Bug 2509246 - CVE-2026-64193 perl-Net-DNS: Net::DNS: Arbitrary code execution via EDNS EXTENDED ERROR handling [epel-all]
Summary: CVE-2026-64193 perl-Net-DNS: Net::DNS: Arbitrary code execution via EDNS EXTE...
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Fedora EPEL
Classification: Fedora
Component: perl-Net-DNS
Version: epel10
Hardware: Unspecified
OS: Unspecified
urgent
urgent
Target Milestone: ---
Assignee: Paul Wouters
QA Contact:
URL:
Whiteboard: {"flaws": ["bc9a89c5-ade0-417b-8267-8...
Depends On:
Blocks: CVE-2026-64193
TreeView+ depends on / blocked
 
Reported: 2026-07-30 10:56 UTC by Tomas Hoger
Modified: 2026-09-10 00:38 UTC (History)
4 users (show)

Fixed In Version: perl-Net-DNS-1.56-1.el10_3 perl-Net-DNS-1.56-1.el10_4
Clone Of:
Environment:
Last Closed: 2026-09-10 00:26:14 UTC
Type: ---
Embargoed:


Attachments (Terms of Use)

Description Tomas Hoger 2026-07-30 10:56:09 UTC
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

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:`"<command>"`} in EXTRA-TEXT.

Comment 1 Fedora Update System 2026-09-01 10:32:06 UTC
FEDORA-EPEL-2026-8249fe4a72 (perl-Net-DNS-1.56-1.el10_4) has been submitted as an update to Fedora EPEL 10.4.
https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-8249fe4a72

Comment 2 Fedora Update System 2026-09-01 10:42:44 UTC
FEDORA-EPEL-2026-9d8de529df (perl-Net-DNS-1.56-1.el10_3) has been submitted as an update to Fedora EPEL 10.3.
https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-9d8de529df

Comment 3 Fedora Update System 2026-09-02 01:41:53 UTC
FEDORA-EPEL-2026-9d8de529df has been pushed to the Fedora EPEL 10.3 testing repository.

You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-9d8de529df

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 4 Fedora Update System 2026-09-02 01:50:06 UTC
FEDORA-EPEL-2026-8249fe4a72 has been pushed to the Fedora EPEL 10.4 testing repository.

You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-8249fe4a72

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 5 Fedora Update System 2026-09-10 00:26:14 UTC
FEDORA-EPEL-2026-9d8de529df (perl-Net-DNS-1.56-1.el10_3) has been pushed to the Fedora EPEL 10.3 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 6 Fedora Update System 2026-09-10 00:38:54 UTC
FEDORA-EPEL-2026-8249fe4a72 (perl-Net-DNS-1.56-1.el10_4) has been pushed to the Fedora EPEL 10.4 stable repository.
If problem still persists, please make note of it in this bug report.


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