{ "cvss": 7.8, "datePublished": "2026-07-27T08:16:22.383", "dateUpdated": "2026-11-03T18:15:39.353", "description": "In the Linux kernel, the following vulnerability has been resolved:\n\nfs/ntfs3: bound NTFS_DE view.data_off in UpdateRecordData{Root,Allocation}\n\nIn do_action()'s UpdateRecordDataRoot (fslog.c:3489) and\nUpdateRecordDataAllocation (fslog.c:3697) cases, the memmove\ndestination is `Add2Ptr(e, le16_to_cpu(e->view.data_off))`,\nwhere e->view.data_off comes from an on-disk NTFS_DE inside\nan INDEX_ROOT or INDEX_BUFFER. Neither case validates\nview.data_off + dlen against e->size; the existing\ncheck_if_index_root / check_if_alloc_index helpers walk the\nentry chain and validate the entry's offset, but not its\ninternal view fields.\n\nThe neighbouring read sites (e.g., fs/ntfs3/index.c when\niterating view entries) check view.data_off + view.data_size\n<= e->size. Apply the same bound at the two memmove sites.\n\nReproduced under UML+KASAN on mainline 8d90b09e6741 via\npr_warn-only probe instrumentation: with view.data_off forced\nto 0xFFFC, the memmove writes 32 bytes past the end of the\nNTFS_DE.\n\nThis is similar in shape to Pavitra Jha's 2026-05-02 patch\n\"fs/ntfs3: prevent oob in case UpdateRecordDataRoot\"\n(<20260502105008.21827-1-jhapavitra98@gmail.com>) which\nproposes calling ntfs3_bad_de_range(); that helper does not\nexist in mainline. This patch uses inline checks.", "id": "CVE-2026-64532", "raw": { "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": "b20e5a709d8bd190d6e4645606763c7423e694c1", "status": "affected", "version": "b46acd6a6a627d876898e1c84d3f84902264b445", "versionType": "git" }, { "lessThan": "d41b382068ca4e64e421f736cdd700095464b6ac", "status": "affected", "version": "b46acd6a6a627d876898e1c84d3f84902264b445", "versionType": "git" }, { "lessThan": "429d653ca641d38a78609b8f62e81a0a5c780a2d", "status": "affected", "version": "b46acd6a6a627d876898e1c84d3f84902264b445", "versionType": "git" }, { "lessThan": "315d3a9a48b49f889da3d858a9307e677cb9e1bd", "status": "affected", "version": "b46acd6a6a627d876898e1c84d3f84902264b445", "versionType": "git" }, { "lessThan": "be306b8d9143a9c076c804a7ca025d69caf9c448", "status": "affected", "version": "b46acd6a6a627d876898e1c84d3f84902264b445", "versionType": "git" }, { "lessThan": "36feda687afebae24c472202694448738809c411", "status": "affected", "version": "b46acd6a6a627d876898e1c84d3f84902264b445", "versionType": "git" }, { "lessThan": "3e127829e57f5190f612412ece4541cb96d5ec7a", "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": "5.15.212", "versionType": "semver" }, { "lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.178", "versionType": "semver" }, { "lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.145", "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\nfs/ntfs3: bound NTFS_DE view.data_off in UpdateRecordData{Root,Allocation}\n\nIn do_action()'s UpdateRecordDataRoot (fslog.c:3489) and\nUpdateRecordDataAllocation (fslog.c:3697) cases, the memmove\ndestination is `Add2Ptr(e, le16_to_cpu(e->view.data_off))`,\nwhere e->view.data_off comes from an on-disk NTFS_DE inside\nan INDEX_ROOT or INDEX_BUFFER. Neither case validates\nview.data_off + dlen against e->size; the existing\ncheck_if_index_root / check_if_alloc_index helpers walk the\nentry chain and validate the entry's offset, but not its\ninternal view fields.\n\nThe neighbouring read sites (e.g., fs/ntfs3/index.c when\niterating view entries) check view.data_off + view.data_size\n<= e->size. Apply the same bound at the two memmove sites.\n\nReproduced under UML+KASAN on mainline 8d90b09e6741 via\npr_warn-only probe instrumentation: with view.data_off forced\nto 0xFFFC, the memmove writes 32 bytes past the end of the\nNTFS_DE.\n\nThis is similar in shape to Pavitra Jha's 2026-05-02 patch\n\"fs/ntfs3: prevent oob in case UpdateRecordDataRoot\"\n(<20260502105008.21827-1-jhapavitra98@gmail.com>) which\nproposes calling ntfs3_bad_de_range(); that helper does not\nexist in mainline. This patch uses inline checks." } ], "id": "CVE-2026-64532", "lastModified": "2026-11-03T18:15:39.353", "metrics": { "cvssMetricV31": [ { "cvssData": { "attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/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" } ], "ssvcV203": [ { "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": { "id": "CVE-2026-64532", "options": [ { "exploitation": "none" }, { "automatable": "no" }, { "technicalImpact": "total" } ], "role": "CISA Coordinator", "timestamp": "2026-10-16T15:41:49.104430Z", "version": "2.0.3" } } ] }, "published": "2026-07-27T08:16:22.383", "references": [ { "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/315d3a9a48b49f889da3d858a9307e677cb9e1bd" }, { "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/36feda687afebae24c472202694448738809c411" }, { "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3e127829e57f5190f612412ece4541cb96d5ec7a" }, { "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/429d653ca641d38a78609b8f62e81a0a5c780a2d" }, { "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b20e5a709d8bd190d6e4645606763c7423e694c1" }, { "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/be306b8d9143a9c076c804a7ca025d69caf9c448" }, { "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d41b382068ca4e64e421f736cdd700095464b6ac" } ], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis", "weaknesses": [ { "description": [ { "lang": "en", "value": "CWE-787" } ], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary" } ] }, "severity": "HIGH", "source": "nvd", "title": "In the Linux kernel, the following vulnerability has been resolved:\n\nfs/ntfs3: bound NTFS_DE view.data_off in UpdateR..." }