Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | <= 4.15.15 |
Related Weaknesses (CWE)
References
- http://openwall.com/lists/oss-security/2018/03/29/1Mailing ListThird Party Advisory
- https://access.redhat.com/errata/RHSA-2018:2948
- https://access.redhat.com/errata/RHSA-2018:3083
- https://access.redhat.com/errata/RHSA-2018:3096
- https://bugzilla.kernel.org/show_bug.cgi?id=199179Issue Tracking
- https://bugzilla.kernel.org/show_bug.cgi?id=199275Issue Tracking
- https://bugzilla.redhat.com/show_bug.cgi?id=1560777Issue TrackingThird Party Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git/commit/?id=8e4b5ePatch
- https://lists.debian.org/debian-lts-announce/2018/05/msg00000.html
- https://usn.ubuntu.com/3676-1/
- https://usn.ubuntu.com/3676-2/
- https://usn.ubuntu.com/3677-1/
- https://usn.ubuntu.com/3677-2/
- https://usn.ubuntu.com/3678-1/
- https://usn.ubuntu.com/3678-2/
FAQ
What is CVE-2018-1092?
CVE-2018-1092 is a vulnerability with a CVSS score of 5.5 (MEDIUM). 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 (ex...
How severe is CVE-2018-1092?
CVE-2018-1092 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2018-1092?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.