VulnerabilityModified
CVE-2018-1092
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…
MEDIUM 5.5EPSS 1.85%
Does this matter?
Lower severity and a low EPSS score (1.85%). Track it; it rarely justifies an emergency change on its own.
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 3.0
- 5.5 MEDIUMCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- EPSS
- 1.85% probability · 78th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-476
- Affected
- linux/linux kernel
- Source
- secalert@redhat.com
References
- http://openwall.com/lists/oss-security/2018/03/29/1Mailing List, Third 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 Tracking, Third Party Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git/commit/?id=8e4b5eae5decd9dfe5a4ee369c22028f90ab4c44Patch
- 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/
- https://usn.ubuntu.com/3678-3/
- https://usn.ubuntu.com/3678-4/
- https://usn.ubuntu.com/3754-1/
- https://www.debian.org/security/2018/dsa-4187
- https://www.debian.org/security/2018/dsa-4188
- http://openwall.com/lists/oss-security/2018/03/29/1Mailing List, Third 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 Tracking, Third Party Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git/commit/?id=8e4b5eae5decd9dfe5a4ee369c22028f90ab4c44Patch
- https://lists.debian.org/debian-lts-announce/2018/05/msg00000.html
- https://usn.ubuntu.com/3676-1/
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.