CVE-2026-15812

kronosnet: A vulnerability was found in the internal Access Control List (ACL) subsystem of kronosnet (Version affected: <= 1.34)

CVE-2026-15812 is fixed in kronosnet on 1 platform, first by DEBIAN-CVE-2026-15812, released July 21, 2026. It is not reported as exploited. Patch Radar priority: Routine.

Routine
CVSS
4.8
medium
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0026
17th percentile

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.

Where it's fixed

ProductFixed inFixReleased
Linux
kronosnet · Debian 14 1.35-1 DEBIAN-CVE-2026-15812 Jul 21, 2026
kronosnet · opensuse-leap 16.0 1.30-160000.4.1 OPENSUSE-SU-2026:21851-1 Sep 15, 2026
kronosnet · sles 16.0 1.30-160000.4.1 SUSE-SU-2026:23782-1 Sep 15, 2026

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