CVE-2026-72027

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-72027", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-09T03:40:39.901Z", "datePublished": "2026-08-15T05:51:51.219Z", "dateUpdated": "2026-08-17T05:39:33.783Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T05:39:33.783Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/compaction: handle free_pages_prepare() properly in compaction_free()\n\nfree_pages_prepare() can fail but compaction_free() does not handle the\nfailure case. Failed pages should not be added back to cc->freepages for\nfuture use, since they can be either PageHWPoison or free_page_is_bad()\nand might cause data corruption."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - The flaw is in mm/compaction.c compaction_free(), reached only via local kernel memory-management paths (__alloc_pages_slowpath/try_to_compact_pages, kcompactd, or root sysctl), not from network packet handlers or physical device insertion.\nAC:L - An unprivileged attacker can reliably drive compaction (THP/high-order mmap, memory pressure) and concurrently force migrate_pages failures and races so compaction_free() runs on pages where free_pages_prepare() rejects them; both sides are attacker-influenceable.\nPR:L - No special capability is required: ordinary local processes trigger direct compaction through normal allocators and transparent hugepage mappings, and user namespaces do not block these memory syscalls or kcompactd-driven compaction on the host.\nUI:N - Exploitation requires only the attacker's own memory-allocation and churn activity; no separate victim must mount filesystems, open files, or perform other interactive steps beyond routine process execution.\nS:U - Recycling PageHWPoison or free_page_is_bad() pages corrupts host kernel page-allocator/compaction state and process memory within the same OS security authority, not a VM-guest-to-host or IOMMU boundary crossing.\nC:H - Reusing pages that failed free_pages_prepare() can expose stale kernel or cross-process contents and enables allocator/page aliasing primitives; under the overestimate rule, this memory-corruption class supports high confidentiality impact.\nI:H - The fix explicitly warns these pages may cause data corruption when returned to cc->freepages; compaction_alloc() later hands them to migrate_pages as destinations, allowing corrupted/compound state to be written into live mappings.\nA:H - Reallocating HWPoison or allocator-marked bad pages during compaction can trigger kernel faults, bad-page detection, oopses, or panics when the poisoned folio is touched, satisfying high availability impact under the kernel crash guidance."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["mm/compaction.c"], "versions": [{"version": "733aea0b3a7bba0451dfc19322665de13a5b7af4", "lessThan": "de8577db09039d4950239b01446ab5ead9028ab4", "status": "affected", "versionType": "git"}, {"version": "733aea0b3a7bba0451dfc19322665de13a5b7af4", "lessThan": "018d7ad26cb8bdfe9842f2ca68a42b0bfdcc82fe", "status": "affected", "versionType": "git"}, {"version": "733aea0b3a7bba0451dfc19322665de13a5b7af4", "lessThan": "23afc3786acf359c135093893fb43a436768c832", "status": "affected", "versionType": "git"}, {"version": "733aea0b3a7bba0451dfc19322665de13a5b7af4", "lessThan": "7da7d599b8a83271c464adfd5ef160202b470570", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["mm/compaction.c"], "versions": [{"version": "6.9", "status": "affected"}, {"version": "0", "lessThan": "6.9", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.97", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.40", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.5", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2", "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": "6.9", "versionEndExcluding": "6.12.97"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.9", "versionEndExcluding": "6.18.40"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.9", "versionEndExcluding": "7.1.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.9", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/de8577db09039d4950239b01446ab5ead9028ab4"}, {"url": "https://git.kernel.org/stable/c/018d7ad26cb8bdfe9842f2ca68a42b0bfdcc82fe"}, {"url": "https://git.kernel.org/stable/c/23afc3786acf359c135093893fb43a436768c832"}, {"url": "https://git.kernel.org/stable/c/7da7d599b8a83271c464adfd5ef160202b470570"}], "title": "mm/compaction: handle free_pages_prepare() properly in compaction_free()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["mm/compaction.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "de8577db09039d4950239b01446ab5ead9028ab4", "status": "affected", "version": "733aea0b3a7bba0451dfc19322665de13a5b7af4", "versionType": "git"}, {"lessThan": "018d7ad26cb8bdfe9842f2ca68a42b0bfdcc82fe", "status": "affected", "version": "733aea0b3a7bba0451dfc19322665de13a5b7af4", "versionType": "git"}, {"lessThan": "23afc3786acf359c135093893fb43a436768c832", "status": "affected", "version": "733aea0b3a7bba0451dfc19322665de13a5b7af4", "versionType": "git"}, {"lessThan": "7da7d599b8a83271c464adfd5ef160202b470570", "status": "affected", "version": "733aea0b3a7bba0451dfc19322665de13a5b7af4", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["mm/compaction.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.9"}, {"lessThan": "6.9", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.97", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.40", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.5", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/compaction: handle free_pages_prepare() properly in compaction_free()\n\nfree_pages_prepare() can fail but compaction_free() does not handle the\nfailure case. Failed pages should not be added back to cc->freepages for\nfuture use, since they can be either PageHWPoison or free_page_is_bad()\nand might cause data corruption."}], "id": "CVE-2026-72027", "lastModified": "2026-08-17T06:18:00.417", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-08-15T06:21:01.843", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/018d7ad26cb8bdfe9842f2ca68a42b0bfdcc82fe"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/23afc3786acf359c135093893fb43a436768c832"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7da7d599b8a83271c464adfd5ef160202b470570"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/de8577db09039d4950239b01446ab5ead9028ab4"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: mm/compaction: handle free_pages_prepare() properly in compaction_free()", "id": "2516454", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2516454"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-252", "details": ["A flaw was found in the Linux kernel's memory management subsystem, specifically within the `mm/compaction` component. When the `free_pages_prepare()` function fails, the `compaction_free()` function does not properly handle this error. This oversight can lead to pages that are either hardware poisoned (`PageHWPoison`) or otherwise marked as bad (`free_page_is_bad()`) being returned to the free page pool. Consequently, the reuse of these corrupted pages may lead to data corruption within the system."], "name": "CVE-2026-72027", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "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": "2026-08-15T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-72027\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-72027\nhttps://lore.kernel.org/linux-cve-announce/2026081511-CVE-2026-72027-4dc2@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[733aea0b3a7bba0451dfc19322665de13a5b7af4,de8577db09039d4950239b01446ab5ead9028ab4)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[733aea0b3a7bba0451dfc19322665de13a5b7af4,018d7ad26cb8bdfe9842f2ca68a42b0bfdcc82fe)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[733aea0b3a7bba0451dfc19322665de13a5b7af4,23afc3786acf359c135093893fb43a436768c832)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[733aea0b3a7bba0451dfc19322665de13a5b7af4,7da7d599b8a83271c464adfd5ef160202b470570)"}}], "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": "6.9"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.9)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.97,6.13.0]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.40,6.19.0]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.5,7.2.0]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2-rc3,*]"}}], "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": "2026-08-15T10:15:02.900286+00:00", "updated": "2026-08-18T04:00:10.857747+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}