Description
The ext4_fill_super 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 (ext4_xattr_inode_hash NULL pointer dereference and system crash) via a crafted ext4 image.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
n/a Linux kernel through version 4.15
Linux kernel through version 4.15affected
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1560788 ↗
- https://access.redhat.com/errata/RHSA-2018:3083 ↗
- https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git/commit/?id=18db4b4e6fc31eda838dd1c1296d67dbcb3dc957 ↗
- http://openwall.com/lists/oss-security/2018/03/29/1 ↗
- https://usn.ubuntu.com/3695-1/ ↗
- https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git/commit/?id=a45403b51582a87872927a3e0fc0a389c26867f1 ↗
- https://usn.ubuntu.com/3695-2/ ↗
- https://bugzilla.kernel.org/show_bug.cgi?id=199183 ↗
- https://access.redhat.com/errata/RHSA-2018:2948 ↗
- https://access.redhat.com/errata/RHSA-2018:3096 ↗