{"id":"CVE-2026-89615","title":"fs/ntfs3: bound page_lcns[] index by the log record","summary":"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_f…","severity":"high","cvss":8.4,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cvssSource":"cna","cwe":["CWE-787"],"vendor":"Linux","product":"Linux","affected":["Linux >= b46acd6a6a627d876898e1c84d3f84902264b445 < 31fdd11f75da9823500168cecb07aa45130915a3","Linux >= b46acd6a6a627d876898e1c84d3f84902264b445 < bb742d1030864c0fe140666f639428ba4e90b2ca","Linux >= b46acd6a6a627d876898e1c84d3f84902264b445 < 61ca8cbbf68f77f25b699ed4358bd232f94ed43b","Linux >= b46acd6a6a627d876898e1c84d3f84902264b445 < f4c1bc6d7331f344ffcea93c2a37badcbe15baa6","Linux >= b46acd6a6a627d876898e1c84d3f84902264b445 < 7ccb94901f38a062034b56b43c774050b113758f","Linux >= b46acd6a6a627d876898e1c84d3f84902264b445 < 1135ebc225996b3ac1a295652b19a0a706737a6c","Linux >= b46acd6a6a627d876898e1c84d3f84902264b445 < 6f7b9dbdc1b7520206abce0049bdd143eb536e75","Linux 5.15"],"published":"2026-09-11","updated":"2026-10-19","sourceUpdated":"2026-10-19T08:49:47.839Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-89615","references":[{"url":"https://git.kernel.org/stable/c/31fdd11f75da9823500168cecb07aa45130915a3"},{"url":"https://git.kernel.org/stable/c/bb742d1030864c0fe140666f639428ba4e90b2ca"},{"url":"https://git.kernel.org/stable/c/61ca8cbbf68f77f25b699ed4358bd232f94ed43b"},{"url":"https://git.kernel.org/stable/c/f4c1bc6d7331f344ffcea93c2a37badcbe15baa6"},{"url":"https://git.kernel.org/stable/c/7ccb94901f38a062034b56b43c774050b113758f"},{"url":"https://git.kernel.org/stable/c/1135ebc225996b3ac1a295652b19a0a706737a6c"},{"url":"https://git.kernel.org/stable/c/6f7b9dbdc1b7520206abce0049bdd143eb536e75"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89615.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-89615"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532402"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-89615"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89615"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89615.mbox"}],"tags":["cve.org","csaf","vex","red-hat","score-dispute"],"epss":0.00152,"epssPercentile":0.04298,"scores":{"cna":8.4,"vendor":5.5},"ingestedAt":"2026-09-14T15:23:07.450Z","slug":"CVE-2026-89615","body":"## Overview\n\nIn 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]\n\n## Affected\n\n- `Linux >= b46acd6a6a627d876898e1c84d3f84902264b445 < 31fdd11f75da9823500168cecb07aa45130915a3`\n- `Linux >= b46acd6a6a627d876898e1c84d3f84902264b445 < bb742d1030864c0fe140666f639428ba4e90b2ca`\n- `Linux >= b46acd6a6a627d876898e1c84d3f84902264b445 < 61ca8cbbf68f77f25b699ed4358bd232f94ed43b`\n- `Linux >= b46acd6a6a627d876898e1c84d3f84902264b445 < f4c1bc6d7331f344ffcea93c2a37badcbe15baa6`\n- `Linux >= b46acd6a6a627d876898e1c84d3f84902264b445 < 7ccb94901f38a062034b56b43c774050b113758f`\n- `Linux >= b46acd6a6a627d876898e1c84d3f84902264b445 < 1135ebc225996b3ac1a295652b19a0a706737a6c`\n- `Linux >= b46acd6a6a627d876898e1c84d3f84902264b445 < 6f7b9dbdc1b7520206abce0049bdd143eb536e75`\n- `Linux 5.15`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · updated 2026-09-18 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89615.json)","depth":"twilight","depthScore":46,"depthScoreParts":{"impact":46.2,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":224663,"id":"CVE-2026-89615","ts":1792401466038,"field":"cvss","old":"5.5","new":"8.4"},{"seq":224662,"id":"CVE-2026-89615","ts":1792401466038,"field":"severity","old":"medium","new":"high"},{"seq":208085,"id":"CVE-2026-89615","ts":1789922706682,"field":"cvss","old":"8.4","new":"5.5"},{"seq":208084,"id":"CVE-2026-89615","ts":1789922706682,"field":"severity","old":"high","new":"medium"},{"seq":197849,"id":"CVE-2026-89615","ts":1789384320666,"field":"cvss","old":"6.7","new":"8.4"},{"seq":197848,"id":"CVE-2026-89615","ts":1789384320666,"field":"severity","old":"medium","new":"high"},{"seq":183416,"id":"CVE-2026-89615","ts":1789356675277,"field":"cvss","old":"8.4","new":"6.7"},{"seq":183415,"id":"CVE-2026-89615","ts":1789356675277,"field":"severity","old":"high","new":"medium"},{"seq":153448,"id":"CVE-2026-89615","ts":1789285350552,"field":"cvss","old":null,"new":"8.4"},{"seq":153447,"id":"CVE-2026-89615","ts":1789285350552,"field":"severity","old":"none","new":"high"},{"seq":147261,"id":"CVE-2026-89615","ts":1789270205232,"field":"cvss","old":null,"new":"6.7"},{"seq":147260,"id":"CVE-2026-89615","ts":1789270205232,"field":"severity","old":"none","new":"medium"},{"seq":109016,"id":"CVE-2026-89615","ts":1789183729962,"field":"cvss","old":null,"new":"6.7"},{"seq":109015,"id":"CVE-2026-89615","ts":1789183729962,"field":"severity","old":"none","new":"medium"}]}