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CVE-2026-12617 is a remotely exploitable denial-of-service vulnerability in the BIND 9 resolver. Specific ordering and content of authoritative DNS responses for CNAME or DNAME records together with A records can trigger an assertion failure and cause the named process to terminate unexpectedly. One trigger sequence involves a query for a DNAME and an A record below that DNAME, followed by a positive A response, a delayed DNAME response, and a negative DNAME response. A second sequence involves queries for a CNAME and A record at the same name, followed by a positive A response and a delayed self-referential CNAME response. Affected releases are BIND 9.18.0 through 9.18.50, BIND 9.20.0 through 9.20.24, BIND Supported Preview Edition 9.18.11-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.24-S1.
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No public exploit code observed for this vulnerability.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
18 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A vulnerability addressed by Fedora advisory 2026-0adbf9c133; the content provides no technical flaw description.
A network-accessible, low-complexity vulnerability affecting F5 BIG-IP DNS and BIG-IP Global Traffic Manager. It requires no privileges or user interaction and can cause high availability impact.
A vulnerability addressed by the Fedora 2026-d87e7f498a update. No technical flaw details are provided.
A vulnerability addressed by the Fedora 43 BIND security advisory; no technical flaw details are provided.
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.