CVE-2018-6764: canonical ubuntu_linux Origin Validation Error
Vulnerability summary
CVE-2018-6764 is a high (CVSS 7.8) Origin Validation Error vulnerability in canonical ubuntu_linux. EPSS estimates a 0.33% chance of exploitation in the next 30 days, higher than 25.7% of scored vulnerabilities.
Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 4 · Related 3Timeline
- 23-02-2018PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
util/virlog.c in libvirt does not properly determine the hostname on LXC container startup, which allows local guest OS users to bypass an intended container protection mechanism and execute arbitrary commands via a crafted NSS module.
CVSS metrics
5 scores · 4 sources · 2 versions- OSV · Red hatEcosystem advisory · calculated5.0MediumCVSS:3.0/AV:L/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:LDiffers
- OSV · UbuntuEcosystem advisory · calculated7.8HighCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated7.8HighCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
0.33%
Chance of exploitation in the next 30 days
Percentile
26%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.33% on 05-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Redhat37 products
- enterprise_linux_desktop7.0
- enterprise_linux_server7.0
- enterprise_linux_workstation7.0
- libvirtna
- virtualization4.0
Debian2 products
- libvirt< 4.0.0-2
- debian_linuxEOL8.0 | 9.0
Canonical1 product
- ubuntu_linuxEOL14.04 | 16.04 | 17.10
Ubuntu1 product
- libvirt< 1.3.1-1ubuntu10.19
4 vendors · 41 products
References
131 links
- access.redhat.com/errata/RHSA-2018:3113Vendor AdvisoryX Refsource REDHATThird Party AdvisoryAdvisory
- www.redhat.com/archives/libvir-list/2018-February/msg00239.htmlMailing ListX Refsource MLISTPatchThird Party Advisory
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