CVE-2026-97437

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-97437", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-24T14:53:16.869Z", "datePublished": "2026-09-24T16:03:50.105Z", "dateUpdated": "2026-10-03T10:58:22.091Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-03T10:58:22.091Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nntfs3: fix out-of-bounds read in ntfs_dir_emit() and hdr_find_e()\n\nThe bounds check in ntfs_dir_emit() compares fname->name_len (a\ncharacter count) against e->size (a byte count) without accounting\nfor the 2-byte-per-character UTF-16LE encoding or the ATTR_FILE_NAME\nheader size:\n\n if (fname->name_len + sizeof(struct NTFS_DE) > le16_to_cpu(e->size))\n\nThis computes: name_len + 16 > e_size\n\nThe correct check must account for the ATTR_FILE_NAME header (66 bytes\nbefore the name) and the UTF-16LE character size (2 bytes each):\n\n sizeof(NTFS_DE) + offsetof(ATTR_FILE_NAME, name) +\n name_len * sizeof(short) > e_size\n\nWhich computes: 16 + 66 + name_len * 2 > e_size\n\nThe correct calculation already exists as fname_full_size() in ntfs.h\nand is used in cmp_fnames(), namei.c, and fslog.c, but was not used\nin the readdir path.\n\nA crafted NTFS image with an index entry containing a small e->size\nbut large fname->name_len bypasses the current check, causing\nntfs_utf16_to_nls() to read past the entry boundary.\n\nAdditionally, add a key_size validation in hdr_find_e() to ensure the\ndeclared key_size does not exceed the available entry data, preventing\ncomparison functions from reading past entry boundaries on the lookup\npath."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H", "baseScore": 7.1, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - The attacker-controlled bytes are on-disk NTFS_DE.size, ATTR_FILE_NAME.name_len and NTFS_DE.key_size. getdents64\u2192iterate_dir\u2192ntfs_readdir\u2192ntfs_read_hdr\u2192ntfs_dir_emit() and ntfs_lookup/ntfs_fill_super\u2192ntfs_extend_init\u2192dir_search_u\u2192indx_find\u2192hdr_find_e() consume those fields; no SMB, NFS, or TCP message carries them.\nAC:L - A crafted index entry with e->size >= name_len+sizeof(NTFS_DE) but smaller than sizeof(NTFS_DE)+offsetof(ATTR_FILE_NAME,name)+name_len*2 bypasses the old ntfs_dir_emit() check so ntfs_utf16_to_nls() over-reads on every readdir of that directory; the same image can set key_size > e->size-sizeof(NTFS_DE) so hdr_find_e() passes an oversized key to cmp_fnames(). No race.\nPR:N - Crafting the NTFS image needs no host account. ntfs_fs_type.fs_flags is only FS_REQUIRES_DEV|FS_ALLOW_IDMAP (no FS_USERNS_MOUNT), so mount_capable() requires init-namespace CAP_SYS_ADMIN; that mount is scored as UI:R, not attacker privilege. ntfs_dir_emit() and hdr_find_e() have no capable() gate after the volume is mounted.\nUI:R - The bad name_len and key_size are inert on-disk until a victim or automount helper mounts the image via path_mount\u2192get_tree_bdev\u2192ntfs_fill_super. That mount is the required user action; ntfs_extend_init() even calls dir_search_u()\u2192hdr_find_e() during fill_super, and a subsequent getdents reaches ntfs_dir_emit().\nS:U - The over-read in ntfs_utf16_to_nls()/cmp_fnames() and any oops stay in the host kernel that mounted the volume. This is not a KVM/Xen guest-to-host escape or an IOMMU/DMA boundary bypass.\nC:H - ntfs_dir_emit() hands attacker-chosen fname->name_len (u8, up to 255 UTF-16 units) to ntfs_utf16_to_nls() after a check that ignores the 66-byte ATTR_FILE_NAME header and 2-byte encoding, so up to ~321 bytes past the NTFS_DE\u2014and past indx_read()'s kmalloc(1<<index_bits) if the entry is at the buffer tail\u2014are converted and dir_emit()'d into getdents. hdr_find_e() likewise lets cmp_fnames() read past that slab.\nI:N - ntfs_utf16_to_nls() writes only into the PATH_MAX buffer kmalloc'd by ntfs_readdir(); dir_emit()/filldir() then copy that name to the user dirent. hdr_find_e's cmp_fnames() returns only a comparison integer. Neither path is an out-of-bounds write, UAF, or control-flow hijack.\nA:H - indx_read() kmallocs 1<<index_bits (typically 4K) for the INDEX_BUFFER. An entry near the end with name_len=255, or key_size larger than the remaining payload, makes ntfs_utf16_to_nls() or fname_full_size() in cmp_fnames() read off that object, which can fault unmapped adjacent pages and oops the kernel."