CVE-2026-15812

Name	CVE-2026-15812
Description	A vulnerability was found in the internal Access Control List (ACL) subsystem of kronosnet (Version affected: <= 1.34). When the framework is explicitly configured to manage dynamic links (accepting network traffic from any IP address) without network payload encryption, the validation architecture implicitly trusts the link ID provided within incoming data packets. A remote, unauthenticated attacker can exploit this lack of validation by spoofing a legitimate link ID inside crafted network frames. This allows the attacker to fully bypass the ACL framework and inject arbitrary data packets into the application layer, potentially leading to data corruption or service instabilities.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs	1142847

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
kronosnet (PTS)	bullseye	1.20-4	vulnerable
	bookworm	1.25-1	vulnerable
	trixie	1.31-1	vulnerable
	forky, sid	1.33-1	vulnerable

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
kronosnet	source	(unstable)	(unfixed)			1142847

Notes

[trixie] - kronosnet <no-dsa> (Minor issue)
[bookworm] - kronosnet <postponed> (Minor issue)
[bullseye] - kronosnet <postponed> (Minor issue)
https://bugzilla.redhat.com/show_bug.cgi?id=2500851