CVE-2018-1064 — libvirt: Incomplete fix for CVE-2018-5748 triggered by QEMU guest agent

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HIGH

libvirt: Incomplete fix for CVE-2018-5748 triggered by QEMU guest agent

Published Mar 28, 2018

7.5

HIGH

CVSS 3.0

EPSS 2.85%

Description

libvirt version before 4.2.0-rc1 is vulnerable to a resource exhaustion as a result of an incomplete fix for CVE-2018-5748 that affects QEMU monitor but now also triggered via QEMU guest agent.

Affected products

Vendor Libvirt Product Libvirt Default
n/a
- Version
  before 4.2.0-rc1
  Status
  affected
  Constraints
  -

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

Libvirt

n/a

Version	Status	Constraints
before 4.2.0-rc1	affected	-

Red Hat Enterprise Linux 6

libvirt-0:0.10.2-64.el6

Fixed · RHSA-2018:1929
Red Hat Enterprise Linux 7

libvirt-0:3.9.0-14.el7_5.4

Fixed · RHSA-2018:1396
Red Hat Storage 3 for RHEL 6

libvirt-0:0.10.2-64.el6

Fixed · RHSA-2018:1929
Red Hat Enterprise Linux 5

libvirt

Not affected
Red Hat Enterprise Linux 8

libvirt

Not affected

Product	Package	State	Advisory
Red Hat Enterprise Linux 6	libvirt-0:0.10.2-64.el6	Fixed	RHSA-2018:1929
Red Hat Enterprise Linux 7	libvirt-0:3.9.0-14.el7_5.4	Fixed	RHSA-2018:1396
Red Hat Storage 3 for RHEL 6	libvirt-0:0.10.2-64.el6	Fixed	RHSA-2018:1929
Red Hat Enterprise Linux 5	libvirt	Not affected	n/a
Red Hat Enterprise Linux 8	libvirt	Not affected	n/a

Remediation

No remediation recorded yet.

Metrics

2.85% 0.02855

Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.

EPSS probability 0.02855

Score over time

2021–2026

EPSS v1
EPSS v2
EPSS v3
EPSS v5

Percentile over time

EPSS v1
EPSS v2
EPSS v3
EPSS v5

Table of values (17 key points)

Flat stretches are collapsed; showing up to 120 newest points.

Date	Score	Percentile	Model
Oct 1, 2026	2.85% (0.02855)	86.24th	v5 (v2026.06.15)
Jun 15, 2026	2.96% (0.02955)	85.35th	v5 (v2026.06.15)
Jul 20, 2024	1.13% (0.01126)	84.79th	v3 (v2023.03.01)
Nov 8, 2023	1.13% (0.01126)	82.96th	v3 (v2023.03.01)
Oct 22, 2023	1.41% (0.01413)	85.01th	v3 (v2023.03.01)
Aug 19, 2023	1.54% (0.01545)	85.49th	v3 (v2023.03.01)
Jul 8, 2023	2.17% (0.02175)	87.81th	v3 (v2023.03.01)
Mar 22, 2023	3.28% (0.03279)	89.75th	v3 (v2023.03.01)
Mar 7, 2023	3.34% (0.03340)	89.84th	v3 (v2023.03.01)
Mar 6, 2023	1.11% (0.01108)	55.18th	v2 (v2022.01.01)
Sep 17, 2022	1.11% (0.01108)	53.57th	v2 (v2022.01.01)
Apr 1, 2022	1.11% (0.01108)	51.54th	v2 (v2022.01.01)
Feb 4, 2022	1.11% (0.01108)	29.61th	v2 (v2022.01.01)
Feb 3, 2022	1.66% (0.01659)	34.20th	v1
Jan 6, 2022	1.66% (0.01659)	33.50th	v1
Sep 1, 2021	1.66% (0.01659)	73.96th	v1
Apr 14, 2021	1.66% (0.01659)	0.00th	v1

Weaknesses (1)

CWE-400

Uncontrolled Resource Consumption

References (11)

https://access.redhat.com/errata/RHSA-2018:1396
vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2018:1929
vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2018-1064
Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1550672
x_refsource_CONFIRMIssue TrackingPatchThird Party Advisory
https://libvirt.org/git/?p=libvirt.git%3Ba=commit%3Bh=fbf31e1a4cd19d6f6e33e0937a009775cd7d9513
x_refsource_CONFIRM
https://lists.debian.org/debian-lts-announce/2018/03/msg00018.html
mailing-listx_refsource_MLISTMailing ListThird Party Advisory
https://nvd.nist.gov/vuln/detail/CVE-2018-1064
https://security.libvirt.org/2018/0004.html
https://usn.ubuntu.com/3680-1/
vendor-advisoryx_refsource_UBUNTU
https://www.cve.org/CVERecord?id=CVE-2018-1064
https://www.debian.org/security/2018/dsa-4137
vendor-advisoryx_refsource_DEBIANThird Party Advisory

Link	Providers	Tags
https://access.redhat.com/errata/RHSA-2018:1396		vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2018:1929		vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2018-1064		Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1550672		x_refsource_CONFIRMIssue TrackingPatchThird Party Advisory
https://libvirt.org/git/?p=libvirt.git%3Ba=commit%3Bh=fbf31e1a4cd19d6f6e33e0937a009775cd7d9513		x_refsource_CONFIRM
https://lists.debian.org/debian-lts-announce/2018/03/msg00018.html		mailing-listx_refsource_MLISTMailing ListThird Party Advisory
https://nvd.nist.gov/vuln/detail/CVE-2018-1064
https://security.libvirt.org/2018/0004.html
https://usn.ubuntu.com/3680-1/		vendor-advisoryx_refsource_UBUNTU
https://www.cve.org/CVERecord?id=CVE-2018-1064
https://www.debian.org/security/2018/dsa-4137		vendor-advisoryx_refsource_DEBIANThird Party Advisory