CVE-2018-1092

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.

Category

5.5
CVSS
Severity: Medium
CVSS 3.0 •
CVSS 2.0 •
EPSS 0.10%
Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory redhat.com Vendor Advisory debian.org Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory debian.org Vendor Advisory ubuntu.com Vendor Advisory redhat.com Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory redhat.com Vendor Advisory ubuntu.com
Affected: n/a Linux kernel through version 4.15
Published at:
Updated at:

References

Link Tags
https://usn.ubuntu.com/3676-1/ vendor advisory
https://usn.ubuntu.com/3678-2/ vendor advisory
https://access.redhat.com/errata/RHSA-2018:3083 vendor advisory
http://openwall.com/lists/oss-security/2018/03/29/1 third party advisory mailing list
https://www.debian.org/security/2018/dsa-4187 vendor advisory
https://usn.ubuntu.com/3678-1/ vendor advisory
https://usn.ubuntu.com/3677-1/ vendor advisory
https://www.debian.org/security/2018/dsa-4188 vendor advisory
https://usn.ubuntu.com/3754-1/ vendor advisory
https://bugzilla.kernel.org/show_bug.cgi?id=199179 issue tracking
https://access.redhat.com/errata/RHSA-2018:2948 vendor advisory
https://usn.ubuntu.com/3678-3/ vendor advisory
https://usn.ubuntu.com/3677-2/ vendor advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1560777 issue tracking third party advisory
https://usn.ubuntu.com/3676-2/ vendor advisory
https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git/commit/?id=8e4b5eae5decd9dfe5a4ee369c22028f90ab4c44 patch
https://lists.debian.org/debian-lts-announce/2018/05/msg00000.html mailing list
https://access.redhat.com/errata/RHSA-2018:3096 vendor advisory
https://usn.ubuntu.com/3678-4/ vendor advisory
https://bugzilla.kernel.org/show_bug.cgi?id=199275 issue tracking

Frequently Asked Questions

What is the severity of CVE-2018-1092?
CVE-2018-1092 has been scored as a medium severity vulnerability.
How to fix CVE-2018-1092?
To fix CVE-2018-1092, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2018-1092 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2018-1092 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2018-1092?
CVE-2018-1092 affects n/a Linux kernel through version 4.15.
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