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CVE-2018-19665

21
FAUCET Score

CVE-2018-19665 is a memory corruption vulnerability in the Bluetooth subsystem of QEMU, affecting openSUSE Leap and QEMU distributions. It arises from mishandling negative length values, leading to a denial-of-service impact. Rated Medium (CVSS 5.7), it requires adjacent network access and low privileges to exploit, but no user interaction. Currently, there is no known active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 3.0.1CPE matchmatch criteria
cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:*
3.1.0CPE matchmatch criteria
cpe:2.3:a:qemu:qemu:3.1.0:rc0:*:*:*:*:*:*
42.3CPE matchmatch criteria
cpe:2.3:o:opensuse:leap:42.3:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.7MEDIUM

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

Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
2.1
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.88%
Probability of exploitation in next 30 days
EPSS Percentile
55.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0088 is in the 85th percentile among its peer group of 314 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.2 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 (4)

microsoftpatch availablevia msrc
Product: 16955-16820Fixed in: 4.2.0-21
microsoftpatch availablevia msrc
Product: cm1 qemu-kvm 4.2.0-21 on CBL Mariner 1.0Fixed in: 4.2.0-21
microsoftpatch availablevia msrc
Product: CBL Mariner 1.0 ARMFixed in: 4.2.0-21
microsoftpatch availablevia msrc
Product: CBL Mariner 1.0 x64Fixed in: 4.2.0-21

Vendor Advisories (3)

microsoft2020-Aug/CVE-2018-19665

CVE-2018-19665

Aug 11, 2020
microsoft2018-Dec/CVE-2018-19665Moderate

The Bluetooth subsystem in QEMU mishandles negative values for length variables leading to memory corruption.

Dec 11, 2018
redhatCVE-2018-19665Moderate

Qemu: bt: Integer overflow in Bluetooth routines allows memory corruption

Oct 18, 2018

References

lists.opensuse.org / opensuse-security-announce/2019-04/msg00072.html
Mailing ListThird Party Advisory
lists.gnu.org / archive/html/qemu-devel/2018-11/msg03570.html
Mailing ListPatchThird Party Advisory
openwall.com / lists/oss-security/2018/11/29/1
Mailing ListPatchThird Party Advisory
securityfocus.com / bid/106050
Third Party AdvisoryVDB Entry