{"id":"CVE-2026-46078","title":"erofs: fix the out-of-bounds nameoff handling for trailing dirents","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nerofs: fix the out-of-bounds nameoff handling for trailing dirents\n\nCurrently we already have boundary-checks for nameoffs, but the trailing\ndirents are special since t…","severity":"high","cvss":7.1,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H","cvssSource":"cna","vendor":"Linux","product":"Linux","affected":["Linux >= 3aa8ec716e52c02360457fa018296629b4d0becf < a8ee527807f7d97e55ce2ef2906f7f34975eb1c7","Linux >= 3aa8ec716e52c02360457fa018296629b4d0becf < aa16dca1b062355181ef215229eeac249d7c0d61","Linux >= 3aa8ec716e52c02360457fa018296629b4d0becf < 80a23c6d1aba35be8746d74ac14e6ba5ae46da21","Linux >= 3aa8ec716e52c02360457fa018296629b4d0becf < 222055e6b4063abd2d9e13c3d49bbd1724c50789","Linux >= 3aa8ec716e52c02360457fa018296629b4d0becf < 48b27a955d22391c7f30169fa7b6b2e1977f1ce4","Linux >= 3aa8ec716e52c02360457fa018296629b4d0becf < 8ebb951a284b7446e025afc7dc5e9516ef9a7214","Linux >= 3aa8ec716e52c02360457fa018296629b4d0becf < 1d55445226c75ddd4e78b09b3e7d99109b28c366","Linux >= 3aa8ec716e52c02360457fa018296629b4d0becf < d18a3b5d337fa412a38e776e6b4b857a58836575","Linux 4.19"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-16T15:19:29.931334Z"},"published":"2026-05-27","updated":"2026-10-16","sourceUpdated":"2026-10-16T15:20:50.333Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-46078","references":[{"url":"https://git.kernel.org/stable/c/a8ee527807f7d97e55ce2ef2906f7f34975eb1c7"},{"url":"https://git.kernel.org/stable/c/aa16dca1b062355181ef215229eeac249d7c0d61"},{"url":"https://git.kernel.org/stable/c/80a23c6d1aba35be8746d74ac14e6ba5ae46da21"},{"url":"https://git.kernel.org/stable/c/222055e6b4063abd2d9e13c3d49bbd1724c50789"},{"url":"https://git.kernel.org/stable/c/48b27a955d22391c7f30169fa7b6b2e1977f1ce4"},{"url":"https://git.kernel.org/stable/c/8ebb951a284b7446e025afc7dc5e9516ef9a7214"},{"url":"https://git.kernel.org/stable/c/1d55445226c75ddd4e78b09b3e7d99109b28c366"},{"url":"https://git.kernel.org/stable/c/d18a3b5d337fa412a38e776e6b4b857a58836575"}],"tags":["cve.org"],"epss":0.00131,"epssPercentile":0.02417,"ingestedAt":"2026-10-16T17:24:46.705Z","slug":"CVE-2026-46078","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nerofs: fix the out-of-bounds nameoff handling for trailing dirents\n\nCurrently we already have boundary-checks for nameoffs, but the trailing\ndirents are special since the namelens are calculated with strnlen()\nwith unchecked nameoffs.\n\nIf a crafted EROFS has a trailing dirent with nameoff >= maxsize,\nmaxsize - nameoff can underflow, causing strnlen() to read past the\ndirectory block.\n\nnameoff0 should also be verified to be a multiple of\n`sizeof(struct erofs_dirent)` as well [1].\n\n[1] https://sashiko.dev/#/patchset/20260416063511.3173774-1-hsiangkao%40linux.alibaba.com\n\n## Affected\n\n- `Linux >= 3aa8ec716e52c02360457fa018296629b4d0becf < a8ee527807f7d97e55ce2ef2906f7f34975eb1c7`\n- `Linux >= 3aa8ec716e52c02360457fa018296629b4d0becf < aa16dca1b062355181ef215229eeac249d7c0d61`\n- `Linux >= 3aa8ec716e52c02360457fa018296629b4d0becf < 80a23c6d1aba35be8746d74ac14e6ba5ae46da21`\n- `Linux >= 3aa8ec716e52c02360457fa018296629b4d0becf < 222055e6b4063abd2d9e13c3d49bbd1724c50789`\n- `Linux >= 3aa8ec716e52c02360457fa018296629b4d0becf < 48b27a955d22391c7f30169fa7b6b2e1977f1ce4`\n- `Linux >= 3aa8ec716e52c02360457fa018296629b4d0becf < 8ebb951a284b7446e025afc7dc5e9516ef9a7214`\n- `Linux >= 3aa8ec716e52c02360457fa018296629b4d0becf < 1d55445226c75ddd4e78b09b3e7d99109b28c366`\n- `Linux >= 3aa8ec716e52c02360457fa018296629b4d0becf < d18a3b5d337fa412a38e776e6b4b857a58836575`\n- `Linux 4.19`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":39,"depthScoreParts":{"impact":39.1,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}