Upstream information
Description
Net::CIDR::Lite versions before 0.23 for Perl mishandles IPv4 mapped IPv6 addresses, which may allow IP ACL bypass._pack_ipv6() includes the sentinel byte from _pack_ipv4() when building the packed representation of IPv4 mapped addresses like ::ffff:192.168.1.1. This produces an 18 byte value instead of 17 bytes, misaligning the IPv4 part of the address.
The wrong length causes incorrect results in mask operations (bitwise AND truncates to the shorter operand) and in find() / bin_find() which use Perl string comparison (lt/gt). This can cause find() to incorrectly match or miss addresses.
Example:
my $cidr = Net::CIDR::Lite->new("::ffff:192.168.1.0/120");
$cidr->find("::ffff:192.168.2.0"); # incorrectly returns true
This is triggered by valid RFC 4291 IPv4 mapped addresses (::ffff:x.x.x.x).
See also CVE-2026-40198, a related issue in the same function affecting malformed IPv6 addresses.
SUSE information
Overall state of this security issue: Pending
This issue is currently rated as having moderate severity.
| CVSS detail | CNA (CISA-ADP) | SUSE |
|---|---|---|
| Base Score | 6.5 | 6.5 |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N |
| Attack Vector | Network | Network |
| Attack Complexity | Low | Low |
| Privileges Required | None | None |
| User Interaction | None | None |
| Scope | Unchanged | Unchanged |
| Confidentiality Impact | Low | Low |
| Integrity Impact | Low | Low |
| Availability Impact | None | None |
| CVSSv3 Version | 3.1 | 3.1 |
Status of this issue by product and package
Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification. The updates are grouped by state of their lifecycle. SUSE product lifecycles are documented on the lifecycle page.
| Product(s) | Source package | State |
|---|---|---|
| Products under general support and receiving all security fixes. | ||
| SUSE Linux Enterprise Desktop 15 SP7 | perl-Net-CIDR-Lite | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP7 | perl-Net-CIDR-Lite | Affected |
| SUSE Linux Enterprise Module for Development Tools 15 SP7 | perl-Net-CIDR-Lite | Affected |
| SUSE Linux Enterprise Server 15 SP7 | perl-Net-CIDR-Lite | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP7 | perl-Net-CIDR-Lite | Affected |
| openSUSE Leap 15.6 | perl-Net-CIDR-Lite | Affected |
| Products under Long Term Service Pack support and receiving important and critical security fixes. | ||
| SUSE Linux Enterprise High Performance Computing 15 SP4 | perl-Net-CIDR-Lite | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS | perl-Net-CIDR-Lite | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5 | perl-Net-CIDR-Lite | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS | perl-Net-CIDR-Lite | Affected |
| SUSE Linux Enterprise Module for Development Tools 15 SP4 | perl-Net-CIDR-Lite | Affected |
| SUSE Linux Enterprise Module for Development Tools 15 SP5 | perl-Net-CIDR-Lite | Affected |
| SUSE Linux Enterprise Module for Development Tools 15 SP6 | perl-Net-CIDR-Lite | Affected |
| SUSE Linux Enterprise Server 15 SP4 | perl-Net-CIDR-Lite | Affected |
| SUSE Linux Enterprise Server 15 SP4-LTSS | perl-Net-CIDR-Lite | Affected |
| SUSE Linux Enterprise Server 15 SP5 | perl-Net-CIDR-Lite | Affected |
| SUSE Linux Enterprise Server 15 SP5-LTSS | perl-Net-CIDR-Lite | Affected |
| SUSE Linux Enterprise Server 15 SP6 | perl-Net-CIDR-Lite | Affected |
| SUSE Linux Enterprise Server 15 SP6-LTSS | perl-Net-CIDR-Lite | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | perl-Net-CIDR-Lite | Affected |
| SUSE Manager Proxy 4.3 | perl-Net-CIDR-Lite | Affected |
| SUSE Manager Retail Branch Server 4.3 | perl-Net-CIDR-Lite | Affected |
| SUSE Manager Server 4.3 | perl-Net-CIDR-Lite | Affected |
| Products past their end of life and not receiving proactive updates anymore. | ||
| SUSE CaaS Platform 4.0 | perl-Net-CIDR-Lite | Affected |
| SUSE Enterprise Storage 6 | perl-Net-CIDR-Lite | Affected |
