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CVE-2026-5950 is an unbounded resend loop vulnerability in the ISC BIND 9 resolver state machine during bad-server handling. A remote unauthenticated attacker can send DNS queries that trigger specific retry conditions, causing the resolver to repeatedly resend requests without a proper bound or termination condition. The issue affects recursive resolver functionality in BIND 9; authoritative services are believed to be unaffected. Reported affected versions are 9.18.36 through 9.18.48, 9.20.8 through 9.20.22, 9.21.7 through 9.21.21, 9.18.36-S1 through 9.18.48-S1, and 9.20.9-S1 through 9.20.22-S1.
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No valid public exploits. Mallory filtered out 1 candidate as fakes, detection scripts, or README-only repos.
All candidate exploits were filtered out by Mallory's validation.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
11 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
An unbounded resend loop vulnerability in ISC BIND 9 resolver logic that can be exploited to exhaust CPU and memory resources and cause denial-of-service.
An unbounded resend loop vulnerability in the BIND 9 resolver state machine that allows unauthenticated remote attackers to trigger retry loops and exhaust host resources.
A remotely exploitable resource exhaustion vulnerability in the BIND 9 resolver caused by an unbounded resend loop in bad-server handling.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.