CVE-2026-46078
Full vulnerability record from the local CVENow database.
Description
In the Linux kernel, the following vulnerability has been resolved: erofs: fix the out-of-bounds nameoff handling for trailing dirents Currently we already have boundary-checks for nameoffs, but the trailing dirents are special since the namelens are calculated with strnlen() with unchecked nameoffs. If a crafted EROFS has a trailing dirent with nameoff >= maxsize, maxsize - nameoff can underflow, causing strnlen() to read past the directory block. nameoff0 should also be verified to be a multiple of `sizeof(struct erofs_dirent)` as well [1]. [1] https://sashiko.dev/#/patchset/20260416063511.3173774-1-hsiangkao%40linux.alibaba.com
Severity
HIGH
CVSS score
7.1
(v3.1)
Vulnerability status
Undergoing Analysis
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2026-05-27 14:17:29.143000
Last modified
2026-10-19 20:18:28.757000
View original CVE JSON
{
"id": "CVE-2026-46078",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2026-05-27T14:17:29.143",
"lastModified": "2026-10-19T20:18:28.757",
"vulnStatus": "Undergoing Analysis",
"cveTags": [],
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"value": "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 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"
}
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