Vulnerability · Published Jul 21, 2026 · Assigned by redhat
CVE-2026-15811Kronosnet: kronosnet: encryption key exposure in memory after cryptographic configuration changes
Medium 5.8
In plain English
A medium-severity security flaw in Red Hat Enterprise Linux 10 from Red Hat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 0% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | kronosnet | no fix listed | DEBIAN-CVE-2026-15811 |
| Debian:13 | kronosnet | no fix listed | DEBIAN-CVE-2026-15811 |
| Debian:14 | kronosnet | 1.35-1 | DEBIAN-CVE-2026-15811 |
| Ubuntu:22.04:LTS | kronosnet | no fix listed | UBUNTU-CVE-2026-15811 |
| Ubuntu:24.04:LTS | kronosnet | no fix listed | UBUNTU-CVE-2026-15811 |
| Ubuntu:26.04:LTS | kronosnet | no fix listed | UBUNTU-CVE-2026-15811 |
| Ubuntu:26.10 | kronosnet | no fix listed | UBUNTU-CVE-2026-15811 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | see references |
| Red Hat | Red Hat Enterprise Linux 8 | see references |
| Red Hat | Red Hat Enterprise Linux 9 | see references |
| Red Hat | Red Hat OpenShift Container Platform 4 | see references |
Weakness: CWE-212 · Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:L
References
- https://access.redhat.com/security/cve/CVE-2026-15811 vdb-entry, x_refsource_REDHAT
- RHBZ#2500849 issue-tracking, x_refsource_REDHAT