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CVE PROGRAM SOURCE RECORD4.8 Medium

CVE-2026-27854

Use after free when parsing EDNS options in Lua

Read JSON ↗CVE.org ↗
Status
Published
Published
Updated
Assigning organization
OX

Description

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

PowerDNS DNSdist

Default version status: unaffected

  • 1.9.0 to < 1.9.12affected
  • 2.0.0 to < 2.0.3affected

References