GHSA-75M6-V57W-MHQ4
Vulnerability from github – Published: 2026-09-17 18:31 – Updated: 2026-09-18 18:31In the Linux kernel, the following vulnerability has been resolved:
erofs: fix interlaced ztailpacking pclusters
On-disk sizes of interlaced pclusters should be block-aligned, and ztailpacking interlaced pclusters should be invalid at all.
Currently, mkfs.erofs won't generate any interlaced pcluster with ztailpacking enabled, so this doesn't affect any existing valid filesystems.
However, crafted images can contain invalid interlaced ztailpacking pclusters, resulting in an out-of-bounds read from a kmap'd page and copying irrelevant kernel memory into userspace-visible page cache.
{
"affected": [],
"aliases": [
"CVE-2026-90161"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-17T17:17:09Z",
"severity": "HIGH"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nerofs: fix interlaced ztailpacking pclusters\n\nOn-disk sizes of interlaced pclusters should be block-aligned, and\nztailpacking interlaced pclusters should be invalid at all.\n\nCurrently, mkfs.erofs won\u0027t generate any interlaced pcluster with\nztailpacking enabled, so this doesn\u0027t affect any existing valid\nfilesystems.\n\nHowever, crafted images can contain invalid interlaced ztailpacking\npclusters, resulting in an out-of-bounds read from a kmap\u0027d page and\ncopying irrelevant kernel memory into userspace-visible page cache.",
"id": "GHSA-75m6-v57w-mhq4",
"modified": "2026-09-18T18:31:27Z",
"published": "2026-09-17T18:31:53Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-90161"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/451027c642e752420e1a04237db9ce7b35cee595"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/862427ebb81d1f6abbf74d799790e1694b37b187"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/ddb7ea4fd99bf6c4314d1dfca18aec6945ce8054"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H",
"type": "CVSS_V3"
}
]
}
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