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unbound: Unbound: Denial of Service via crafted DNSCrypt query

🗓️ 22 Jul 2026 14:15:25Reported by RedHatType 
redhat
 redhat
🔗 access.redhat.com👁 12 Views

Unbound DNS resolver with DNSCrypt support: crafted DNSCrypt query over TCP causes memory error and DoS.

Related
Packages
Refs
ReporterTitlePublishedViews
Family
attackerkb
ATTACKERKB
CVE-2026-40691
22 Jul 202613:04
attackerkb
cbl_mariner
CBLMariner
CVE-2026-40691 affecting package unbound for versions less than 1.25.2-1
23 Jul 202620:32
cbl_mariner
cve
CVE
CVE-2026-40691
22 Jul 202613:04
cve
cvelist
Cvelist
CVE-2026-40691 Packet of death for DNSCrypt over TCP
22 Jul 202613:04
cvelist
debiancve
Debian CVE
CVE-2026-40691
22 Jul 202613:04
debiancve
euvd
EUVD
EUVD-2026-47664
22 Jul 202613:04
euvd
freebsd
FreeBSD
unbound -- multiple vulnerabilities
22 Jul 202600:00
freebsd
fedora
Fedora
[SECURITY] Fedora 43 Update: unbound-1.25.2-1.fc43
31 Jul 202601:15
fedora
fedora
Fedora
[SECURITY] Fedora 44 Update: unbound-1.25.2-1.fc44
30 Jul 202601:18
fedora
nessus
Tenable Nessus
Fedora 43 : unbound (2026-3170ee6a1c)
31 Jul 202600:00
nessus
Rows per page
OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Hardened Imagesanyaarch64python3-unbound1.25.2-0.1.hum1python3-unbound-1.25.2-0.1.hum1.aarch64.rpm
Red Hat Hardened Imagesanyx86_64python3-unbound1.25.2-0.1.hum1python3-unbound-1.25.2-0.1.hum1.x86_64.rpm
Red Hat Hardened Imagesanynoarchunbound-munin1.25.2-0.1.hum1unbound-munin-1.25.2-0.1.hum1.noarch.rpm

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21 Aug 2026 20:01Current
5.5Medium risk
Vulners AI Score5.5
CVSS 3.17.5
EPSS0.00293
SSVC
12