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 products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | — | — |
| Red Hat | Red Hat Enterprise Linux 8 | — | — |
| Red Hat | Red Hat Enterprise Linux 9 | — | — |
| Red Hat | Red Hat OpenShift Container Platform 4 | — | — |
| Red Hat | Red Hat OpenShift Container Platform 5 | — | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | kronosnet | 1.35-1 | — |
| Debian 13 | kronosnet | No fix yet | — |
| Debian 12 | kronosnet | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | kronosnet | No fix yet | — |
| Ubuntu 26.04 LTS | kronosnet | No fix yet | — |
| Ubuntu 24.04 LTS | kronosnet | No fix yet | — |
| Ubuntu 22.04 LTS | kronosnet | No fix yet | — |
| Ubuntu 20.04 LTS | kronosnet | No fix yet | — |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | kronosnet | No fix yet | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 16.0 | kronosnet | 1.30-160000.4.1 | SUSE-SU-2026:23792-1 |
| SLES 16.0 | kronosnet | 1.30-160000.4.1 | SUSE-SU-2026:23782-1 |
| SLE Micro 6.2 | kernel-livepatch-SLE16-RT_Update_15 | 3-160000.1.1 | SUSE-SU-2026:23792-1 |
| SLE Micro 6.2 | rpm | 4.20.1-160000.3.1 | SUSE-SU-2026:23782-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | kronosnet | 1.33-2.1 | openSUSE-SU-2026:11364-1 |
| openSUSE Leap 16.0 | kronosnet | 1.30-160000.4.1 | openSUSE-SU-2026:21851-1 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | kronosnet | No fix yet | — |
Advisories 4
- SUSE-SU-2026:23792-1 Security update for kronosnet SUSE / openSUSE Security Updates · Sep 27, 2026
- SUSE-SU-2026:23782-1 Security update for kronosnet SUSE / openSUSE Security Updates · Sep 27, 2026
- openSUSE-SU-2026:21851-1 Security update for kronosnet SUSE / openSUSE Security Updates · Sep 17, 2026
- openSUSE-SU-2026:11364-1 libknet-devel-1.33-2.1 on GA media SUSE / openSUSE Security Updates · Jul 25, 2026
References
- https://access.redhat.com/security/cve/CVE-2026-15811 vdb-entry
- RHBZ#2500849 issue-tracking