CVE-2026-27854 — Use after free when parsing EDNS options in Lua
An attacker might be able to trigger a use-after-free by sending crafted DNS queries to a DNSdist using the DNSQuestion:getEDNSOptions method in custom Lua code. In some cases D…
Published: 2026-03-31 · CVSS: 4.8 · CVSS 3.1
An attacker might be able to trigger a use-after-free by sending crafted DNS queries to a DNSdist using the DNSQuestion:getEDNSOptions method in custom Lua code. In some cases DNSQuestion:getEDNSOptions might refer to a version of the DNS packet that has been modified, thus triggering a use-after-free and potentially a crash resulting in denial of service.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7