CVE-2022-49343 Information

Description

In the Linux kernel the following vulnerability has been resolved:

ext4: avoid cycles in directory h-tree

A maliciously corrupted filesystem can contain cycles in the h-tree stored inside a directory. That can easily lead to the kernel corrupting tree nodes that were already verified under its hands while doing a node split and consequently accessing unallocated memory. Fix the problem by verifying traversed block numbers are unique.

Reference

https://git.kernel.org/stable/c/24b8206fec1db21d7e82f21f0b2ff5e5672cf5b3 https://git.kernel.org/stable/c/3a3ce941645407cd0b0b7f01ad9e2ea3770f46cc https://git.kernel.org/stable/c/3ba733f879c2a88910744647e41edeefbc0d92b2 https://git.kernel.org/stable/c/6084240bfc44bf265ab6ae7d96980469b05be0f1 https://git.kernel.org/stable/c/b3ad9ff6f06c1dc6abf7437691c88ca3d6da3ac0 https://git.kernel.org/stable/c/d5a16a6df2c16eaf4de04948553ef0089dee463f https://git.kernel.org/stable/c/e157c8f87e8fac112d6c955e69a60cdb9bc80a60 https://git.kernel.org/stable/c/ff4cafa51762da3824881a9000ca421d4b78b138