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/ntfs3/dir.c", "fs/ntfs3/index.c"], "versions": [{"version": "4342306f0f0d5ff4315a204d315c1b51b914fca5", "lessThan": "d1f98938e437732c0ecdfc8ee451e12a072f6d07", "status": "affected", "versionType": "git"}, {"version": "4342306f0f0d5ff4315a204d315c1b51b914fca5", "lessThan": "0505f1e7bb5b981b6ed62d98b26ddce76142865d", "status": "affected", "versionType": "git"}, {"version": "4342306f0f0d5ff4315a204d315c1b51b914fca5", "lessThan": "2f7d0ec8c10dc7bf7a8c9a9cb169f9a4d1fac2ba", "status": "affected", "versionType": "git"}, {"version": "4342306f0f0d5ff4315a204d315c1b51b914fca5", "lessThan": "ed6da1abeec50db9060d714f03743fe0b63e4fe4", "status": "affected", "versionType": "git"}, {"version": "4342306f0f0d5ff4315a204d315c1b51b914fca5", "lessThan": "6a8149a20e46086c756c2a9202e377c0b649a0c3", "status": "affected", "versionType": "git"}, {"version": "4342306f0f0d5ff4315a204d315c1b51b914fca5", "lessThan": "aa1bdbb39f49c5bc9779316891c40005517842a5", "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/dir.c", "fs/ntfs3/index.c"], "versions": [{"version": "5.15", "status": "affected"}, {"version": "0", "lessThan": "5.15", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.222", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.189", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.158", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.111", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.53", "lessThanOrEqual": "6.18.*", "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": "5.15", "versionEndExcluding": "5.15.222"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.1.189"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.6.158"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.12.111"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.18.53"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/d1f98938e437732c0ecdfc8ee451e12a072f6d07"}, {"url": "https://git.kernel.org/stable/c/0505f1e7bb5b981b6ed62d98b26ddce76142865d"}, {"url": "https://git.kernel.org/stable/c/2f7d0ec8c10dc7bf7a8c9a9cb169f9a4d1fac2ba"}, {"url": "https://git.kernel.org/stable/c/ed6da1abeec50db9060d714f03743fe0b63e4fe4"}, {"url": "https://git.kernel.org/stable/c/6a8149a20e46086c756c2a9202e377c0b649a0c3"}, {"url": "https://git.kernel.org/stable/c/aa1bdbb39f49c5bc9779316891c40005517842a5"}], "title": "ntfs3: fix out-of-bounds read in ntfs_dir_emit() and hdr_find_e()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["fs/ntfs3/dir.c", "fs/ntfs3/index.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "d1f98938e437732c0ecdfc8ee451e12a072f6d07", "status": "affected", "version": "4342306f0f0d5ff4315a204d315c1b51b914fca5", "versionType": "git"}, {"lessThan": "0505f1e7bb5b981b6ed62d98b26ddce76142865d", "status": "affected", "version": "4342306f0f0d5ff4315a204d315c1b51b914fca5", "versionType": "git"}, {"lessThan": "2f7d0ec8c10dc7bf7a8c9a9cb169f9a4d1fac2ba", "status": "affected", "version": "4342306f0f0d5ff4315a204d315c1b51b914fca5", "versionType": "git"}, {"lessThan": "ed6da1abeec50db9060d714f03743fe0b63e4fe4", "status": "affected", "version": "4342306f0f0d5ff4315a204d315c1b51b914fca5", "versionType": "git"}, {"lessThan": "6a8149a20e46086c756c2a9202e377c0b649a0c3", "status": "affected", "version": "4342306f0f0d5ff4315a204d315c1b51b914fca5", "versionType": "git"}, {"lessThan": "aa1bdbb39f49c5bc9779316891c40005517842a5", "status": "affected", "version": "4342306f0f0d5ff4315a204d315c1b51b914fca5", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["fs/ntfs3/dir.c", "fs/ntfs3/index.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": "5.15.222", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.189", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.158", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.111", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.53", "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\nntfs3: fix out-of-bounds read in ntfs_dir_emit() and hdr_find_e()\n\nThe bounds check in ntfs_dir_emit() compares fname->name_len (a\ncharacter count) against e->size (a byte count) without accounting\nfor the 2-byte-per-character UTF-16LE encoding or the ATTR_FILE_NAME\nheader size:\n\n if (fname->name_len + sizeof(struct NTFS_DE) > le16_to_cpu(e->size))\n\nThis computes: name_len + 16 > e_size\n\nThe correct check must account for the ATTR_FILE_NAME header (66 bytes\nbefore the name) and the UTF-16LE character size (2 bytes each):\n\n sizeof(NTFS_DE) + offsetof(ATTR_FILE_NAME, name) +\n name_len * sizeof(short) > e_size\n\nWhich computes: 16 + 66 + name_len * 2 > e_size\n\nThe correct calculation already exists as fname_full_size() in ntfs.h\nand is used in cmp_fnames(), namei.c, and fslog.c, but was not used\nin the readdir path.