CVE-2026-53342

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-53342", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-06-09T07:44:35.399Z", "datePublished": "2026-07-01T13:32:23.449Z", "dateUpdated": "2026-07-01T13:32:23.449Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-07-01T13:32:23.449Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\narm64: mm: call pagetable dtor when freeing hot-removed page tables\n\nSince 5e8eb9aeeda3 (\"arm64: mm: always call PTE/PMD ctor in\n__create_pgd_mapping()\") page-table allocation on ARM64 always calls\npagetable_{pte,pmd,pud,p4d}_ctor(). This sets the page_type to\nPGTY_table, increments NR_PAGETABLE and possible allocates a PTL. However\nthe matching pagetable_dtor() calls were never added.\n\nWith DEBUG_VM enabled on kernel versions prior to v6.17 without\n2dfcd1608f3a9 (\"mm/page_alloc: let page freeing clear any set page type\")\nthis leads to the following warning when freeing these pages due to\npage->page_type sharing page->_mapcount:\n\n BUG: Bad page state in process ... pfn:284fbb\n page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x284fbb\n flags: 0x17fffc000000000(node=0|zone=2|lastcpupid=0x1ffff)\n page_type: f2(table)\n page dumped because: nonzero mapcount\n Call trace:\n bad_page+0x13c/0x160\n __free_frozen_pages+0x6cc/0x860\n ___free_pages+0xf4/0x180\n free_pages+0x54/0x80\n free_hotplug_page_range.part.0+0x58/0x90\n free_empty_tables+0x438/0x500\n __remove_pgd_mapping.constprop.0+0x60/0xa8\n arch_remove_memory+0x48/0x80\n try_remove_memory+0x158/0x1d8\n offline_and_remove_memory+0x138/0x180\n\nIt can also lead to leaking the ptl allocation if ALLOC_SPLIT_PTLOCKS is\ndefined and incorrect NR_PAGETABLE stats. Fix this by calling\npagetable_dtor() in free_hotplug_pgtable_page() prior to freeing the page\nto undo the effects of calling pagetable_*_ctor()."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/arm64/mm/mmu.c"], "versions": [{"version": "5e8eb9aeeda3a7aaf48efa1d34ae804e894e307f", "lessThan": "95f27fcda681021ed3906d3cae7e68b6a57a1d8e", "status": "affected", "versionType": "git"}, {"version": "5e8eb9aeeda3a7aaf48efa1d34ae804e894e307f", "lessThan": "aaa688ac9f18207f7452c6472e647c1febaea6a3", "status": "affected", "versionType": "git"}, {"version": "5e8eb9aeeda3a7aaf48efa1d34ae804e894e307f", "lessThan": "c594b83457ccdee76d458416fb3bc9348a37592f", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/arm64/mm/mmu.c"], "versions": [{"version": "6.16", "status": "affected"}, {"version": "0", "lessThan": "6.16", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.36", "lessThanOrEqual": "6.18.*", "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": "6.16", "versionEndExcluding": "6.18.36"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.16", "versionEndExcluding": "7.0.13"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.16", "versionEndExcluding": "7.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/95f27fcda681021ed3906d3cae7e68b6a57a1d8e"}, {"url": "https://git.kernel.org/stable/c/aaa688ac9f18207f7452c6472e647c1febaea6a3"}, {"url": "https://git.kernel.org/stable/c/c594b83457ccdee76d458416fb3bc9348a37592f"}], "title": "arm64: mm: call pagetable dtor when freeing hot-removed page tables", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["arch/arm64/mm/mmu.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "95f27fcda681021ed3906d3cae7e68b6a57a1d8e", "status": "affected", "version": "5e8eb9aeeda3a7aaf48efa1d34ae804e894e307f", "versionType": "git"}, {"lessThan": "aaa688ac9f18207f7452c6472e647c1febaea6a3", "status": "affected", "version": "5e8eb9aeeda3a7aaf48efa1d34ae804e894e307f", "versionType": "git"}, {"lessThan": "c594b83457ccdee76d458416fb3bc9348a37592f", "status": "affected", "version": "5e8eb9aeeda3a7aaf48efa1d34ae804e894e307f", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["arch/arm64/mm/mmu.