CVE-2026-41292 Affecting unbound package, versions <1.22.0-2+deb13u3


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
0.56% (43rd percentile)

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  • Snyk IDSNYK-ECHOLATEST-UNBOUND-18234970
  • published23 Jul 2026
  • disclosed20 May 2026

Introduced: 20 May 2026

CVE-2026-41292  (opens in a new tab)

How to fix?

Upgrade Echo:latest unbound to version 1.22.0-2+deb13u3 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream unbound package and not the unbound package as distributed by Echo. See How to fix? for Echo:latest relevant fixed versions and status.

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 Base Scores

version 3.1