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

Vulnerability from cvelistv5 – Published: 2026-07-01 13:32 – Updated: 2026-07-04 11:51
VLAI
Title
debugobjects: Don't call fill_pool() in early boot hardirq context
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.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted 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)
Create a notification for this product.
Linux Linux Affected: 6.19
Unaffected: 0 , < 6.19 (semver)
Unaffected: 7.0.13 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Show details on NVD website
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",
          "versions": [
            {
              "lessThan": "3cc90ea0dd0fb1f8db577dcdc027fc46c06049f6",
              "status": "affected",
              "version": "13abb2b11ac3b6cb89822f152e770081893e4bc3",
              "versionType": "git"
            },
            {
              "lessThan": "5d95f6b267f3d7fe54f42a3b224bb4a3d3990b41",
              "status": "affected",
              "version": "0d2a64411b0974a469ff56e62441055147e5a194",
              "versionType": "git"
            },
            {
              "lessThan": "27335c50014102e9077b784ebd314954286afcab",
              "status": "affected",
              "version": "c93859a52b0d6953cdaa17fd7fb46a6871b015cf",
              "versionType": "git"
            },
            {
              "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"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0.13",
                  "versionStartIncluding": "6.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "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": [
        {
          "url": "https://git.kernel.org/stable/c/3cc90ea0dd0fb1f8db577dcdc027fc46c06049f6"
        },
        {
          "url": "https://git.kernel.org/stable/c/5d95f6b267f3d7fe54f42a3b224bb4a3d3990b41"
        },
        {
          "url": "https://git.kernel.org/stable/c/27335c50014102e9077b784ebd314954286afcab"
        },
        {
          "url": "https://git.kernel.org/stable/c/44b8b03a9fb5c575548fc72c674653d6baba142a"
        },
        {
          "url": "https://git.kernel.org/stable/c/7bc71bdb1c1526c7f02a6adab324394ff1327b0a"
        },
        {
          "url": "https://git.kernel.org/stable/c/0d046ae106255cba5eb83b23f78ee93f3620247d"
        }
      ],
      "title": "debugobjects: Don\u0027t call fill_pool() in early boot hardirq context",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "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",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-53326",
      "date": "2026-07-24",
      "epss": "0.00095",
      "percentile": "0.00761"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-53326\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-07-01T14:16:40.443\",\"lastModified\":\"2026-07-23T20:52:50.063\",\"vulnStatus\":\"Analyzed\",\"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.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"lib/debugobjects.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"13abb2b11ac3b6cb89822f152e770081893e4bc3\",\"lessThan\":\"3cc90ea0dd0fb1f8db577dcdc027fc46c06049f6\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"0d2a64411b0974a469ff56e62441055147e5a194\",\"lessThan\":\"5d95f6b267f3d7fe54f42a3b224bb4a3d3990b41\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"c93859a52b0d6953cdaa17fd7fb46a6871b015cf\",\"lessThan\":\"27335c50014102e9077b784ebd314954286afcab\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"a460935022f512e167b4c5d4c12d85f89ba6aabd\",\"lessThan\":\"44b8b03a9fb5c575548fc72c674653d6baba142a\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"06e0ae988f6e3499785c407429953ade19c1096b\",\"lessThan\":\"7bc71bdb1c1526c7f02a6adab324394ff1327b0a\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"06e0ae988f6e3499785c407429953ade19c1096b\",\"lessThan\":\"0d046ae106255cba5eb83b23f78ee93f3620247d\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"lib/debugobjects.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6.19\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"6.19\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.0.13\",\"lessThanOrEqual\":\"7.0.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-667\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.19\",\"versionEndExcluding\":\"7.0.13\",\"matchCriteriaId\":\"6A64BF9F-3BCA-42FD-98CB-8F03474D2B1E\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"B1EF7059-E670-45F4-B422-54C40FA86390\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"0D38F0BF-A728-4133-A358-D44A2F7EE6D6\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"EC732D08-5F7B-46D9-B154-E60C7F4F0A97\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:*\",\"matchCriteriaId\":\"E5910A9D-F60A-409A-B486-FE66BFEBA9B9\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:7.1:rc5:*:*:*:*:*:*\",\"matchCriteriaId\":\"81DFF19E-9CF8-49C6-8C36-1E4038622933\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:7.1:rc6:*:*:*:*:*:*\",\"matchCriteriaId\":\"B0E8FC71-3952-444C-83E9-718DBBBEC615\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:7.1:rc7:*:*:*:*:*:*\",\"matchCriteriaId\":\"1039E95A-8CC3-4C88-8FF9-5C08EEB861C9\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0d046ae106255cba5eb83b23f78ee93f3620247d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/27335c50014102e9077b784ebd314954286afcab\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/3cc90ea0dd0fb1f8db577dcdc027fc46c06049f6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/44b8b03a9fb5c575548fc72c674653d6baba142a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/5d95f6b267f3d7fe54f42a3b224bb4a3d3990b41\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/7bc71bdb1c1526c7f02a6adab324394ff1327b0a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-07-23T22:44:59+00:00",
      "cve": "CVE-2026-53326",
      "id": "CVE-2026-53326",
      "initial_release_date": "2026-07-01T00:00:00+00:00",
      "product_status:known_affected": "14",
      "product_status:known_not_affected": "260",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: debugobjects: Don\u0027t call fill_pool() in early boot hardirq context",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53326.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-07-03T03:04:36Z",
      "cve": "CVE-2026-53326",
      "id": "CVE-2026-53326",
      "initial_release_date": "2026-07-03T03:04:36Z",
      "product_status:known_not_affected": "277",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-53326",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-53326.json",
      "version": "2"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.