{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-53326", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-06-09T07:44:35.398Z", "datePublished": "2026-07-01T13:32:12.924Z", "dateUpdated": "2026-07-04T11:51:04.894Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-07-04T11:51:04.894Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndebugobjects: Don't 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} -> {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": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["lib/debugobjects.c"], "versions": [{"version": "13abb2b11ac3b6cb89822f152e770081893e4bc3", "lessThan": "3cc90ea0dd0fb1f8db577dcdc027fc46c06049f6", "status": "affected", "versionType": "git"}, {"version": "0d2a64411b0974a469ff56e62441055147e5a194", "lessThan": "5d95f6b267f3d7fe54f42a3b224bb4a3d3990b41", "status": "affected", "versionType": "git"}, {"version": "c93859a52b0d6953cdaa17fd7fb46a6871b015cf", "lessThan": "27335c50014102e9077b784ebd314954286afcab", "status": "affected", "versionType": "git"}, {"version": "a460935022f512e167b4c5d4c12d85f89ba6aabd", "lessThan": "44b8b03a9fb5c575548fc72c674653d6baba142a", "status": "affected", "versionType": "git"}, {"version": "06e0ae988f6e3499785c407429953ade19c1096b", "lessThan": "7bc71bdb1c1526c7f02a6adab324394ff1327b0a", "status": "affected", "versionType": "git"}, {"version": "06e0ae988f6e3499785c407429953ade19c1096b", "lessThan": "0d046ae106255cba5eb83b23f78ee93f3620247d", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["lib/debugobjects.c"], "versions": [{"version": "6.19", "status": "affected"}, {"version": "0", "lessThan": "6.19", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.13", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.19", "versionEndExcluding": "7.0.13"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.19", "versionEndExcluding": "7.1"}]}]}], "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't call fill_pool() in early boot hardirq context", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

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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": "[email protected]", "type": "Primary"}]}, "published": "2026-07-01T14:16:40.443", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "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"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-667"}], "source": "[email protected]", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: debugobjects: Don't call fill_pool() in early boot hardirq context", "id": "2495947", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2495947"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-833", "details": ["A flaw was found in the Linux kernel's debugobjects subsystem. During early boot on a debug PREEMPT_RT kernel on an ARM64 system, interrupts can occur before the scheduler is fully enabled. In this specific window, the hard interrupt context handler may attempt to fill a pool, which can lead to a deadlock. This issue can cause the system to become unresponsive."], "name": "CVE-2026-53326", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-07-01T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-53326\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-53326\nhttps://lore.kernel.org/linux-cve-announce/2026070140-CVE-2026-53326-8836@gregkh/T"], "threat_severity": "Low"}

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