{"id":"CVE-2026-72195","revision":"71fafc822b20457ab8ef75d12d9237d2","records":[{"revision":"71fafc822b20457ab8ef75d12d9237d2","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-72195","aliases":[],"title":"fs/ntfs3: bound attr_off in UpdateResidentValue against data_off","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nfs/ntfs3: bound attr_off in UpdateResidentValue against data_off\n\nIn do_action()'s UpdateResidentValue case (fslog.c:3307),\nlrh->attr_off and lrh->redo_len come from the on-disk LRH.\nWhen they satisfy aoff + dlen < attr->res.data_off, the\nassignment\n\n\tattr->res.data_size = cpu_to_le32(aoff + dlen - data_off);\n\nunderflows to ~4 GiB (e.g. 0xFFFFFFF9 when aoff=0x10, dlen=1,\ndata_off=0x18).  Subsequent code that reads attr->res.data_size\nto walk the resident attribute payload would then read up to\n4 GiB past the 1024-byte MFT record allocation.\n\nThe existing mi_enum_attr() defense in fs/ntfs3/record.c:287\ncatches the corrupted data_size on the next attribute walk\nand fails the mount, but only on the path that walks all\nattributes.  A read site that picks an attribute by name and\nreads its data_size without re-validating is not covered.\nValidate aoff against data_off and asize at the source.\n\nReproduced under UML+KASAN on mainline 8d90b09e6741 via\npr_warn-only probe: with aoff=0x10 and data_off=0x18, the\npost-assignment data_size is 0xfffffff9 (mount then fails\nat -22 from mi_enum_attr).\n\n[almaz.alexandrovich@paragon-software.com: clang-formatted the changes]","state":0,"publishedAt":"2026-08-15T05:53:54.869+00:00","modifiedAt":"2026-10-16T18:45:01.278+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                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"b46acd6a6a627d876898e1c84d3f84902264b445\",\n                            \"lessThan\": \"ab8761676d638c5be170aaf91b7ffdd451236616\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"b46acd6a6a627d876898e1c84d3f84902264b445\",\n                            \"lessThan\": \"53c12f178f584dc5f836ffe2782138a6e9348ed9\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"b46acd6a6a627d876898e1c84d3f84902264b445\",\n                            \"lessThan\": \"546518468e6c9ea469669eef78f8cc380ad6e2ca\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"b46acd6a6a627d876898e1c84d3f84902264b445\",\n                            \"lessThan\": \"97758fd9756b5f09e9ddc6a5f6a569041acc8421\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"b46acd6a6a627d876898e1c84d3f84902264b445\",\n                            \"lessThan\": \"50b5e83384e7fed3d11d18b79ff350e9d6d89861\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"b46acd6a6a627d876898e1c84d3f84902264b445\",\n                            \"lessThan\": \"a89c66674283a0293c0f266dc57087a6114371a3\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"b46acd6a6a627d876898e1c84d3f84902264b445\",\n                            \"lessThan\": \"d1570c48f49a693974d000251030370ee2e83539\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\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                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"5.15\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"5.15\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.212\",\n                            \"lessThanOrEqual\": \"5.15.*\",\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:L/UI:N/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/ab8761676d638c5be170aaf91b7ffdd451236616","https://git.kernel.org/stable/c/53c12f178f584dc5f836ffe2782138a6e9348ed9","https://git.kernel.org/stable/c/546518468e6c9ea469669eef78f8cc380ad6e2ca","https://git.kernel.org/stable/c/97758fd9756b5f09e9ddc6a5f6a569041acc8421","https://git.kernel.org/stable/c/50b5e83384e7fed3d11d18b79ff350e9d6d89861","https://git.kernel.org/stable/c/a89c66674283a0293c0f266dc57087a6114371a3","https://git.kernel.org/stable/c/d1570c48f49a693974d000251030370ee2e83539"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-72195","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-72195","identifiers":["CVE-2026-72195"]},"retained":false,"historicalAffected":[]}],"coverage":[]}