| SUSE Enterprise Storage 7 | perl-Net-CIDR-Lite | Affected |
| SUSE Enterprise Storage 7.1 | perl-Net-CIDR-Lite | Affected |
| SUSE Linux Enterprise Desktop 15 SP1 | perl-Net-CIDR-Lite | Affected |
| SUSE Linux Enterprise Desktop 15 SP2 | perl-Net-CIDR-Lite | Affected |
| SUSE Linux Enterprise Desktop 15 SP3 | perl-Net-CIDR-Lite | Affected |
| SUSE Linux Enterprise Desktop 15 SP4 | perl-Net-CIDR-Lite | Affected |
| SUSE Linux Enterprise Desktop 15 SP5 | perl-Net-CIDR-Lite | Affected |
| SUSE Linux Enterprise Desktop 15 SP6 | perl-Net-CIDR-Lite | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP1 | perl-Net-CIDR-Lite | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP1-ESPOS | perl-Net-CIDR-Lite | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP1-LTSS | perl-Net-CIDR-Lite | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP2 | perl-Net-CIDR-Lite | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP2-ESPOS | perl-Net-CIDR-Lite | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP2-LTSS | perl-Net-CIDR-Lite | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3 | perl-Net-CIDR-Lite | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3-ESPOS | perl-Net-CIDR-Lite | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS | perl-Net-CIDR-Lite | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS | perl-Net-CIDR-Lite | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS | perl-Net-CIDR-Lite | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP6 | perl-Net-CIDR-Lite | Affected |
| SUSE Linux Enterprise Module for Development Tools 15 SP1 | perl-Net-CIDR-Lite | Affected |
| SUSE Linux Enterprise Module for Development Tools 15 SP2 | perl-Net-CIDR-Lite | Affected |
| SUSE Linux Enterprise Module for Development Tools 15 SP3 | perl-Net-CIDR-Lite | Affected |
| SUSE Linux Enterprise Real Time 15 SP2 | perl-Net-CIDR-Lite | Affected |
| SUSE Linux Enterprise Real Time 15 SP3 | perl-Net-CIDR-Lite | Affected |
| SUSE Linux Enterprise Real Time 15 SP4 | perl-Net-CIDR-Lite | Affected |
| SUSE Linux Enterprise Server 15 SP1 | perl-Net-CIDR-Lite | Affected |
| SUSE Linux Enterprise Server 15 SP1-BCL | perl-Net-CIDR-Lite | Affected |
| SUSE Linux Enterprise Server 15 SP1-LTSS | perl-Net-CIDR-Lite | Affected |
| SUSE Linux Enterprise Server 15 SP2 | perl-Net-CIDR-Lite | Affected |
| SUSE Linux Enterprise Server 15 SP2-BCL | perl-Net-CIDR-Lite | Affected |
| SUSE Linux Enterprise Server 15 SP2-LTSS | perl-Net-CIDR-Lite | Affected |
| SUSE Linux Enterprise Server 15 SP3 | perl-Net-CIDR-Lite | Affected |
| SUSE Linux Enterprise Server 15 SP3-BCL | perl-Net-CIDR-Lite | Affected |
| SUSE Linux Enterprise Server 15 SP3-LTSS | perl-Net-CIDR-Lite | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP1 | perl-Net-CIDR-Lite | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP2 | perl-Net-CIDR-Lite | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP3 | perl-Net-CIDR-Lite | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP4 | perl-Net-CIDR-Lite | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 | perl-Net-CIDR-Lite | Affected |
| SUSE Manager Proxy 4.0 | perl-Net-CIDR-Lite | Affected |
| SUSE Manager Proxy 4.1 | perl-Net-CIDR-Lite | Affected |
| SUSE Manager Proxy 4.2 | perl-Net-CIDR-Lite | Affected |
| SUSE Manager Retail Branch Server 4.0 | perl-Net-CIDR-Lite | Affected |
| SUSE Manager Retail Branch Server 4.1 | perl-Net-CIDR-Lite | Affected |
| SUSE Manager Retail Branch Server 4.2 | perl-Net-CIDR-Lite | Affected |
| SUSE Manager Server 4.0 | perl-Net-CIDR-Lite | Affected |
| SUSE Manager Server 4.1 | perl-Net-CIDR-Lite | Affected |
| SUSE Manager Server 4.2 | perl-Net-CIDR-Lite | Affected |
| openSUSE Leap 15.3 | perl-Net-CIDR-Lite | Affected |
| openSUSE Leap 15.4 | perl-Net-CIDR-Lite | Affected |
| openSUSE Leap 15.5 | perl-Net-CIDR-Lite | Affected |
SUSE Timeline for this CVE
CVE page created: Sat Apr 11 02:00:50 2026CVE page last modified: Tue Apr 14 17:52:27 2026