CVE-2024-42306 Information

Description

In the Linux kernel the following vulnerability has been resolved:

udf: Avoid using corrupted block bitmap buffer

When the filesystem block bitmap is corrupted we detect the corruption while loading the bitmap and fail the allocation with error. However the next allocation from the same bitmap will notice the bitmap buffer is already loaded and tries to allocate from the bitmap with mixed results (depending on the exact nature of the bitmap corruption). Fix the problem by using BH_verified bit to indicate whether the bitmap is valid or not.

Reference

https://git.kernel.org/stable/c/271cab2ca00652bc984e269cf1208699a1e09cdd https://git.kernel.org/stable/c/57053b3bcf3403b80db6f65aba284d7dfe7326af https://git.kernel.org/stable/c/8ca170c39eca7cad6e0cfeb24e351d8f8eddcd65 https://git.kernel.org/stable/c/a90d4471146de21745980cba51ce88e7926bcc4f