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Details of issue NIXPKGS-2026-0930

NIXPKGS-2026-0930
published on
Permalink CVE-2026-27854
4.8 MEDIUM
  • CVSS version: 3.1
  • Attack vector (AV): NETWORK
  • Attack complexity (AC): HIGH
  • Privileges required (PR): NONE
  • User interaction (UI): NONE
  • Scope (S): UNCHANGED
  • Confidentiality impact (C): LOW
  • Integrity impact (I): NONE
  • Availability impact (A): LOW
updated 1 month ago by @LeSuisse Activity log
  • Created suggestion 1 month ago
  • @LeSuisse accepted 1 month ago
  • @LeSuisse published on GitHub 1 month ago
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 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

dnsdist
  • <2.0.3
  • <1.9.12

Matching in nixpkgs

Package maintainers

https://www.dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2026-02.html