Information disclosure in Kernel Vhost
CVE-2018-1118
Linux kernel vhost since version 4.8 does not properly initialize memory in messages passed between virtual guests and the host operating system in the vhost/vhost.c:vhost_new_msg() function. This can allow local privileged users to read some kernel memory contents when reading from the /dev/vhost-net device file.
Vulnerability class: Dirty Pipe (CVE-2022-0847)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 2.3 (Low). Vector: CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.004 (29.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 30th percentile — 29.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: -0.000
Affected products
- Kernel Vhost — versions since 4.8
- Linux Kernel
- Canonical Ubuntu Linux — versions 16.04, 18.04
- Debian Linux — versions 8.0
- Red Hat Enterprise Linux Desktop — versions 7.0
- Red Hat Enterprise Linux Server — versions 7.0
- Red Hat Enterprise Linux Workstation — versions 7.0
- Red Hat Virtualization Host — versions 4.0
Weakness classification (CWE)
References
- access.redhat.com/errata/RHSA-2018:3083 (vendor-advisory, Third Party Advisory)
- usn.ubuntu.com/3762-1/ (vendor-advisory, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2018/07/msg00020.html (mailing-list, Mailing List, Third Party Advisory)
- access.redhat.com/errata/RHSA-2018:2948 (vendor-advisory, Third Party Advisory)
- usn.ubuntu.com/3762-2/ (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2018:3096 (vendor-advisory, Third Party Advisory)
- bugzilla.redhat.com/show_bug.cgi (Third Party Advisory, Issue Tracking)
Frequently asked questions
- What is CVE-2018-1118?
- CVE-2018-1118 is a low-severity vulnerability in Kernel Vhost, classified under Improper Initialization. CVSS score: 2.3/10. Published 2018-05-10.
- How severe is CVE-2018-1118?
- Low severity. CVSS v3 base score is 2.3 out of 10.