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CVE-2026-40691

🗓️ 22 Jul 2026 14:17:00Reported by ubuntu.comType 
ubuntucve
 ubuntucve
🔗 ubuntu.com👁 5 Views

Heap overflow in Unbound 1.9.0-1.25.1 DNSCrypt TCP reply encryption causing 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
Ubuntu14.04allunbound0unbound_0_all.deb
Ubuntu16.04allunbound0unbound_0_all.deb
Ubuntu18.04allunbound0unbound_0_all.deb
Ubuntu20.04allunbound0unbound_0_all.deb
Ubuntu22.04allunbound0unbound_0_all.deb
Ubuntu24.04allunbound0unbound_0_all.deb
Ubuntu26.04allunbound0unbound_0_all.deb

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06 Aug 2026 23:45Current
5.7Medium risk
Vulners AI Score5.7
CVSS 3.17.5
EPSS0.00293
SSVC
5