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
Affected products
linux: linux kernel
References8
- git.kernel.org/stable/c/1d55445226c75ddd4e78b09b3e7d99109b28c366 Patch
- git.kernel.org/stable/c/222055e6b4063abd2d9e13c3d49bbd1724c50789 Patch
- git.kernel.org/stable/c/48b27a955d22391c7f30169fa7b6b2e1977f1ce4 Patch
- git.kernel.org/stable/c/80a23c6d1aba35be8746d74ac14e6ba5ae46da21 Patch
- git.kernel.org/stable/c/8ebb951a284b7446e025afc7dc5e9516ef9a7214 Patch
- git.kernel.org/stable/c/a8ee527807f7d97e55ce2ef2906f7f34975eb1c7 Patch
- git.kernel.org/stable/c/aa16dca1b062355181ef215229eeac249d7c0d61 Patch
- git.kernel.org/stable/c/d18a3b5d337fa412a38e776e6b4b857a58836575 Patch
Metrics
- CVSS 3.1
-
7.1
HIGH
Score source: CNA
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H - EPSS — exploit probability
- 0% percentile: 3 · as of 14 November 2026
- CWE
- CWE-125
Could this be exploited in your environment?
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