CVE-2018-1094

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.

• CWE-476

• http://openwall.com/lists/oss-security/2018/03/29/1Mailing List, Third Party Advisory
• https://access.redhat.com/errata/RHSA-2018:2948Third Party Advisory
• https://access.redhat.com/errata/RHSA-2018:3083Third Party Advisory
• https://access.redhat.com/errata/RHSA-2018:3096Third Party Advisory
• https://bugzilla.kernel.org/show_bug.cgi?id=199183Exploit, Issue Tracking
• https://bugzilla.redhat.com/show_bug.cgi?id=1560788Issue Tracking, Third Party Advisory
• https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git/commit/?id=18db4b4e6fc31eda838dd1c1296d67dbcb3dc957Third Party Advisory
• https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git/commit/?id=a45403b51582a87872927a3e0fc0a389c26867f1Patch
• https://usn.ubuntu.com/3695-1/Third Party Advisory
• https://usn.ubuntu.com/3695-2/Third Party Advisory
• http://openwall.com/lists/oss-security/2018/03/29/1Mailing List, Third Party Advisory
• https://access.redhat.com/errata/RHSA-2018:2948Third Party Advisory
• https://access.redhat.com/errata/RHSA-2018:3083Third Party Advisory
• https://access.redhat.com/errata/RHSA-2018:3096Third Party Advisory
• https://bugzilla.kernel.org/show_bug.cgi?id=199183Exploit, Issue Tracking
• https://bugzilla.redhat.com/show_bug.cgi?id=1560788Issue Tracking, Third Party Advisory
• https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git/commit/?id=18db4b4e6fc31eda838dd1c1296d67dbcb3dc957Third Party Advisory
• https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git/commit/?id=a45403b51582a87872927a3e0fc0a389c26867f1Patch
• https://usn.ubuntu.com/3695-1/Third Party Advisory
• https://usn.ubuntu.com/3695-2/Third Party Advisory

Published

Apr 2, 2018

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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