Not a U.S. government website. NDD is an independent vulnerability database by Volerion and is not affiliated with or endorsed by NIST or NVD.

CVE-2026-41292 Details

Description

NLnet Labs Unbound up to and including version 1.25.0 is vulnerable to a degradation of service attack related to parsing long lists of incoming EDNS options. An adversary sending queries with too many EDNS options can hold Unbound threads hostage while they are parsing and creating internal data structures for the options. Coordinated attacks can result in degradation and/or denial of service. Unbound 1.25.1 contains a patch with a fix to limit acceptable incoming EDNS options (100).

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:7.5 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CNA: redhat-SADPCVSS-B:7.5 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.

URL	Source(s)	Tag(s)
https://access.redhat.com/errata/RHSA-2026:24013	redhat-SADP
https://access.redhat.com/errata/RHSA-2026:36320	redhat-SADP
https://access.redhat.com/errata/RHSA-2026:36777	redhat-SADP
https://access.redhat.com/errata/RHSA-2026:37282	redhat-SADP
https://access.redhat.com/errata/RHSA-2026:54769	redhat-SADP
https://access.redhat.com/security/cve/CVE-2026-41292	redhat-SADP
https://bugzilla.redhat.com/show_bug.cgi?id=2480125	redhat-SADP
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-41292.json	redhat-SADP
https://www.nlnetlabs.nl/downloads/unbound/CVE-2026-41292.txt	[email protected]	MitigationVendor Advisory

see all 9 references

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-1050	Excessive Platform Resource Consumption within a Loop	redhat-SADP
CWE-407	Inefficient Algorithmic Complexity	[email protected]
CWE-770	Allocation of Resources Without Limits or Throttling	[email protected]

Affected Products

Product	Versions
nlnetlabs unbound	< 1.25.1
CPE cpe:2.3:a:nlnetlabs:unbound:::::::: Remediation No remediation found in references.

Change History

13 change records found show changes

Date	Action	Recorded By
Aug 26, 2026	CVE Modified	redhat-SADP
Aug 26, 2026	CVE Modified	[email protected]
Aug 24, 2026	CVE Modified	redhat-SADP
Aug 19, 2026	CVE Modified	redhat-SADP
Jul 29, 2026	CVE Modified	redhat-SADP
Jul 24, 2026	CVE Translated	[email protected]
Jul 16, 2026	CVE Modified	redhat-SADP
Jul 15, 2026	CVE Modified	redhat-SADP
Jun 30, 2026	CVE Modified	redhat-SADP
Jun 17, 2026	CVE Modified	CISA-ADP
Jun 17, 2026	CVE Modified	[email protected]
May 20, 2026	Initial Analysis	[email protected]
May 20, 2026	New CVE Received	[email protected]