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CVE-2018-6764

23
FAUCET Score

CVE-2018-6764 describes a local privilege escalation vulnerability in libvirt's util/virlog.c, affecting Canonical, Debian, and Red Hat distributions. This flaw allows a local guest OS user to bypass container protections and execute arbitrary commands by manipulating NSS modules during LXC container startup. With a CVSS v3 score of 7.8 (High), exploitation requires local access and low privileges, but can lead to high impact on confidentiality, integrity, and availability. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:redhat:libvirt:-:*:*:*:*:*:*:*
8.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
4.0CPE matchmatch criteria
cpe:2.3:a:redhat:virtualization:4.0:*:*:*:*:*:*:*
7.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.8HIGH

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.33%
Probability of exploitation in next 30 days
EPSS Percentile
25.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0033 is in the 64th percentile among its peer group of 17,070 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: libvirt-0:4.5.0-10.el7
View patch

Vendor Advisories (1)

redhatCVE-2018-6764Moderate

libvirt: guest could inject executable code via libnss_dns.so loaded by libvirt_lxc before init

Feb 5, 2018

References

access.redhat.com / errata/RHSA-2018:3113
Third Party Advisory
debian.org / security/2018/dsa-4137
Third Party Advisory
redhat.com / archives/libvir-list/2018-February/msg00239.html
PatchThird Party Advisory
ubuntu.com / usn/USN-3576-1
Third Party Advisory