{"id":"CVE-2026-72478","revision":"404b6ce4381340c98ae654c21f300bce","records":[{"revision":"404b6ce4381340c98ae654c21f300bce","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-72478","aliases":[],"title":"fs/ntfs3: add bounds check to run_get_highest_vcn()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nfs/ntfs3: add bounds check to run_get_highest_vcn()\n\nrun_get_highest_vcn() parses a packed NTFS mapping-pairs buffer without\nany length bound, relying solely on a 0x00 terminator to stop.  A\ncrafted $LogFile UpdateMappingPairs record whose embedded attribute\ncontains mapping-pairs runs without a terminator causes the function to\nread past the slab allocation, triggering a KASAN slab-out-of-bounds\nread on mount.\n\nThe sibling function run_unpack() received an analogous bounds-check in\ncommit b62567bca474 (\"ntfs3: add buffer boundary checks to run_unpack()\"),\nbut run_get_highest_vcn() was missed.\n\nTake a run_buf_size parameter and reject any run header whose payload\nwould extend past the buffer end, mirroring the pattern used by\nrun_unpack().  The caller in fslog.c passes the remaining attribute\nbytes after the mapping-pairs offset.\n\nKASAN report (on mainline v7.1 merge window HEAD):\n\n  BUG: KASAN: slab-out-of-bounds in run_get_highest_vcn+0x3c0/0x410\n  Read of size 1 at addr ffff88800e2d5400 by task mount/72\n  Call Trace:\n   run_get_highest_vcn+0x3c0/0x410\n   do_action.isra.0+0x3ba8/0x7b50\n   log_replay+0x9ddd/0x10200\n   ntfs_loadlog_and_replay+0x4ad/0x610\n   ntfs_fill_super+0x214a/0x4540","state":0,"publishedAt":"2026-08-15T05:57:17.679+00:00","modifiedAt":"2026-10-16T18:55:26.034+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"fs/ntfs3/fslog.c\",\n                        \"fs/ntfs3/ntfs_fs.h\",\n                        \"fs/ntfs3/run.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"425de2aba0d061b3e715d51a3b1992c112ed5b99\",\n                            \"lessThan\": \"c69b9003332917b652175d5fa9d84158c5ed8617\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"bf7ac4a1d3bfc6e56e54635c3d331a68170d37c9\",\n                            \"lessThan\": \"8afc24a884aff6a6f08028bd779ee65c40054455\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"e64f7dfcaff79e7dfff9121a382dd77f9b462f62\",\n                            \"lessThan\": \"c23083b472a720c3f60b147db05b25b751c7c1bf\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"d3012690a7065d9ca86521a525ad11e8af491d45\",\n                            \"lessThan\": \"a31893206588374d7d16fad387189d8165c7efd3\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"b62567bca47408e6739dee75f02a2113548af875\",\n                            \"lessThan\": \"41081202eb823f5b27ff164b12010b24428100ad\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"b62567bca47408e6739dee75f02a2113548af875\",\n                            \"lessThan\": \"bb11485a87fbb2254b62cfed630b699d50e57da8\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"bbad75336870b51b81979b97613746237fcb02fe\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"41aadf5cb482793a24e05aa136224e179a778586\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"6.1.175\",\n                            \"lessThan\": \"6.1.178\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.140\",\n                            \"lessThan\": \"6.6.145\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.86\",\n                            \"lessThan\": \"6.12.97\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.27\",\n                            \"lessThan\": \"6.18.40\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.209\",\n                            \"lessThan\": \"5.16\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.0.4\",\n                            \"lessThan\": \"7.1\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"fs/ntfs3/fslog.c\",\n                        \"fs/ntfs3/ntfs_fs.h\",\n                        \"fs/ntfs3/run.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"7.1\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"7.1\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.178\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.145\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.97\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.40\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.1.5\",\n                            \"lessThanOrEqual\": \"7.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":8.4,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/c69b9003332917b652175d5fa9d84158c5ed8617","https://git.kernel.org/stable/c/8afc24a884aff6a6f08028bd779ee65c40054455","https://git.kernel.org/stable/c/c23083b472a720c3f60b147db05b25b751c7c1bf","https://git.kernel.org/stable/c/a31893206588374d7d16fad387189d8165c7efd3","https://git.kernel.org/stable/c/41081202eb823f5b27ff164b12010b24428100ad","https://git.kernel.org/stable/c/bb11485a87fbb2254b62cfed630b699d50e57da8"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-72478","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-72478","identifiers":["CVE-2026-72478"]},"retained":false,"historicalAffected":[]}],"coverage":[]}