CVE-2026-46078

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

References

• https://git.kernel.org/stable/c/1d55445226c75ddd4e78b09b3e7d99109b28c366
• https://git.kernel.org/stable/c/222055e6b4063abd2d9e13c3d49bbd1724c50789
• https://git.kernel.org/stable/c/48b27a955d22391c7f30169fa7b6b2e1977f1ce4
• https://git.kernel.org/stable/c/8ebb951a284b7446e025afc7dc5e9516ef9a7214
• https://git.kernel.org/stable/c/d18a3b5d337fa412a38e776e6b4b857a58836575