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CVE-2026-81563 is a remotely exploitable resource-management flaw in BIND 9 recursive resolvers. When processing an SVCB or HTTPS AliasMode record that references 14 or more SVCB/HTTPS ServiceMode records, the additional-data processing path can fail to release qpcache-related internal references. Repeated processing of attacker-controlled record sets accumulates unreleased resources. Affected releases include BIND 9.18.0 through 9.18.50, 9.20.0 through 9.20.27, 9.21.0 through 9.21.25, 9.18.11-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.27-S1.
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No public exploit code observed for this vulnerability.
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10 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A high-severity remotely exploitable BIND 9 denial-of-service vulnerability involving SVCB/HTTPS AliasMode records.
A resource-exhaustion denial-of-service vulnerability in BIND DNS resolvers. Repeated processing of a crafted SVCB/HTTPS AliasMode record referencing at least 14 ServiceMode records can cause internal resources not to be properly released, ultimately preventing new recursive DNS lookups.
A high-severity, remotely exploitable denial-of-service vulnerability in BIND 9 recursive resolvers. Crafted SVCB/HTTPS AliasMode records that reference at least 14 ServiceMode records cause improper deallocation of internal qpcache-related resources, enabling repeated requests to consume memory beyond configured limits until named is terminated or host memory is exhausted.
An unpatched, remotely reachable denial-of-service vulnerability affecting Debian Linux 12.0, 13.0, and 14.0. The supplied CVSS v3 vector indicates low-complexity network exploitation requiring no privileges or user interaction, with availability impact only.
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.