{"id":"CVE-2026-97437","title":"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 b…","summary":"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 b…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < ed6da1abeec50db9060d714f03743fe0b63e4fe4","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 6a8149a20e46086c756c2a9202e377c0b649a0c3","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < aa1bdbb39f49c5bc9779316891c40005517842a5","Linux < 6.12.111","Linux < 6.18.53","Linux (all versions)"],"published":"2026-09-24","updated":"2026-09-24","sourceUpdated":"2026-09-24T17:17:21.810","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-97437","references":[{"url":"https://git.kernel.org/stable/c/6a8149a20e46086c756c2a9202e377c0b649a0c3","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/aa1bdbb39f49c5bc9779316891c40005517842a5","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/ed6da1abeec50db9060d714f03743fe0b63e4fe4","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-24T16:47:15.879Z","slug":"CVE-2026-97437","body":"## Overview\n\nIn 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}