },
            {
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            {
              "lessThan": "7bc71bdb1c1526c7f02a6adab324394ff1327b0a",
              "status": "affected",
              "version": "06e0ae988f6e3499785c407429953ade19c1096b",
              "versionType": "git"
            },
            {
              "lessThan": "0d046ae106255cba5eb83b23f78ee93f3620247d",
              "status": "affected",
              "version": "06e0ae988f6e3499785c407429953ade19c1096b",
              "versionType": "git"
            }
          ]
        },
        {
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          "programFiles": [
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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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              "status": "unaffected",
              "version": "7.0.13",
              "versionType": "semver"
            },
            {
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              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "configurations": [
    {
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              "versionEndExcluding": "7.0.13",
              "versionStartIncluding": "6.19",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*",
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  "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": "2026-07-23T20:52:50.063",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2026-07-01T14:16:40.443",
  "references": [
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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    },
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    },
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    },
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
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    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-667"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2026-53326 (GCVE-0-2026-53326)

Vulnerability from cvelistv5 – Published: 2026-07-01 13:32 – Updated: 2026-07-04 11:51

Title

debugobjects: Don't call fill_pool() in early boot hardirq context

Summary

Severity

No CVSS data available.

Assigner

Linux

References

6 references

URL	Tags
https://git.kernel.org/stable/c/3cc90ea0dd0fb1f8d…
https://git.kernel.org/stable/c/5d95f6b267f3d7fe5…
https://git.kernel.org/stable/c/27335c50014102e90…
https://git.kernel.org/stable/c/44b8b03a9fb5c5755…
https://git.kernel.org/stable/c/7bc71bdb1c1526c7f…
https://git.kernel.org/stable/c/0d046ae106255cba5…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 13abb2b11ac3b6cb89822f152e770081893e4bc3 , < 3cc90ea0dd0fb1f8db577dcdc027fc46c06049f6 (git) Affected: 0d2a64411b0974a469ff56e62441055147e5a194 , < 5d95f6b267f3d7fe54f42a3b224bb4a3d3990b41 (git) Affected: c93859a52b0d6953cdaa17fd7fb46a6871b015cf , < 27335c50014102e9077b784ebd314954286afcab (git) Affected: a460935022f512e167b4c5d4c12d85f89ba6aabd , < 44b8b03a9fb5c575548fc72c674653d6baba142a (git) Affected: 06e0ae988f6e3499785c407429953ade19c1096b , < 7bc71bdb1c1526c7f02a6adab324394ff1327b0a (git) Affected: 06e0ae988f6e3499785c407429953ade19c1096b , < 0d046ae106255cba5eb83b23f78ee93f3620247d (git)
Linux	Linux	Affected: 6.19 Unaffected: 0 , < 6.19 (semver) Unaffected: 7.0.13 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "lib/debugobjects.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
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              "versionType": "git"
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}

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.

Action not permitted

FKIE_CVE-2026-53326

CVE-2026-53326 (GCVE-0-2026-53326)

Tags

Sightings

Nomenclature