CVE-2026-49941 Affecting libnet-cidr-set-perl package, versions <0.15-1+deb13u1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-DEBIAN13-LIBNETCIDRSETPERL-17139957
- published4 Jun 2026
- disclosed4 Jun 2026
Introduced: 4 Jun 2026
CVE-2026-49941 (opens in a new tab)How to fix?
Upgrade Debian:13 libnet-cidr-set-perl to version 0.15-1+deb13u1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream libnet-cidr-set-perl package and not the libnet-cidr-set-perl package as distributed by Debian.
See How to fix? for Debian:13 relevant fixed versions and status.
Net::CIDR::Set versions through 0.20 for Perl did not validate IP addresses.
The add method called the _encode method to parse addresses. If the addresses did not look like netmasks or network ranges, then they were assumed to single IP addresses and passed back to itself as a 32-bit or 128-bit netmask.
If the argument was not a well-formed IP address, then this would lead to indefinite recursion.
An attacker could use this to cause a denial of service.