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Fedora 44 perl-Net-DNS Critical Remote Code Injection DoS 2026

Linuxsecurity •LinuxSecurity Advisories • September 10, 2026

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Net::DNS is a collection of Perl modules that act as a Domain Name System

(DNS) resolver. It allows the programmer to perform DNS queries that are

beyond the capabilities of gethostbyname and gethostbyaddr.

The programmer should be somewhat familiar with the format of a DNS packet and

its various sections. See RFC 1035 or DNS and BIND (Albitz & Liu) for details.

Update to Net-DNS 1.56 (from 1.53). Security fixes: - CVE-worthy: Remote code injection via EDNS EXTENDED ERROR (rt.cpan #179945) - Denial of Service via long DNS compression chains (rt.cpan #179946) - Resolver/UNIX.pm no longer relies on shell for uname (rt.cpan #176900) Bug fixes: - Fix TCP read loop treating 1-byte recv() of "0" (0x30) as EOF, which corrupted AXFRs (rt.cpan #177003) - Fix unhelpful TAINT error (rt.cpan #178183) - Fix unreachable-code warning under Apache/mod_perl (rt.cpan #179692/#176900) - Documentation fix for Net::DNS::RR::RRSIG::verify() (rt.cpan #180088). Other: - Resync with IANA DNS parameters and DNSSEC algorithm registries - New DNSKEY adt() accessor; DELEG parser backported to SVCB

* Mon Jul 20 2026 Jitka Plesnikova - 1.56-1 - 1.56 bump (rhbz#2501994) * Mon Jun 15 2026 Jitka Plesnikova - 1.55-1 - 1.55 bump (rhbz#2430556) - Update upstream GPG signing key (NLnet Labs releases signing key G2)

[ 1 ] Bug #2509247 - CVE-2026-64193 perl-Net-DNS: Net::DNS: Arbitrary code execution via EDNS EXTENDED ERROR handling [fedora-all] [ 2 ] Bug #2509706 - CVE-2026-64194 perl-Net-DNS: Net::DNS: Denial of Service via crafted DNS compression pointers [fedora-all]

This update can be installed with the "dnf" update program. Use su -c 'dnf upgrade --advisory FEDORA-2026-a0607111e6' at the command line. For more information, refer to the dnf documentation available at

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This article is one source in a clustered incident — the cluster page carries the summary, timeline and every other outlet covering it.

Critical Remote Code Execution Vulnerability in Fedora's perl-Net-DNS Fedora has released an advisory for a critical vulnerability in the perl-Net-DNS module affecting versions 1.53 to 1.56. The vulnerabilities, identified as CVE-2026-64193 and CVE-2026-64194, allow for remote code execution and denial of service through crafted DNS queries. The flaws stem from improper handling of EDNS EXTENDED ERROR and long DNS compression chains. Users are advised to upgrade to version 1.56 to mitigate these risks. The vulnerabilities were published on July 20, 2026, and are confirmed to affect all Fedora systems running the affected versions. The advisory emphasizes the urgency of applying the patch due to the potential for exploitation. The update can be installed using the 'dnf' package manager, and detailed instructions are provided in the advisory. 2 sources 72

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Fedora 44 perl-Net-DNS Critical Remote Code Injection DoS 2026

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Extracted Entities

Attack Types (1)

Companies (1)

CVEs (2)

CWE Weaknesses (2)

Domains (1)

Platforms (2)

Tools (1)