The ext4fillsuper function in fs/ext4/super.c in the Linux kernel through 4.15.15 does not always initialize the crc32c checksum driver, which allows attackers to cause a denial of service (ext4xattrinode_hash NULL pointer dereference and system crash) via a crafted ext4 image.
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"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-1094.json"