{"id":"CVE-2026-89779","revision":"30166e93d82242fc8d3d249aab057f53","records":[{"revision":"30166e93d82242fc8d3d249aab057f53","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-89779","aliases":[],"title":"fs/ntfs3: validate ef->size covers the record's name and value","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nfs/ntfs3: validate ef->size covers the record's name and value\n\nWhen an EA record has a non-zero ef->size, ntfs_read_ea() only checks\nthat the record fits in the remaining buffer (ea_size > bytes), not that\nef->size is large enough to hold the record's own name_len + 1 + elength.\n\nA crafted image can pass validation with, e.g., ef->size = 24 but\nelength = 0xffff. ntfs_get_ea() then trusts elength and copies it out of\nthe undersized record, reading past the kmalloc(info->size) allocation\nand leaking heap memory to userspace via getxattr():\n\n BUG: KASAN: slab-out-of-bounds in ntfs_get_ea (fs/ntfs3/xattr.c:302)\n Read of size 65535 at addr ffff888100794550 by task exploit\n __asan_memcpy (mm/kasan/shadow.c:105)\n ntfs_get_ea (fs/ntfs3/xattr.c:302)\n ntfs_getxattr (fs/ntfs3/xattr.c:848)\n __vfs_getxattr (fs/xattr.c:441)\n vfs_getxattr (fs/xattr.c:474)\n do_getxattr (fs/xattr.c:800)\n path_getxattrat (fs/xattr.c:868)\n do_syscall_64 (arch/x86/entry/syscall_64.c:94)\n\n The buggy address is located 80 bytes inside of\n allocated 84-byte region in cache kmalloc-96\n\nCompute the size the record needs and require ef->size to cover it.","state":0,"publishedAt":"2026-09-16T08:48:19.083+00:00","modifiedAt":"2026-10-19T08:52:31.49+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/xattr.c\"\n ],\n \"versions\": [\n {\n \"version\": \"333feb7ba84f69f9b423422417aaac54fd9e7c84\",\n \"lessThan\": \"b27e68ad818a4ca2cef8f35f97e75d756714c818\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"000a9a72efa4a9df289bab9c9e8ba1639c72e0d6\",\n \"lessThan\": \"28a924c7e67e6d71abeb04860b61166fecb027fc\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"0e8235d28f3a0e9eda9f02ff67ee566d5f42b66b\",\n \"lessThan\": \"d585ed08308909c7e6fefb4e8a258aeb29b19ff9\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"0e8235d28f3a0e9eda9f02ff67ee566d5f42b66b\",\n \"lessThan\": \"077df8464cf24f8ffc82fb6efec2ae600686e699\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"0e8235d28f3a0e9eda9f02ff67ee566d5f42b66b\",\n \"lessThan\": \"aab1880058ac767d3ea9388a9a7221c776c22c44\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"0e8235d28f3a0e9eda9f02ff67ee566d5f42b66b\",\n \"lessThan\": \"c8a109c9e23a2c7fd548473dde728b2cb8188146\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"0e8235d28f3a0e9eda9f02ff67ee566d5f42b66b\",\n \"lessThan\": \"c22f91d82cb9a29d22bdffdce6c803467984ad0c\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"5.15.121\",\n \"lessThan\": \"5.15.221\",\n \"status\": \"affected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.1.40\",\n \"lessThan\": \"6.1.188\",\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/xattr.c\"\n ],\n \"versions\": [\n {\n \"version\": \"6.2\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"6.2\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.15.221\",\n \"lessThanOrEqual\": \"5.15.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.1.188\",\n \"lessThanOrEqual\": \"6.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.6.157\",\n \"lessThanOrEqual\": \"6.6.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.12.110\",\n \"lessThanOrEqual\": \"6.12.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.18.52\",\n \"lessThanOrEqual\": \"6.18.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.2.6\",\n \"lessThanOrEqual\": \"7.2.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.3\",\n \"lessThanOrEqual\": \"*\",\n \"status\": \"unaffected\",\n \"versionType\": \"original_commit_for_fix\"\n }\n ]\n }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","score":9.1,"severity":"CRITICAL"}],"references":["https://git.kernel.org/stable/c/b27e68ad818a4ca2cef8f35f97e75d756714c818","https://git.kernel.org/stable/c/28a924c7e67e6d71abeb04860b61166fecb027fc","https://git.kernel.org/stable/c/d585ed08308909c7e6fefb4e8a258aeb29b19ff9","https://git.kernel.org/stable/c/077df8464cf24f8ffc82fb6efec2ae600686e699","https://git.kernel.org/stable/c/aab1880058ac767d3ea9388a9a7221c776c22c44","https://git.kernel.org/stable/c/c8a109c9e23a2c7fd548473dde728b2cb8188146","https://git.kernel.org/stable/c/c22f91d82cb9a29d22bdffdce6c803467984ad0c"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-89779","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-89779","identifiers":["CVE-2026-89779"]},"retained":false,"historicalAffected":[]}],"coverage":[]}