erofs: fix the out-of-bounds nameoff handling for trailing dirents
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
CVE-2026-46078
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-46078
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "3aa8ec716e52c02360457fa018296629b4d0becf",
"lessThan": "a8ee527807f7d97e55ce2ef2906f7f34975eb1c7",
"versionType": "git"
},
{
"status": "affected",
"version": "3aa8ec716e52c02360457fa018296629b4d0becf",
"lessThan": "aa16dca1b062355181ef215229eeac249d7c0d61",
"versionType": "git"
},
{
"status": "affected",
"version": "3aa8ec716e52c02360457fa018296629b4d0becf",
"lessThan": "80a23c6d1aba35be8746d74ac14e6ba5ae46da21",
"versionType": "git"
},
{
"status": "affected",
"version": "3aa8ec716e52c02360457fa018296629b4d0becf",
"lessThan": "222055e6b4063abd2d9e13c3d49bbd1724c50789",
"versionType": "git"
},
{
"status": "affected",
"version": "3aa8ec716e52c02360457fa018296629b4d0becf",
"lessThan": "48b27a955d22391c7f30169fa7b6b2e1977f1ce4",
"versionType": "git"
},
{
"status": "affected",
"version": "3aa8ec716e52c02360457fa018296629b4d0becf",
"lessThan": "8ebb951a284b7446e025afc7dc5e9516ef9a7214",
"versionType": "git"
},
{
"status": "affected",
"version": "3aa8ec716e52c02360457fa018296629b4d0becf",
"lessThan": "1d55445226c75ddd4e78b09b3e7d99109b28c366",
"versionType": "git"
},
{
"status": "affected",
"version": "3aa8ec716e52c02360457fa018296629b4d0becf",
"lessThan": "d18a3b5d337fa412a38e776e6b4b857a58836575",
"versionType": "git"
}
],
"programFiles": [
"fs/erofs/dir.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.19"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.19",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.259",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.210",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.175",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.140",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.86",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.27",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.0.4",
"versionType": "semver",
"lessThanOrEqual": "7.0.*"
},
{
"status": "unaffected",
"version": "7.1",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"fs/erofs/dir.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-46078
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #40114 · Revision 1
- Added to Heist Feed
- Publisher date