\n\nA crafted NTFS image with an index entry containing a small e->size\nbut large fname->name_len bypasses the current check, causing\nntfs_utf16_to_nls() to read past the entry boundary.\n\nAdditionally, add a key_size validation in hdr_find_e() to ensure the\ndeclared key_size does not exceed the available entry data, preventing\ncomparison functions from reading past entry boundaries on the lookup\npath."}], "id": "CVE-2026-97437", "lastModified": "2026-10-03T11:17:55.200", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.2, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-09-24T17:17:21.810", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0505f1e7bb5b981b6ed62d98b26ddce76142865d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2f7d0ec8c10dc7bf7a8c9a9cb169f9a4d1fac2ba"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6a8149a20e46086c756c2a9202e377c0b649a0c3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/aa1bdbb39f49c5bc9779316891c40005517842a5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d1f98938e437732c0ecdfc8ee451e12a072f6d07"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ed6da1abeec50db9060d714f03743fe0b63e4fe4"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: ntfs3: fix out-of-bounds read in ntfs_dir_emit() and hdr_find_e()", "id": "2540497", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2540497"}, "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-125", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nntfs3: fix out-of-bounds read in ntfs_dir_emit() and hdr_find_e()\nThe bounds check in ntfs_dir_emit() compares fname->name_len (a\ncharacter count) against e->size (a byte count) without accounting\nfor the 2-byte-per-character UTF-16LE encoding or the ATTR_FILE_NAME\nheader size:\nif (fname->name_len + sizeof(struct NTFS_DE) > le16_to_cpu(e->size))\nThis computes: name_len + 16 > e_size\nThe correct check must account for the ATTR_FILE_NAME header (66 bytes\nbefore the name) and the UTF-16LE character size (2 bytes each):\nsizeof(NTFS_DE) + offsetof(ATTR_FILE_NAME, name) +\nname_len * sizeof(short) > e_size\nWhich computes: 16 + 66 + name_len * 2 > e_size\nThe correct calculation already exists as fname_full_size() in ntfs.h\nand is used in cmp_fnames(), namei.c, and fslog.c, but was not used\nin the readdir path.\nA crafted NTFS image with an index entry containing a small e->size\nbut large fname->name_len bypasses the current check, causing\nntfs_utf16_to_nls() to read past the entry boundary.\nAdditionally, add a key_size validation in hdr_find_e() to ensure the\ndeclared key_size does not exceed the available entry data, preventing\ncomparison functions from reading past entry boundaries on the lookup\npath.", "A flaw was found in the Linux kernel's ntfs3 file system driver. Improper bounds checking during directory reading and index lookups can lead to an out-of-bounds memory read. A local attacker could exploit this vulnerability by mounting a specially crafted NTFS image, which could crash the system and cause a Denial of Service (DoS) or potentially disclose sensitive kernel memory."], "name": "CVE-2026-97437", "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"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not affected", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not affected", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-09-24T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-97437\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-97437\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-97437.mbox"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,ed6da1abeec50db9060d714f03743fe0b63e4fe4)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,6a8149a20e46086c756c2a9202e377c0b649a0c3)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,aa1bdbb39f49c5bc9779316891c40005517842a5)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,6.12.111)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,6.18.53)"}}], "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": "unaffected", "versions": {"scheme": "generic", "value": "[6.12.111,6.12.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.18.53,6.18.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2,*]"}}], "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": "2026-09-24T22:45:18.536511+00:00", "updated": "2026-10-01T13:00:07.637535+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-120", "CWE-125"]}