CVE-2018-20124

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

0.49% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 39.7% 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:3.1/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

Moderate. Red Hat's rating for its own products, not a CVSS rating.

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

2018-12-20 22:00Z7 YR AGO

Last updated

2024-08-05 11:51Z2 YR AGO

Reserved

2018-12-13

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-125Out-of-bounds ReadBase
• CWE-787Out-of-bounds WriteBase

Data version

5.1

Document digest

e9a9626db10558c94d9b82ad27e79ba1ba099237549216d094e47f81bcc5fc3f

• lists.gnu.org[qemu-devel] 20181213 [PATCH v2 1/6] rdma: check num_sge does not exceed MAX_SGEhttps://lists.gnu.org/archive/html/qemu-devel/2018-12/msg02822.htmlmailing-listx_refsource_MLIST
• www.openwall.com[oss-security] 20181218 CVE-2018-20124 QEMU: rdma: OOB access when building scatter-gather arrayhttp://www.openwall.com/lists/oss-security/2018/12/18/2mailing-listx_refsource_MLIST
• www.securityfocus.com106290http://www.securityfocus.com/bid/106290vdb-entryx_refsource_BID
• usn.ubuntu.comUSN-3923-1https://usn.ubuntu.com/3923-1/vendor-advisoryx_refsource_UBUNTU