Loading vulnerability…
CVE-2026-5950 is an unbounded resend-loop flaw in the BIND 9 recursive resolver's bad-server handling. In affected retry paths, rctx_resend() can invoke query processing without traversing the normal path that increments per-fetch and global query counters. Consequently, configured recursion-query safeguards, including max-recursion-queries and max-query-count, may be bypassed. Repeated upstream error conditions can therefore make the resolver resend queries in a tight loop until the fetch timeout expires. Affected versions are BIND 9.18.36 through 9.18.48, 9.20.8 through 9.20.22, 9.21.7 through 9.21.21, and the corresponding affected Supported Preview Edition releases.
Mallory correlates every CVE against your assets, your vendors, and active adversary campaigns. Know which vulnerabilities matter for you, not just which ones are loud.
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
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.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
14 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Unknown; the content lists this CVE as a reference but does not describe the vulnerability.
A BIND 9 resolver denial-of-service vulnerability in which resend logic in rctx_resend() bypasses query counter safeguards, allowing a malicious upstream DNS server to trigger excessive outbound retries, CPU exhaustion, and outbound query flooding until timeout.
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.
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.