{"id":"CVE-2026-89615","summary":"fs/ntfs3: bound page_lcns[] index by the log record","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nfs/ntfs3: bound page_lcns[] index by the log record\n\nThe copy_lcns loop and the redo shorten loop index page_lcns[] at j + i,\nwhere i runs up to the log record's lcns_follow. That count is checked only\nagainst the record's own length, not the target entry, so check_dp_table()\n(which validates the entry's lcns_follow) does not cover it: the copy_lcns\nentry may even be freshly allocated after that check, and find_dp() bounds j\nbut not i. A crafted record thus overflows page_lcns[] of an otherwise valid\nentry.\n\nAdd dp_range_ok() and reject, before each loop, any record whose run does\nnot fit the entry. These are the only two page_lcns[] accesses indexed by\nthe record rather than the entry, so together with the entry validation\nevery access is now bounded.\n\n[almaz.alexandrovich@paragon-software.com: original patch contained changes to the problem already handled, applied partly]","modified":"2026-09-14T03:46:18.814448908Z","published":"2026-09-11T19:45:15.397Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89615.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/1135ebc225996b3ac1a295652b19a0a706737a6c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6f7b9dbdc1b7520206abce0049bdd143eb536e75"},{"type":"WEB","url":"https://git.kernel.org/stable/c/7ccb94901f38a062034b56b43c774050b113758f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f4c1bc6d7331f344ffcea93c2a37badcbe15baa6"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89615.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89615"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"b46acd6a6a627d876898e1c84d3f84902264b445"},{"fixed":"f4c1bc6d7331f344ffcea93c2a37badcbe15baa6"},{"fixed":"7ccb94901f38a062034b56b43c774050b113758f"},{"fixed":"1135ebc225996b3ac1a295652b19a0a706737a6c"},{"fixed":"6f7b9dbdc1b7520206abce0049bdd143eb536e75"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-89615.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.15.0"},{"fixed":"6.12.109"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.50"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.2.4"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-89615.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}