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CVE-2018-17958

27
FAUCET Score

CVE-2018-17958 is a high-severity buffer overflow vulnerability in Qemu's rtl8139_do_receive function, affecting Canonical, Debian, Qemu, and Red Hat products due to an incorrect integer data type. This network-exploitable flaw requires no user interaction and could lead to a complete denial of service. Despite its high CVSS score of 7.5, there is no evidence of active exploitation, publicly available exploit code, or significant community discussion or media coverage. The EPSS score is very low, indicating a minimal probability of exploitation in the wild.

Impacted Technologies

VendorProductVersion(s)CPE
<= 3.0.1CPE matchmatch criteria
cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:*
14.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*
16.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
18.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
18.10CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
6.17%
Probability of exploitation in next 30 days
EPSS Percentile
92.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0617 is in the 88th percentile among its peer group of 51,466 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (10)

redhatpatch availablevia redhat_api
Product: Red Hat OpenStack Platform 14.0 (Rocky)Fixed in: qemu-kvm-rhev-10:2.12.0-33.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Virtualization 4 for Red Hat Enterprise Linux 7Fixed in: qemu-kvm-rhev-10:2.12.0-33.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenStack Platform 10.0 (Newton)Fixed in: qemu-kvm-rhev-10:2.12.0-33.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Virtualization Engine 4.3Fixed in: qemu-kvm-rhev-10:2.12.0-33.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenStack Platform 13.0 (Queens)Fixed in: qemu-kvm-rhev-10:2.12.0-33.el7
View patch
redhatno patchvia redhat_api
Product: Red Hat OpenStack Platform 12 (Pike)Fixed in: qemu-kvm-rhev
redhatend of lifevia redhat_api
Product: Red Hat OpenStack Platform 9 (Mitaka)Fixed in: qemu-kvm-rhev
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: qemu-kvm
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: qemu-kvm
redhatend of lifevia redhat_api
Product: Red Hat OpenStack Platform 8 (Liberty)Fixed in: qemu-kvm-rhev

Vendor Advisories (1)

redhatCVE-2018-17958Moderate

QEMU: rtl8139: integer overflow leads to buffer overflow

Sep 26, 2018

References

access.redhat.com / errata/RHSA-2019:2425
Third Party Advisory
access.redhat.com / errata/RHSA-2019:2553
Third Party Advisory
lists.debian.org / debian-lts-announce/2019/01/msg00023.html
Mailing ListThird Party Advisory
lists.gnu.org / archive/html/qemu-devel/2018-09/msg03269.html
Mailing ListPatchThird Party Advisory
seclists.org / bugtraq/2019/May/76
Mailing ListThird Party Advisory
usn.ubuntu.com / 3826-1
Third Party Advisory
debian.org / security/2019/dsa-4454
Third Party Advisory
openwall.com / lists/oss-security/2018/10/08/1
Mailing ListThird Party Advisory
securityfocus.com / bid/105556
Third Party AdvisoryVDB Entry