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OpenAdvisories
Medium · 5.8 CVE-2026-15811 EUVD-2026-46153GHSA-3p9p-8j59-v9h3

Kronosnet: kronosnet: encryption key exposure in memory after cryptographic configuration changes

Published Jul 21, 2026 · Updated Nov 6, 2026 · Assigned by redhat

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

VendorProductAffectedFixed
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.

ReleasePackageFixed inAdvisory
Debian 14 kronosnet 1.35-1 —
Debian 13 kronosnet No fix yet —
Debian 12 kronosnet No fix yet —
ReleasePackageFixed inAdvisory
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)
ReleasePackageFixed inAdvisory
Ubuntu 18.04 LTS kronosnet No fix yet —
ReleasePackageFixed inAdvisory
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
ReleasePackageFixed inAdvisory
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

ReleasePackageFixed inAdvisory
Azure Linux 3 kronosnet No fix yet —

Advisories 4

References