CVE-2026-89617

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-89617", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.735Z", "datePublished": "2026-09-11T19:45:16.737Z", "dateUpdated": "2026-10-19T08:49:49.792Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T08:49:49.792Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfs/ntfs3: validate dirty page table on log replay\n\nEach DIR_PAGE_ENTRY ends in a page_lcns[] array whose length is the on-disk\nlcns_follow field. check_rstbl() validates the table bookkeeping but never\nchecks that this array fits in the entry, so a crafted lcns_follow lets the\nv0->v1 conversion memmove and later replay passes run off the entry.\n\nAdd check_dp_table() to reject, right after check_rstbl(), any entry larger\nthan its size claims via struct_size() (the same expression used to allocate\nthese entries, so the check is overflow-safe by construction). All consumers\ncan then trust lcns_follow as the real capacity. This covers every\npage_lcns[] access whose index is bounded by the entry itself (the\nconversion memmove, the HotFix store via find_dp(), and the self-bounded\nscan loops). Accesses whose index comes from the log record need a separate\nbound and are handled in a follow-up patch."}], "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 - log_replay() is reached only from ntfs_fill_super via ntfs_loadlog_and_replay while mounting a local NTFS block device; the dirty-page table is parsed from on-disk $LogFile, not from ksmbd, nfsd, or any received-packet path.\nAC:L - The attacker fully controls DIR_PAGE_ENTRY.lcns_follow and the restart table in a crafted $LogFile, so a value larger than the entry size reliably drives the v0 conversion memmove, HotFix store, and lcns_follow-bounded scan loops off the entry with no race or uncontrollable layout.\nPR:L - Triggering log replay requires mounting the malicious NTFS image (CAP_SYS_ADMIN). Unprivileged users can cause that mount via user+mount namespaces, loop-backed images, or common desktop/Android helpers (udisks/gvfs/USB automount) without init-namespace root.\nUI:N - No separate victim action is required: the attacker mounts their own crafted NTFS image (or causes automount of media they supply) and log replay runs automatically in ntfs_fill_super before any further file access.\nS:U - Corruption is confined to kernel heap during NTFS journal replay in the same kernel security authority; it is a local privilege-escalation/memory-safety issue, not a VM, IOMMU, or sandbox escape.\nC:H - Crafted lcns_follow makes DeleteDirtyClusters, HotFix, and dirty-page scan loops read page_lcns[] far past the kmemdup'd DIR_PAGE_ENTRY, disclosing adjacent kernel heap; that OOB read plus heap corruption yields arbitrary disclosure primitives.\nI:H - HotFix writes attacker-controlled LCNs and DeleteDirtyClusters zeros page_lcns[j] for j < the forged lcns_follow, overflowing the restart-table heap object into neighboring kmalloc data and enabling arbitrary kernel writes or control-flow hijack.\nA:H - Out-of-bounds heap access during mount-time log replay corrupts slab metadata or adjacent objects, causing kernel oops/panic, and a huge lcns_follow can also hang the mount path in a multi-billion-iteration scan."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/ntfs3/fslog.c"], "versions": [{"version": "b46acd6a6a627d876898e1c84d3f84902264b445", "lessThan": "0e07ea2fc45a7b4757ef7bf1f692cc0180a08323", "status": "affected", "versionType": "git"}, {"version": "b46acd6a6a627d876898e1c84d3f84902264b445", "lessThan": "1e90b1703ee1a04cd3e9e399353fc536f5f3ba10", "status": "affected", "versionType": "git"}, {"version": "b46acd6a6a627d876898e1c84d3f84902264b445", "lessThan": "d23155634a4bc1183e761d5eb2c043b2e693cc98", "status": "affected", "versionType": "git"}, {"version": "b46acd6a6a627d876898e1c84d3f84902264b445", "lessThan": "1200c2779c43b62656ccbb67df9468a7a9af2484", "status": "affected", "versionType": "git"}, {"version": "b46acd6a6a627d876898e1c84d3f84902264b445", "lessThan": "2d94ffc9d7b5bb3517b129fe63b52d84bcd4ae56", "status": "affected", "versionType": "git"}, {"version": "b46acd6a6a627d876898e1c84d3f84902264b445", "lessThan": "0908da07c23be4f94b99dfd9a94765525f0fe4bd", "status": "affected", "versionType": "git"}, {"version": "b46acd6a6a627d876898e1c84d3f84902264b445", "lessThan": "006cb7713dec10368e699abc4367e5faa334c9a5", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/ntfs3/fslog.c"], "versions": [{"version": "5.15", "status": "affected"}, {"version": "0", "lessThan": "5.15", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.221", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.188", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.157", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.109", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.50", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.4", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "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": "5.15", "versionEndExcluding": "5.15.221"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.1.188"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.6.157"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.12.109"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.18.50"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "7.2.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/0e07ea2fc45a7b4757ef7bf1f692cc0180a08323"}, {"url": "https://git.kernel.org/stable/c/1e90b1703ee1a04cd3e9e399353fc536f5f3ba10"}, {"url": "https://git.kernel.org/stable/c/d23155634a4bc1183e761d5eb2c043b2e693cc98"}, {"url": "https://git.kernel.org/stable/c/1200c2779c43b62656ccbb67df9468a7a9af2484"}, {"url": "https://git.kernel.org/stable/c/2d94ffc9d7b5bb3517b129fe63b52d84bcd4ae56"}, {"url": "https://git.kernel.org/stable/c/0908da07c23be4f94b99dfd9a94765525f0fe4bd"}, {"url": "https://git.kernel.org/stable/c/006cb7713dec10368e699abc4367e5faa334c9a5"}], "title": "fs/ntfs3: validate dirty page table on log replay", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["fs/ntfs3/fslog.