CVE-2026-53207

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If concurrent unmap has released\nthe page table mapping reference, folio_put() drops the folio refcount to\nzero, triggering free_huge_folio() which attempts to re-acquire the\nnon-recursive hugetlb_lock.\n\nFix this by moving hugetlb_lock acquisition from the hugetlb.c wrapper\ninto get_huge_page_for_hwpoison(). Place spin_unlock_irq() before the\nfolio_put() at the out: label so the folio is always released outside the\nlock.\n\n[akpm@linux-foundation.org: fix race, rename label per Miaohe]"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["include/linux/hugetlb.h", "include/linux/mm.h", "mm/hugetlb.c", "mm/memory-failure.c"], "versions": [{"version": "405ce051236cc65b30bbfe490b28ce60ae6aed85", "lessThan": "fc3ff42cb0cbf947e4600ae9761c3783760050e2", "status": "affected", "versionType": "git"}, {"version": "405ce051236cc65b30bbfe490b28ce60ae6aed85", "lessThan": "77b73b54801ae7137479c141fd0473a491c1dc48", "status": "affected", "versionType": "git"}, {"version": "405ce051236cc65b30bbfe490b28ce60ae6aed85", "lessThan": "a33bfed648c10f5a1519981dbfad80841191edc8", "status": "affected", "versionType": "git"}, {"version": "405ce051236cc65b30bbfe490b28ce60ae6aed85", "lessThan": "dd77a83915b07e2b0205adb284f08b39ae31dc4b", "status": "affected", "versionType": "git"}, {"version": "405ce051236cc65b30bbfe490b28ce60ae6aed85", "lessThan": "bf7ba8f96c258c30393814491930ae4ecdc5fe5e", "status": "affected", "versionType": "git"}, {"version": "405ce051236cc65b30bbfe490b28ce60ae6aed85", "lessThan": "3c2d42b8ee345b17a4ba56b0f6492d1ff4c1178e", "status": "affected", "versionType": "git"}, {"version": "62d1655b922958826b7ec22682c3141746f75064", "status": "affected", "versionType": "git"}, {"version": "5.15.54", "lessThan": "5.16", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["include/linux/hugetlb.h", "include/linux/mm.h", "mm/hugetlb.c", "mm/memory-failure.c"], "versions": [{"version": "5.18", "status": "affected"}, {"version": "0", "lessThan": "5.18", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.176", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.143", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.94", "lessThanOrEqual": "6.12.*", "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": "5.18", "versionEndExcluding": "6.1.176"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "6.6.143"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "6.12.94"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "6.18.36"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "7.0.13"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "7.1"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15.54"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/fc3ff42cb0cbf947e4600ae9761c3783760050e2"}, {"url": "https://git.kernel.org/stable/c/77b73b54801ae7137479c141fd0473a491c1dc48"}, {"url": "https://git.kernel.org/stable/c/a33bfed648c10f5a1519981dbfad80841191edc8"}, {"url": "https://git.kernel.org/stable/c/dd77a83915b07e2b0205adb284f08b39ae31dc4b"}, {"url": "https://git.kernel.org/stable/c/bf7ba8f96c258c30393814491930ae4ecdc5fe5e"}, {"url": "https://git.kernel.org/stable/c/3c2d42b8ee345b17a4ba56b0f6492d1ff4c1178e"}], "title": "mm/memory-failure: fix hugetlb_lock AA deadlock in get_huge_page_for_hwpoison", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-53207", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-11-06T16:22:16.567488Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-11-06T16:24:07.154Z"}}]}}

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If concurrent unmap has released\nthe page table mapping reference, folio_put() drops the folio refcount to\nzero, triggering free_huge_folio() which attempts to re-acquire the\nnon-recursive hugetlb_lock.\n\nFix this by moving hugetlb_lock acquisition from the hugetlb.c wrapper\ninto get_huge_page_for_hwpoison(). Place spin_unlock_irq() before the\nfolio_put() at the out: label so the folio is always released outside the\nlock.\n\n[akpm@linux-foundation.org: fix race, rename label per Miaohe]"}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.176", "versionStartIncluding": "5.18"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.143", "versionStartIncluding": "5.18"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12.94", "versionStartIncluding": "5.18"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.18.36", "versionStartIncluding": "5.18"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.0.13", "versionStartIncluding": "5.18"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.1", "versionStartIncluding": "5.18"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionStartIncluding": "5.15.54"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-06-25T08:39:13.592Z"}}}, "cveMetadata": {"cveId": "CVE-2026-53207", "state": "PUBLISHED", "dateUpdated": "2026-11-06T16:24:07.154Z", "dateReserved": "2026-06-09T07:44:35.391Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2026-06-25T08:39:13.592Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

