libnet-cidr-set-perl: Net::CIDR::Set versions through 0.20 for Perl did not validate network masks
CVE-2026-49942 is fixed in libnet-cidr-set-perl on 1 platform, first by DEBIAN-CVE-2026-49942, released June 24, 2026. It is not reported as exploited. Patch Radar priority: High.
Net::CIDR::Set versions through 0.20 for Perl did not validate network masks. The mask portion of a network mask could contain Unicode digits such as the Arabic-Indic One (U+0661), or non-digits, which were ignored. This could allow network masks to accept larger networks. Leading zeros were also accepted, but treated as decimal instead of octal. This could lead to confusion about what networks are acceptable.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| libnet-cidr-set-perl · Debian 13.5 (trixie) | 0.15-1+deb13u1 | DEBIAN-CVE-2026-49942 | Jun 24, 2026 |
| libnet-cidr-set-perl · Debian 14 | 0.21-1 | DEBIAN-CVE-2026-49942 | Jun 24, 2026 |
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