CVE-2026-15811 Kronosnet: kronosnet: encryption key exposure in memory after cryptographic configuration changes
Local attackers can retrieve encryption keys from memory to decrypt cluster traffic or disrupt high-availability clusters in Red Hat Enterprise Linux.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-15811?
CVE-2026-15811 is a medium-severity vulnerability in Red Hat Enterprise Linux 10, published on 21 Jul 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A vulnerability was found in kronosnet's (version <=1.34) cryptographic configuration management. The framework does not correctly zero-out or wipe sensitive memory segments after executing changes to its cryptographic configuration. This omission leaves raw encryption keys resident in memory after the associated structures are freed. A local attacker capable of leveraging memory disclosure techniques could exploit this flaw to retrieve the active encryption key, allowing them to decrypt cluster network communications or inject malicious packets to cause severe high-availability cluster instability.
Weakness: CWE-212
Which versions are affected by CVE-2026-15811?
How do I fix CVE-2026-15811?
Apply the vendor's patch.
Is CVE-2026-15811 being exploited?
There is no known exploitation of CVE-2026-15811 in the wild and no public exploit code.
Sources
Also known as AZL-93090, DEBIAN-CVE-2026-15811, GHSA-3p9p-8j59-v9h3, UBUNTU-CVE-2026-15811.