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
Product status
3aa8ec716e52c02360457fa018296629b4d0becf (git) before 80a23c6d1aba35be8746d74ac14e6ba5ae46da21
3aa8ec716e52c02360457fa018296629b4d0becf (git) before 222055e6b4063abd2d9e13c3d49bbd1724c50789
3aa8ec716e52c02360457fa018296629b4d0becf (git) before 48b27a955d22391c7f30169fa7b6b2e1977f1ce4
3aa8ec716e52c02360457fa018296629b4d0becf (git) before 8ebb951a284b7446e025afc7dc5e9516ef9a7214
3aa8ec716e52c02360457fa018296629b4d0becf (git) before 1d55445226c75ddd4e78b09b3e7d99109b28c366
3aa8ec716e52c02360457fa018296629b4d0becf (git) before d18a3b5d337fa412a38e776e6b4b857a58836575
4.19
Any version before 4.19
6.1.175 (semver)
6.6.140 (semver)
6.12.86 (semver)
6.18.27 (semver)
7.0.4 (semver)
7.1-rc1 (original_commit_for_fix)
References
git.kernel.org/...c/80a23c6d1aba35be8746d74ac14e6ba5ae46da21
git.kernel.org/...c/222055e6b4063abd2d9e13c3d49bbd1724c50789
git.kernel.org/...c/48b27a955d22391c7f30169fa7b6b2e1977f1ce4
git.kernel.org/...c/8ebb951a284b7446e025afc7dc5e9516ef9a7214
git.kernel.org/...c/1d55445226c75ddd4e78b09b3e7d99109b28c366
git.kernel.org/...c/d18a3b5d337fa412a38e776e6b4b857a58836575