CVE-2026-41292Long list of incoming EDNS options degrades performance
Updated under an hour ago ()
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It affects NLnet Labs Unbound and 7 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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).
- CVSS
- 6.6 MEDIUM (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Red
- Weakness (CWE)
- CWE-407, CWE-770, CWE-1050
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- NLnet Labs
- NVD analysis
- Modified
- Record last updated
- Sep 1, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
NLnet Labs Unbound nlnet_labs:unbound (from the name) | before 1.25.1 | CNA record |
Red Hat Red Hat Enterprise Linux 10 redhat:enterprise_linux | from 0:1.24.2-7.el10_2.2 not affected | CISA ADP |
Red Hat Red Hat OpenShift Container Platform 4.22 redhat:openshift | from 4.22.9.8.202608130832-0 not affected | CISA ADP |
Red Hat Red Hat Hardened Images redhat:hummingbird | from 1.25.1-2.hum1 not affected | CISA ADP |
Red Hat Red Hat Data Grid 8 redhat:jboss_data_grid | 8 | CISA ADP |
Red Hat Red Hat JBoss Enterprise Application Platform Expansion Pack redhat:jbosseapxp | Versions not stated | CISA ADP |
Red Hat Red Hat OpenStack Platform 16.2 redhat:openstack | 16.2 | CISA ADP |
nlnetlabs unbound nlnetlabs:unbound | before 1.25.1 | NVD |
References
- https://www.nlnetlabs.nl/downloads/unbound/CVE-2026-41292.txtvendor-advisory, mitigation
- https://access.redhat.com/errata/RHSA-2026:24013
- https://access.redhat.com/errata/RHSA-2026:36320
- https://access.redhat.com/errata/RHSA-2026:36777
- https://access.redhat.com/errata/RHSA-2026:37282
- https://access.redhat.com/errata/RHSA-2026:54769
- https://access.redhat.com/security/cve/CVE-2026-41292
- https://bugzilla.redhat.com/show_bug.cgi?id=2480125
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-41292.json
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.