CVE-2023-50868

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

81.73% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 99.6% 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

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

Red Hat severity

Important. 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

2024-02-14 00:00Z2 YR AGO

Last updated

2025-11-04 18:20Z10 MO AGO

Reserved

2023-12-14

Assigning CNA

mitre

Record state

PUBLISHED

Severity

High (CVSS 7.5)

CNA CVSS vector

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

Weaknesses

• CWE-400Uncontrolled Resource ConsumptionClass

Data version

5.2

Document digest

9262a9b6ce46ff6ecbbcec36defbab93ecd45f5ea249d6e5bd4fef4b8014d928

• nlnetlabs.nlhttps://nlnetlabs.nl/news/2024/Feb/13/unbound-1.19.1-released/
• docs.powerdns.comhttps://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2024-01.html
• www.isc.orghttps://www.isc.org/blogs/2024-bind-security-release/
• datatracker.ietf.orghttps://datatracker.ietf.org/doc/html/rfc5155
• kb.isc.orghttps://kb.isc.org/docs/cve-2023-50868
• gitlab.nic.czhttps://gitlab.nic.cz/knot/knot-resolver/-/releases/v5.7.1
• lists.thekelleys.org.ukhttps://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2024q1/017430.html
• access.redhat.comhttps://access.redhat.com/security/cve/CVE-2023-50868
• bugzilla.suse.comhttps://bugzilla.suse.com/show_bug.cgi?id=1219826
• www.openwall.com[oss-security] 20240216 Re: Unbound: disclosure of CVE-2023-50387 and CVE-2023-50868 DNSSEC validation vulnerabilitieshttp://www.openwall.com/lists/oss-security/2024/02/16/2mailing-list
• www.openwall.com[oss-security] 20240216 Re: Unbound: disclosure of CVE-2023-50387 and CVE-2023-50868 DNSSEC validation vulnerabilitieshttp://www.openwall.com/lists/oss-security/2024/02/16/3mailing-list
• lists.fedoraproject.orgFEDORA-2024-2e26eccfcbhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SVYA42BLXUCIDLD35YIJPJSHDIADNYMP/vendor-advisory
• lists.fedoraproject.orgFEDORA-2024-e24211eff0https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BUIP7T7Z4T3UHLXFWG6XIVDP4GYPD3AI/vendor-advisory
• lists.fedoraproject.orgFEDORA-2024-21310568fahttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PNNHZSZPG2E7NBMBNYPGHCFI4V4XRWNQ/vendor-advisory
• lists.debian.org[debian-lts-announce] 20240221 [SECURITY] [DLA 3736-1] unbound security updatehttps://lists.debian.org/debian-lts-announce/2024/02/msg00006.htmlmailing-list
• lists.fedoraproject.orgFEDORA-2024-b0f9656a76https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TEXGOYGW7DBS3N2QSSQONZ4ENIRQEAPG/vendor-advisory
• lists.fedoraproject.orgFEDORA-2024-4e36df9dfdhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UQESRWMJCF4JEYJEAKLRM6CT55GLJAB7/vendor-advisory
• lists.fedoraproject.orgFEDORA-2024-499b9be35fhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RGS7JN6FZXUSTC2XKQHH27574XOULYYJ/vendor-advisory
• lists.fedoraproject.orgFEDORA-2024-c36c448396https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HVRDSJVZKMCXKKPP6PNR62T7RWZ3YSDZ/vendor-advisory
• lists.fedoraproject.orgFEDORA-2024-c967c7d287https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6FV5O347JTX7P5OZA6NGO4MKTXRXMKOZ/vendor-advisory
• lists.fedoraproject.orgFEDORA-2024-e00eceb11chttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IGSLGKUAQTW5JPPZCMF5YPEYALLRUZZ6/vendor-advisory
• lists.fedoraproject.orgFEDORA-2024-fae88b73ebhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZDZFMEKQTZ4L7RY46FCENWFB5MDT263R/vendor-advisory
• security.netapp.comhttps://security.netapp.com/advisory/ntap-20240307-0008/
• lists.debian.org[debian-lts-announce] 20240517 [SECURITY] [DLA 3816-1] bind9 security updatehttps://lists.debian.org/debian-lts-announce/2024/05/msg00011.htmlmailing-list
• lists.debian.orghttps://lists.debian.org/debian-lts-announce/2024/11/msg00035.html
• lists.debian.orghttps://lists.debian.org/debian-lts-announce/2024/09/msg00001.html
• lists.fedoraproject.orghttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZDZFMEKQTZ4L7RY46FCENWFB5MDT263R/
• lists.fedoraproject.orghttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/HVRDSJVZKMCXKKPP6PNR62T7RWZ3YSDZ/
• lists.fedoraproject.orghttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/BUIP7T7Z4T3UHLXFWG6XIVDP4GYPD3AI/