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CVE-2026-40691

🗓️ 22 Jul 2026 13:04:35Reported by NLnet LabsType 
cve
 cve
🔗 web.nvd.nist.gov👁 4 Views

Unbound suffers denial of service from oversized encrypted replies over TCP when bounds are missing.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
ATTACKERKB
CVE-2026-40691
22 Jul 202613:04
attackerkb
Cvelist
CVE-2026-40691 Packet of death for DNSCrypt over TCP
22 Jul 202613:04
cvelist
Debian CVE
CVE-2026-40691
22 Jul 202613:04
debiancve
EUVD
EUVD-2026-47664
22 Jul 202613:04
euvd
NVD
CVE-2026-40691
22 Jul 202614:17
nvd
OSV
DEBIAN-CVE-2026-40691
22 Jul 202617:48
osv
Positive Technologies
PT-2026-63371
22 Jul 202600:00
ptsecurity
RedhatCVE
CVE-2026-40691
22 Jul 202616:08
redhatcve
RedHat Linux
Important: Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update
22 Jul 202614:15
redhat
RedHat Linux
unbound: Unbound: Denial of Service via crafted DNSCrypt query
22 Jul 202614:15
redhat
Rows per page
[
  {
    "vendor": "NLnet Labs",
    "product": "Unbound",
    "versions": [
      {
        "version": "1.9.0",
        "status": "affected",
        "lessThan": "1.25.2",
        "versionType": "semver"
      }
    ],
    "defaultStatus": "unaffected"
  }
]

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22 Jul 2026 20:33Current
5.7Medium risk
Vulners AI Score5.7
CVSS 3.17.5
SSVC
4