🛡️ CVE-2026-15812 on Ubuntu — kronosnet

⚪ Unknown ✅ No Known Exploit OSV

N/A

CVSS Score

0 Low4 Medium7 High9 Critical10

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.

Distribution advisory

This page covers CVE-2026-15812 as tracked by Ubuntu, for the package kronosnet. No fixed version has been recorded for this distribution yet.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is high, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity low, availability low.

Weakness class

UBUNTU-CVE-2026-15812 is classified as CWE-290: Authentication Bypass by Spoofing. Identity is inferred from something an attacker can forge, such as a header or address.

Affected software

UBUNTU-CVE-2026-15812 is recorded against 1 package.

kronosnet

Timeline and source

Published on 21 July 2026 and last revised on 29 July 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

ubuntu.com (Report)
www.cve.org (Report)

Details

Severity Unknown

CVSS Score N/A

CVSS Vector CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L

CWE N/A

Public Exploit ✅ No

Source OSV

Published 2026-07-21

Updated 2026-08-11

Modified 2026-07-29

Fix URL N/A

Affected Packages

Software	From version	Fixed in
kronosnet	—	—

References

REPORT https://ubuntu.com/security/CVE-2026-15812

REPORT https://www.cve.org/CVERecord?id=CVE-2026-15812

🔗 NVD 🔗 Mitre

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