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "0e07ea2fc45a7b4757ef7bf1f692cc0180a08323", "status": "affected", "version": "b46acd6a6a627d876898e1c84d3f84902264b445", "versionType": "git"}, {"lessThan": "1e90b1703ee1a04cd3e9e399353fc536f5f3ba10", "status": "affected", "version": "b46acd6a6a627d876898e1c84d3f84902264b445", "versionType": "git"}, {"lessThan": "d23155634a4bc1183e761d5eb2c043b2e693cc98", "status": "affected", "version": "b46acd6a6a627d876898e1c84d3f84902264b445", "versionType": "git"}, {"lessThan": "1200c2779c43b62656ccbb67df9468a7a9af2484", "status": "affected", "version": "b46acd6a6a627d876898e1c84d3f84902264b445", "versionType": "git"}, {"lessThan": "2d94ffc9d7b5bb3517b129fe63b52d84bcd4ae56", "status": "affected", "version": "b46acd6a6a627d876898e1c84d3f84902264b445", "versionType": "git"}, {"lessThan": "0908da07c23be4f94b99dfd9a94765525f0fe4bd", "status": "affected", "version": "b46acd6a6a627d876898e1c84d3f84902264b445", "versionType": "git"}, {"lessThan": "006cb7713dec10368e699abc4367e5faa334c9a5", "status": "affected", "version": "b46acd6a6a627d876898e1c84d3f84902264b445", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["fs/ntfs3/fslog.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.15"}, {"lessThan": "5.15", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.221", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.188", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.157", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.109", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.50", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.4", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "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\nfs/ntfs3: validate dirty page table on log replay\n\nEach DIR_PAGE_ENTRY ends in a page_lcns[] array whose length is the on-disk\nlcns_follow field. check_rstbl() validates the table bookkeeping but never\nchecks that this array fits in the entry, so a crafted lcns_follow lets the\nv0->v1 conversion memmove and later replay passes run off the entry.\n\nAdd check_dp_table() to reject, right after check_rstbl(), any entry larger\nthan its size claims via struct_size() (the same expression used to allocate\nthese entries, so the check is overflow-safe by construction). All consumers\ncan then trust lcns_follow as the real capacity. This covers every\npage_lcns[] access whose index is bounded by the entry itself (the\nconversion memmove, the HotFix store via find_dp(), and the self-bounded\nscan loops). Accesses whose index comes from the log record need a separate\nbound and are handled in a follow-up patch."}], "id": "CVE-2026-89617", "lastModified": "2026-10-19T09:17:58.413", "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": "2026-09-11T20:19:46.917", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/006cb7713dec10368e699abc4367e5faa334c9a5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0908da07c23be4f94b99dfd9a94765525f0fe4bd"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0e07ea2fc45a7b4757ef7bf1f692cc0180a08323"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1200c2779c43b62656ccbb67df9468a7a9af2484"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1e90b1703ee1a04cd3e9e399353fc536f5f3ba10"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2d94ffc9d7b5bb3517b129fe63b52d84bcd4ae56"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d23155634a4bc1183e761d5eb2c043b2e693cc98"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Linux kernel: NTFS3 filesystem vulnerable to memory corruption via crafted log replay", "id": "2532222", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2532222"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.4", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-787", "details": ["A flaw was found in the Linux kernel's NTFS3 filesystem driver. An attacker with local access could craft a malicious NTFS log file. During log replay, insufficient validation of the `lcns_follow` field in a `DIR_PAGE_ENTRY` could lead to an out-of-bounds write. This memory corruption could result in a system crash (denial of service) or potentially allow for further exploitation."], "name": "CVE-2026-89617", "public_date": "2026-09-11T19:45:16Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-89617\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-89617\nhttps://git.kernel.org/stable/c/006cb7713dec10368e699abc4367e5faa334c9a5\nhttps://git.kernel.org/stable/c/0908da07c23be4f94b99dfd9a94765525f0fe4bd\nhttps://git.kernel.org/stable/c/1200c2779c43b62656ccbb67df9468a7a9af2484\nhttps://git.kernel.org/stable/c/2d94ffc9d7b5bb3517b129fe63b52d84bcd4ae56"], "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b46acd6a6a627d876898e1c84d3f84902264b445,1200c2779c43b62656ccbb67df9468a7a9af2484)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b46acd6a6a627d876898e1c84d3f84902264b445,2d94ffc9d7b5bb3517b129fe63b52d84bcd4ae56)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b46acd6a6a627d876898e1c84d3f84902264b445,0908da07c23be4f94b99dfd9a94765525f0fe4bd)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b46acd6a6a627d876898e1c84d3f84902264b445,006cb7713dec10368e699abc4367e5faa334c9a5)"}}], "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": "5.15"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,5.15)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.109,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.50,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.4,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3-rc1,*]"}}], "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": "2026-09-12T06:30:09.006835+00:00", "updated": "2026-09-15T21:30:16.427721+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}