Denial of Service Vulnerability in Linux Kernel's journal_unmap_buffer Function

CVE-2011-4086 · MEDIUM Severity

AV:L/AC:L/AU:N/C:N/I:N/A:C

The journal_unmap_buffer function in fs/jbd2/transaction.c in the Linux kernel before 3.3.1 does not properly handle the _Delay and _Unwritten buffer head states, which allows local users to cause a denial of service (system crash) by leveraging the presence of an ext4 filesystem that was mounted with a journal.

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