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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}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/memory-failure: fix hugetlb_lock AA deadlock in get_huge_page_for_hwpoison\n\nTwo concurrent madvise(MADV_HWPOISON) calls on the same hugetlb page can\ntrigger a recursive spinlock self-deadlock (AA deadlock) on hugetlb_lock\nwhen racing with a concurrent unmap:\n\n thread#0 thread#1\n -------- --------\n madvise(folio, MADV_HWPOISON)\n -> poisons the folio successfully\n madvise(folio, MADV_HWPOISON) unmap(folio)\n try_memory_failure_hugetlb\n get_huge_page_for_hwpoison\n spin_lock_irq(&hugetlb_lock) <- held\n __get_huge_page_for_hwpoison\n hugetlb_update_hwpoison()\n -> MF_HUGETLB_FOLIO_PRE_POISONED\n goto out:\n folio_put()\n refcount: 1 -> 0\n free_huge_folio()\n spin_lock_irqsave(&hugetlb_lock)\n -> AA DEADLOCK!\n\nThe out: path in __get_huge_page_for_hwpoison() calls folio_put() to drop\nthe GUP reference while the hugetlb_lock is still held by the hugetlb.c\nwrapper get_huge_page_for_hwpoison(). If concurrent unmap has released\nthe page table mapping reference, folio_put() drops the folio refcount to\nzero, triggering free_huge_folio() which attempts to re-acquire the\nnon-recursive hugetlb_lock.\n\nFix this by moving hugetlb_lock acquisition from the hugetlb.c wrapper\ninto get_huge_page_for_hwpoison(). Place spin_unlock_irq() before the\nfolio_put() at the out: label so the folio is always released outside the\nlock.\n\n[akpm@linux-foundation.org: fix race, rename label per Miaohe]"}], "id": "CVE-2026-53207", "lastModified": "2026-11-06T17:18:13.840", "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"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-53207", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-11-06T16:22:16.567488Z", "version": "2.0.3"}}]}, "published": "2026-06-25T09:16:38.233", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/3c2d42b8ee345b17a4ba56b0f6492d1ff4c1178e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/77b73b54801ae7137479c141fd0473a491c1dc48"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a33bfed648c10f5a1519981dbfad80841191edc8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/bf7ba8f96c258c30393814491930ae4ecdc5fe5e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/dd77a83915b07e2b0205adb284f08b39ae31dc4b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/fc3ff42cb0cbf947e4600ae9761c3783760050e2"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-667"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: mm/memory-failure: fix hugetlb_lock AA deadlock in get_huge_page_for_hwpoison", "id": "2492821", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2492821"}, "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 memory management, specifically concerning huge pages. When two concurrent memory poisoning operations (`madvise(MADV_HWPOISON)`) occur on the same huge page while it is also being unmapped, a recursive spinlock self-deadlock can be triggered. This can lead to a system deadlock, resulting in a Denial of Service (DoS) where the system becomes unresponsive."], "name": "CVE-2026-53207", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "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": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-06-25T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-53207\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-53207\nhttps://lore.kernel.org/linux-cve-announce/2026062502-CVE-2026-53207-3c7c@gregkh/T"], "threat_severity": "Low"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[405ce051236cc65b30bbfe490b28ce60ae6aed85,fc3ff42cb0cbf947e4600ae9761c3783760050e2)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[405ce051236cc65b30bbfe490b28ce60ae6aed85,77b73b54801ae7137479c141fd0473a491c1dc48)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[405ce051236cc65b30bbfe490b28ce60ae6aed85,a33bfed648c10f5a1519981dbfad80841191edc8)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[405ce051236cc65b30bbfe490b28ce60ae6aed85,bf7ba8f96c258c30393814491930ae4ecdc5fe5e)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[405ce051236cc65b30bbfe490b28ce60ae6aed85,dd77a83915b07e2b0205adb284f08b39ae31dc4b)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[405ce051236cc65b30bbfe490b28ce60ae6aed85,3c2d42b8ee345b17a4ba56b0f6492d1ff4c1178e)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "62d1655b922958826b7ec22682c3141746f75064"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[5.15.54,5.16)"}}], "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": "5.18"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,5.18)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.176,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.143,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.94,6.13.0)"}}, {"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": "2026-06-25T11:30:06.465618+00:00", "updated": "2026-08-13T14:15:05.248132+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}