# 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.

- Web page: https://patchblox.com/security/cve/CVE-2026-15812
- Priority: Routine
- CVSS: 4.8 (medium)
- EPSS: 0.0026
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jul 21, 2026

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | kronosnet Debian 14 | 1.35-1 | [DEBIAN-CVE-2026-15812](https://patchblox.com/security/data/fix/linux/debian-cve-2026-15812.md) | Jul 21, 2026 |
| Linux | kronosnet opensuse-leap 16.0 | 1.30-160000.4.1 | [OPENSUSE-SU-2026:21851-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21851-1.md) | Sep 15, 2026 |
| Linux | kronosnet sles 16.0 | 1.30-160000.4.1 | [SUSE-SU-2026:23782-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-23782-1.md) | Sep 15, 2026 |

---

Data as of 2026-11-09T01:18:40Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.