DEBIAN-CVE-2026-19566
- Source
- https://security-tracker.debian.org/tracker/CVE-2026-19566
- Import Source
- https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-19566.json
- JSON Data
- https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-19566
- Upstream
- Published
- 2026-08-12T09:17:29Z
- Modified
- 2026-09-14T17:02:39Z
- Severity
-
- 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- [none]
- Details
-
Net::CIDR::Set versions before 0.23 for Perl allow memory exhaustion and malformed set ranges via unbounded IPv6 prefix lengths. The _encode method accepts any prefix length matching
(0|[1-9][0-9]*)and passes it to _width2bits(), which builds the mask as'1' x ($width + 8), one character per bit. The _inc() method then unpacks the packed mask into a Perl array of one scalar per byte, so the prefix length alone sets the allocation size:::/100000000builds a 100 MB string and a 12.5 million element array. The value being tested is parsed, not just the configured ranges: contains() builds a set from its argument, and _guess_coder() tries the IPv4 coder and then the IPv6 coder, so an IPv4-only set expands an oversized IPv6 prefix length before the mixed address width check rejects it. Any caller that passes untrusted input to contains() or add() can exhaust process memory. A prefix length above 128 is also stored as a range that does not match the requested block: 2001:db8::/129 stringifies back unchanged, contains() of its own base address returns false, and removing it from a set drops the base address while the set still prints as covering it. - References
Affected packages
Debian:12 / libnet-cidr-set-perl
Package
- Name
- libnet-cidr-set-perl
- Purl
- pkg:deb/debian/libnet-cidr-set-perl?arch=source&distro=bookworm
Debian:13 / libnet-cidr-set-perl
Package
- Name
- libnet-cidr-set-perl
- Purl
- pkg:deb/debian/libnet-cidr-set-perl?arch=source&distro=trixie
Debian:14 / libnet-cidr-set-perl
Package
- Name
- libnet-cidr-set-perl
- Purl
- pkg:deb/debian/libnet-cidr-set-perl?arch=source&distro=forky