CVE-2018-1092

MEDIUM

Linux Kernel < 4.15.15 - Denial of Service via ext4_iget NULL Pointer Dereference

Title source: llm
STIX 2.1

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.

References (20)

Core 20
Core References
Vendor Advisory vendor-advisory x_refsource_ubuntu
https://usn.ubuntu.com/3676-1/
Vendor Advisory vendor-advisory x_refsource_ubuntu
https://usn.ubuntu.com/3678-2/
Vendor Advisory vendor-advisory x_refsource_redhat
https://access.redhat.com/errata/RHSA-2018:3083
Mailing List, Third Party Advisory x_refsource_misc
http://openwall.com/lists/oss-security/2018/03/29/1
Third Party Advisory vendor-advisory x_refsource_debian
https://www.debian.org/security/2018/dsa-4187
Vendor Advisory vendor-advisory x_refsource_ubuntu
https://usn.ubuntu.com/3678-1/
Vendor Advisory vendor-advisory x_refsource_ubuntu
https://usn.ubuntu.com/3677-1/
Third Party Advisory vendor-advisory x_refsource_debian
https://www.debian.org/security/2018/dsa-4188
Vendor Advisory vendor-advisory x_refsource_ubuntu
https://usn.ubuntu.com/3754-1/
Issue Tracking x_refsource_misc
https://bugzilla.kernel.org/show_bug.cgi?id=199179
Vendor Advisory vendor-advisory x_refsource_redhat
https://access.redhat.com/errata/RHSA-2018:2948
Vendor Advisory vendor-advisory x_refsource_ubuntu
https://usn.ubuntu.com/3678-3/
Vendor Advisory vendor-advisory x_refsource_ubuntu
https://usn.ubuntu.com/3677-2/
Issue Tracking, Third Party Advisory x_refsource_misc
https://bugzilla.redhat.com/show_bug.cgi?id=1560777
Vendor Advisory vendor-advisory x_refsource_ubuntu
https://usn.ubuntu.com/3676-2/
Mailing List mailing-list x_refsource_mlist
https://lists.debian.org/debian-lts-announce/2018/05/msg00000.html
Vendor Advisory vendor-advisory x_refsource_redhat
https://access.redhat.com/errata/RHSA-2018:3096
Vendor Advisory vendor-advisory x_refsource_ubuntu
https://usn.ubuntu.com/3678-4/
Issue Tracking x_refsource_misc
https://bugzilla.kernel.org/show_bug.cgi?id=199275

Scores

CVSS v3 5.5
EPSS 0.0200
EPSS Percentile 78.3%
Attack Vector LOCAL
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Details

CWE
CWE-476
Status published
Products (1)
linux/linux_kernel < 4.15.15
Published Apr 02, 2018
Tracked Since Feb 18, 2026