CVE-2023-2156

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

6.13% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 92.8% of scored records. A rank, not a probability.

NVD base score

7.5 (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: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

2023-05-09 00:00Z3 YR AGO

Last updated

2024-08-02 06:12Z2 YR AGO

Reserved

2023-04-18

Assigning CNA

redhat

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-617Reachable AssertionBase

Data version

5.1

Document digest

a8debf33ed9100eeea4032de4519c0f9e79f7ce7aba85454fa6feb3ebb843d62

• www.zerodayinitiative.comhttps://www.zerodayinitiative.com/advisories/ZDI-23-547/
• bugzilla.redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=2196292
• www.openwall.com[oss-security] 20230517 Re: IPv6 and Route of Deathhttp://www.openwall.com/lists/oss-security/2023/05/17/8mailing-list
• www.openwall.com[oss-security] 20230517 Re: IPv6 and Route of Deathhttp://www.openwall.com/lists/oss-security/2023/05/17/9mailing-list
• www.openwall.com[oss-security] 20230518 Re: IPv6 and Route of Deathhttp://www.openwall.com/lists/oss-security/2023/05/18/1mailing-list
• www.openwall.com[oss-security] 20230519 Re: IPv6 and Route of Deathhttp://www.openwall.com/lists/oss-security/2023/05/19/1mailing-list
• security.netapp.comhttps://security.netapp.com/advisory/ntap-20230622-0001/
• www.debian.orgDSA-5448https://www.debian.org/security/2023/dsa-5448vendor-advisory
• www.debian.orgDSA-5453https://www.debian.org/security/2023/dsa-5453vendor-advisory
• lists.debian.org[debian-lts-announce] 20230802 [SECURITY] [DLA 3512-1] linux-5.10 security updatehttps://lists.debian.org/debian-lts-announce/2023/08/msg00001.htmlmailing-list