CVE-2019-18801

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

2.50% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 83.3% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

NVD analysis status

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

Red Hat severity

Critical. 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

2019-12-13 12:20Z6 YR AGO

Last updated

2024-08-05 02:02Z2 YR AGO

Reserved

2019-11-07

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-787Out-of-bounds WriteBase
• CWE-131Incorrect Calculation of Buffer SizeBase

Data version

5.1

Document digest

11b2b8310226a8c167424a66eaf564398384be0fce2f247d172f1f597a4cf890

• github.comhttps://github.com/envoyproxy/envoy/commits/masterx_refsource_MISC
• groups.google.comhttps://groups.google.com/forum/#%21forum/envoy-usersx_refsource_MISC
• blog.envoyproxy.iohttps://blog.envoyproxy.iox_refsource_MISC
• github.comhttps://github.com/envoyproxy/envoy/security/advisories/GHSA-gxvv-x4p2-rpppx_refsource_CONFIRM
• access.redhat.comhttps://access.redhat.com/errata/RHSA-2019:4222x_refsource_MISC