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CVE-2024-42306

In the Linux kernel, the following vulnerability has been resolved: udf: Avoid using corrupted block bitmap buffer When the filesystem block bitmap is corrupte…

Impact

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.

Affected products

VendorProductAffected versions
LinuxLinux Kernel
from 4.14.326 before 4.15
from 4.19.295 before 4.20
from 5.4.257 before 5.4.282
from 5.10.195 before 5.10.224
from 5.15.132 before 5.15.165
from 6.1.53 before 6.1.103

References