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.16"}, {"lessThan": "6.16", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.36", "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"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "C502A34A-34EF-41DB-9280-104B7360171B", "versionEndExcluding": "6.18.36", "versionStartIncluding": "6.16", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "6A64BF9F-3BCA-42FD-98CB-8F03474D2B1E", "versionEndExcluding": "7.0.13", "versionStartIncluding": "6.19", "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", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\narm64: mm: call pagetable dtor when freeing hot-removed page tables\n\nSince 5e8eb9aeeda3 (\"arm64: mm: always call PTE/PMD ctor in\n__create_pgd_mapping()\") page-table allocation on ARM64 always calls\npagetable_{pte,pmd,pud,p4d}_ctor(). This sets the page_type to\nPGTY_table, increments NR_PAGETABLE and possible allocates a PTL. However\nthe matching pagetable_dtor() calls were never added.\n\nWith DEBUG_VM enabled on kernel versions prior to v6.17 without\n2dfcd1608f3a9 (\"mm/page_alloc: let page freeing clear any set page type\")\nthis leads to the following warning when freeing these pages due to\npage->page_type sharing page->_mapcount:\n\n BUG: Bad page state in process ... pfn:284fbb\n page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x284fbb\n flags: 0x17fffc000000000(node=0|zone=2|lastcpupid=0x1ffff)\n page_type: f2(table)\n page dumped because: nonzero mapcount\n Call trace:\n bad_page+0x13c/0x160\n __free_frozen_pages+0x6cc/0x860\n ___free_pages+0xf4/0x180\n free_pages+0x54/0x80\n free_hotplug_page_range.part.0+0x58/0x90\n free_empty_tables+0x438/0x500\n __remove_pgd_mapping.constprop.0+0x60/0xa8\n arch_remove_memory+0x48/0x80\n try_remove_memory+0x158/0x1d8\n offline_and_remove_memory+0x138/0x180\n\nIt can also lead to leaking the ptl allocation if ALLOC_SPLIT_PTLOCKS is\ndefined and incorrect NR_PAGETABLE stats. Fix this by calling\npagetable_dtor() in free_hotplug_pgtable_page() prior to freeing the page\nto undo the effects of calling pagetable_*_ctor()."}], "id": "CVE-2026-53342", "lastModified": "2026-07-23T21:32:31.813", "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": "2026-07-01T14:16:42.260", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/95f27fcda681021ed3906d3cae7e68b6a57a1d8e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/aaa688ac9f18207f7452c6472e647c1febaea6a3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c594b83457ccdee76d458416fb3bc9348a37592f"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: arm64: mm: call pagetable dtor when freeing hot-removed page tables", "id": "2495945", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2495945"}, "csaw": false, "cwe": "CWE-459", "details": ["A flaw was found in the Linux kernel, specifically within the ARM64 architecture's memory management. This vulnerability occurs because the system fails to properly deallocate page tables that have been hot-removed, leading to memory leaks. This can result in incorrect memory usage statistics and, under certain debugging configurations, trigger system warnings indicating a bad page state. The issue stems from missing calls to the `pagetable_dtor()` function, which is responsible for cleaning up page table resources."], "name": "CVE-2026-53342", "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": "Not affected", "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-2026-53342\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-53342\nhttps://lore.kernel.org/linux-cve-announce/2026070144-CVE-2026-53342-cd87@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[5e8eb9aeeda3a7aaf48efa1d34ae804e894e307f,95f27fcda681021ed3906d3cae7e68b6a57a1d8e)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[5e8eb9aeeda3a7aaf48efa1d34ae804e894e307f,aaa688ac9f18207f7452c6472e647c1febaea6a3)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[5e8eb9aeeda3a7aaf48efa1d34ae804e894e307f,c594b83457ccdee76d458416fb3bc9348a37592f)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "6.16"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.16)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.36,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.0.13,7.1.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-07-01T17:00:05.910896+00:00", "updated": "2026-08-12T09:00:10.285588+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}