CVE-2019-18224

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

3.70% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 89.2% 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 2026-10-14.

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

2019-10-21 16:21Z7 YR AGO

Last updated

2026-10-14 06:54Z15 DAYS AGO

Reserved

2019-10-21

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-122Heap-based Buffer OverflowVariant
• CWE-787Out-of-bounds WriteBase

Data version

5.2

Document digest

36178232c73b5da21f53670274f1b44277403cb196caaf40d1182e4bf30aa5c2

• github.comhttps://github.com/libidn/libidn2/compare/libidn2-2.1.0...libidn2-2.1.1x_refsource_MISC
• github.comhttps://github.com/libidn/libidn2/commit/e4d1558aa2c1c04a05066ee8600f37603890ba8cx_refsource_MISC
• bugs.chromium.orghttps://bugs.chromium.org/p/oss-fuzz/issues/detail?id=12420x_refsource_MISC
• usn.ubuntu.comUSN-4168-1https://usn.ubuntu.com/4168-1/vendor-advisoryx_refsource_UBUNTU
• lists.fedoraproject.orgFEDORA-2019-a8d35fcf7chttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JDQVQ2XPV5BTZUFINT7AFJSKNNBVURNJ/vendor-advisoryx_refsource_FEDORA
• lists.fedoraproject.orgFEDORA-2019-d3221d69e0https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MINU5RKDFE6TKAFY5DRFN3WSFDS4DYVS/vendor-advisoryx_refsource_FEDORA
• lists.opensuse.orgopenSUSE-SU-2019:2611http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00009.htmlvendor-advisoryx_refsource_SUSE
• lists.opensuse.orgopenSUSE-SU-2019:2613http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00008.htmlvendor-advisoryx_refsource_SUSE
• www.debian.orgDSA-4613https://www.debian.org/security/2020/dsa-4613vendor-advisoryx_refsource_DEBIAN
• seclists.org20200203 [SECURITY] [DSA 4613-1] libidn2 security updatehttps://seclists.org/bugtraq/2020/Feb/4mailing-listx_refsource_BUGTRAQ
• security.gentoo.orgGLSA-202003-63https://security.gentoo.org/glsa/202003-63vendor-advisoryx_refsource_GENTOO
• cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-398330.html