CVE-2018-18438

Exploitation

Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.

SSVC decision

Not assessed by CISA

EPSS probability

0.44% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 37.0% of scored records. A rank, not a probability.

NVD base score

5.5 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2018-10-19 22:00Z7 YR AGO

Last updated

2024-08-05 11:08Z2 YR AGO

Reserved

2018-10-17

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-190Integer Overflow or WraparoundBase

Data version

5.1

Document digest

97291a5f8903c064650445484d7bbf03ab94c56cbdd37f8dc08c0241ca939f0d

• www.securityfocus.com105953http://www.securityfocus.com/bid/105953vdb-entryx_refsource_BID
• lists.gnu.org[qemu-devel] 20181012 [PATCH v2 07/11] chardev: Let IOReadHandler use unsigned typehttps://lists.gnu.org/archive/html/qemu-devel/2018-10/msg02402.htmlmailing-listx_refsource_MLIST
• lists.gnu.org[qemu-devel] 20181012 [PATCH v2 00/11] chardev: Convert IO handlers to use unsigned typehttps://lists.gnu.org/archive/html/qemu-devel/2018-10/msg02396.htmlmailing-listx_refsource_MLIST
• www.openwall.com[oss-security] 20181017 CVE-2018-18438 Qemu: Integer overflow in ccid_card_vscard_read() allows memory corruptionhttp://www.openwall.com/lists/oss-security/2018/10/17/3mailing-listx_refsource_MLIST