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Details of issue NIXPKGS-2026-0930

NIXPKGS-2026-0930
published 2 months, 3 weeks ago
Permalink CVE-2026-27854
4.8 MEDIUM
  • CVSS version (CVSS): 3.1
  • Attack Vector (AV): Network (N)
  • Attack Complexity (AC): High (H)
  • Privileges Required (PR): None (N)
  • User Interaction (UI): None (N)
  • Scope (S): Unchanged (U)
  • Confidentiality (C): Low (L)
  • Integrity (I): None (N)
  • Availability (A): Low (L)
  • Modified Attack Vector (MAV): Network (N)
  • Modified Attack Complexity (MAC): High (H)
  • Modified Privileges Required (MPR): None (N)
  • Modified User Interaction (MUI): None (N)
  • Modified Confidentiality (MC): Low (L)
  • Modified Scope (MS): Unchanged (U)
  • Modified Integrity (MI): None (N)
  • Modified Availability (MA): Low (L)
updated 2 months, 3 weeks ago by @LeSuisse Activity log
  • Created suggestion 2 months, 3 weeks ago
  • @LeSuisse accepted 2 months, 3 weeks ago
  • @LeSuisse published on GitHub 2 months, 3 weeks 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