This page tracks the Debian fix status. The vulnerability itself is described on the main CVE page. View CVE-2026-64193 →

DEBIAN-CVE-2026-64193

Net::DNS versions through 1.55 for Perl allow remote execution injection via EDNS EXTENDED ERROR. Net::DNS::RR::OPT::EXTENDED_ERROR::_decompose parse...

Original description

The description as published by the source.

Net::DNS versions through 1.55 for Perl allow remote execution injection via EDNS EXTENDED ERROR. Net::DNS::RR::OPT::EXTENDED_ERROR::_decompose parses the EXTRA-TEXT field of an EDNS EXTENDED-ERROR option (RFC 8914) by tokenising the raw bytes and passing the result to Perl's eval. There is some escaping done for $ and @, but not for backticks. This can be exploited for command execution if $pkt->edns->option('EXTENDED-ERROR') is called in array context, for example with a payload of {0:""} in EXTRA-TEXT.

Source: OSV.dev (Open Source Vulnerabilities) OSV

Affected packages

Debian:13 libnet-dns-perl

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.56-0+deb13u1"}]}]

Debian:14 libnet-dns-perl

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.56-1"}]}]

References

advisory security-tracker.debian.org