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CVE-2026-81563 SVCB AliasMode additional-data error leaks qpcache references

🗓️ 16 Sep 2026 14:00:04Reported by iscType 
cvelist
 cvelist
🔗 www.cve.org👁 44 Views

BIND 9 resolver resource exhaustion DoS via SVCB AliasMode records with 14+ ServiceMode references.

Related
Affected
Refs
[
  {
    "vendor": "ISC",
    "product": "BIND 9",
    "versions": [
      {
        "version": "9.18.0",
        "lessThanOrEqual": "9.18.50",
        "status": "affected",
        "versionType": "custom"
      },
      {
        "version": "9.20.0",
        "lessThanOrEqual": "9.20.27",
        "status": "affected",
        "versionType": "custom"
      },
      {
        "version": "9.21.0",
        "lessThanOrEqual": "9.21.25",
        "status": "affected",
        "versionType": "custom"
      },
      {
        "version": "9.18.11-S1",
        "lessThanOrEqual": "9.18.50-S1",
        "status": "affected",
        "versionType": "custom"
      },
      {
        "version": "9.20.9-S1",
        "lessThanOrEqual": "9.20.27-S1",
        "status": "affected",
        "versionType": "custom"
      }
    ],
    "defaultStatus": "unaffected"
  }
]

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16 Sep 2026 14:00Current
CVSS 3.17.5
EPSS0.00569
SSVC
44