Vulnerability in Red Hat Enterprise Linux 10

CVE-2026-15812

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.

EPSS: 0.003 (17.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-15812?
CVE-2026-15812 is a medium-severity vulnerability in Red Hat Enterprise Linux 10, classified under Authentication Bypass by Spoofing. CVSS score: 4.8/10. Published 2026-07-21.
How severe is CVE-2026-15812?
Medium severity. CVSS v3 base score is 4.8 out of 10.