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 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.
DEBIAN-CVE-2026-64193
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:DEBIAN-CVE-2026-64193
libnet-dns-perl
Source reference: /affected/0/package/name
- Affected versions
- 1.50-1
Source reference:
/affected/0/versions1.53-1Source reference:
/affected/0/versions1.54-1Source reference:
/affected/0/versions1.55-1Source reference:
/affected/0/versions - Fixed versions
- 1.56-0+deb13u1
Source reference:
/affected/0/ranges - Prerequisites
- Not stated in this record
libnet-dns-perl
Source reference: /affected/1/package/name
- Affected versions
- 1.50-1
Source reference:
/affected/1/versions1.53-1Source reference:
/affected/1/versions1.54-1Source reference:
/affected/1/versions1.55-1Source reference:
/affected/1/versions - Fixed versions
- 1.56-1
Source reference:
/affected/1/ranges - Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.56-0+deb13u1"
}
]
}
],
"package": {
"name": "libnet-dns-perl",
"purl": "pkg:deb/debian/libnet-dns-perl?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"1.50-1",
"1.53-1",
"1.54-1",
"1.55-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-64193.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.56-1"
}
]
}
],
"package": {
"name": "libnet-dns-perl",
"purl": "pkg:deb/debian/libnet-dns-perl?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"1.50-1",
"1.53-1",
"1.54-1",
"1.55-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-64193.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #58131 · Revision 1
- Added to Heist Feed
- Publisher date