Description
The ext4_iget function in fs/ext4/inode.c in the Linux kernel through 4.15.15 mishandles the case of a root directory with a zero i_links_count, which allows attackers to cause a denial of service (ext4_process_freed_data NULL pointer dereference and OOPS) 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://usn.ubuntu.com/3676-1/ ↗
- https://usn.ubuntu.com/3678-2/ ↗
- https://access.redhat.com/errata/RHSA-2018:3083 ↗
- http://openwall.com/lists/oss-security/2018/03/29/1 ↗
- https://www.debian.org/security/2018/dsa-4187 ↗
- https://usn.ubuntu.com/3678-1/ ↗
- https://usn.ubuntu.com/3677-1/ ↗
- https://www.debian.org/security/2018/dsa-4188 ↗
- https://usn.ubuntu.com/3754-1/ ↗
- https://bugzilla.kernel.org/show_bug.cgi?id=199179 ↗
- https://access.redhat.com/errata/RHSA-2018:2948 ↗
- https://usn.ubuntu.com/3678-3/ ↗
- https://usn.ubuntu.com/3677-2/ ↗
- https://bugzilla.redhat.com/show_bug.cgi?id=1560777 ↗
- https://usn.ubuntu.com/3676-2/ ↗
- https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git/commit/?id=8e4b5eae5decd9dfe5a4ee369c22028f90ab4c44 ↗
- https://lists.debian.org/debian-lts-announce/2018/05/msg00000.html ↗
- https://access.redhat.com/errata/RHSA-2018:3096 ↗
- https://usn.ubuntu.com/3678-4/ ↗
- https://bugzilla.kernel.org/show_bug.cgi?id=199275 ↗