Vulnerability Details CVE-2026-27853
An attacker might be able to trigger an out-of-bounds write by sending crafted DNS responses to a DNSdist using the DNSQuestion:changeName or DNSResponse:changeName methods in custom Lua code. In some cases the rewritten packet might become larger than the initial response and even exceed 65535 bytes, potentially leading to a crash resulting in denial of service.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 6.4%
CVSS Severity
CVSS v3 Score 5.9
Products affected by CVE-2026-27853
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cpe:2.3:a:powerdns:dnsdist:1.9.0
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cpe:2.3:a:powerdns:dnsdist:1.9.1
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cpe:2.3:a:powerdns:dnsdist:1.9.10
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cpe:2.3:a:powerdns:dnsdist:1.9.11
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cpe:2.3:a:powerdns:dnsdist:1.9.2
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cpe:2.3:a:powerdns:dnsdist:1.9.3
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cpe:2.3:a:powerdns:dnsdist:1.9.4
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cpe:2.3:a:powerdns:dnsdist:1.9.5
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cpe:2.3:a:powerdns:dnsdist:1.9.6
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cpe:2.3:a:powerdns:dnsdist:1.9.7
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cpe:2.3:a:powerdns:dnsdist:1.9.8
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cpe:2.3:a:powerdns:dnsdist:1.9.9
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cpe:2.3:a:powerdns:dnsdist:2.0.0
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cpe:2.3:a:powerdns:dnsdist:2.0.1
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cpe:2.3:a:powerdns:dnsdist:2.0.2