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CVE-2018-18438

20
FAUCET Score

CVE-2018-18438 is an integer overflow vulnerability in QEMU's IOReadHandler and related functions, affecting various QEMU and Red Hat Enterprise Linux/OpenStack products. Rated Medium (CVSS 5.5), this local attack requires low privileges and can lead to high availability impact, but no confidentiality or integrity compromise. There is currently no evidence of active exploitation, public exploit code, or significant community discussion, suggesting a low immediate threat.

Impacted Technologies

VendorProductVersion(s)CPE
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:qemu:qemu:-:*:*:*:*:*:*:*
6.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*
7.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
8CPE matchmatch criteria
cpe:2.3:a:redhat:openstack:8:*:*:*:*:*:*:*
9CPE matchmatch criteria
cpe:2.3:a:redhat:openstack:9:*:*:*:*:*:*:*

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
0.44%
Probability of exploitation in next 30 days
EPSS Percentile
36.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0044 is in the 90th 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 Advisories (1)

redhatCVE-2018-18438

Qemu: Integer overflow in ccid_card_vscard_read() allows memory corruption

Oct 11, 2018

References

lists.gnu.org / archive/html/qemu-devel/2018-10/msg02396.html
Mailing ListPatchThird Party Advisory
lists.gnu.org / archive/html/qemu-devel/2018-10/msg02402.html
Mailing ListPatchThird Party Advisory
openwall.com / lists/oss-security/2018/10/17/3
Mailing ListThird Party Advisory
securityfocus.com / bid/105953
Third Party AdvisoryVDB Entry