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CVE-2018-18849

19
FAUCET Score

CVE-2018-18849 describes an out-of-bounds access vulnerability in QEMU version 3.0.0, specifically within the lsi_do_msgin function in hw/scsi/lsi53c895a.c, affecting products like Canonical, Fedora, and openSUSE. This medium-severity vulnerability (CVSS 5.5) can lead to high availability impact through local, low-complexity attacks requiring low privileges. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion or media coverage, indicating a low current threat landscape.

Impacted Technologies

VendorProductVersion(s)CPE
3.0.0CPE matchmatch criteria
cpe:2.3:a:qemu:qemu:3.0.0:*:*:*:*:*:*:*
15.0CPE matchmatch criteria
cpe:2.3:o:opensuse:leap:15.0:*:*:*:*:*:*:*
42.3CPE matchmatch criteria
cpe:2.3:o:opensuse:leap:42.3:*:*:*:*:*:*:*
29CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:29:*:*:*:*:*:*:*
14.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.5MEDIUM

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.56%
Probability of exploitation in next 30 days
EPSS Percentile
43.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0056 is in the 94th percentile among its peer group of 15,940 CVEs.

Social Chatter

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

Vendor Patches (1)

redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: xen

Vendor Advisories (1)

redhatCVE-2018-18849Moderate

QEMU: lsi53c895a: OOB msg buffer access leads to DoS

Oct 25, 2018

References

lists.opensuse.org / opensuse-security-announce/2018-12/msg00004.html
Third Party Advisory
lists.opensuse.org / opensuse-security-announce/2018-12/msg00028.html
Third Party Advisory
lists.opensuse.org / opensuse-security-announce/2018-12/msg00043.html
Third Party Advisory
lists.debian.org / debian-lts-announce/2019/05/msg00010.html
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/LQIBTGNRDQEXGAAYHE4JIWFAYFNHZ6QP
lists.gnu.org / archive/html/qemu-devel/2018-10/msg06401.html
PatchThird Party Advisory
seclists.org / bugtraq/2019/May/76
security.netapp.com / advisory/ntap-20190411-0006
Third Party Advisory
usn.ubuntu.com / 3826-1
Third Party Advisory
debian.org / security/2019/dsa-4454
openwall.com / lists/oss-security/2018/11/01/1
Mailing ListPatchThird Party Advisory