CVE-2022-49553 Information

Description

In the Linux kernel the following vulnerability has been resolved:

fs/ntfs3: validate BOOT sectors_per_clusters

When the NTFS BOOT sectors_per_clusters field is > 0x80 it represents a shift value. Make sure that the shift value is not too large before using it (NTFS max cluster size is 2MB). Return -EVINVAL if it too large.

This prevents negative shift values and shift values that are larger than the field size.

Prevents this UBSAN error:

UBSAN: shift-out-of-bounds in ../fs/ntfs3/super.c:673:16 shift exponent -192 is negative

Reference

https://git.kernel.org/stable/c/4746c49b11b2403f5b5b07c6eac9e60663dcd9a3 https://git.kernel.org/stable/c/58cf68a1886d14ffdc5c892ce483a82156769e88 https://git.kernel.org/stable/c/a2b6986316a2d106f6951e76db70fa4b2fde64a9 https://git.kernel.org/stable/c/a3b774342fa752a5290c0de36375289dfcf4a260