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Fencer Vulns
medium 5.8

CVE-2026-15811 json

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

published 2026-07-21 3 mo ago modified 2026-11-06 2 d ago also EUVD-2026-46153

cvss
5.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.1%
EPSS 0.1% chance of exploitation in 30 days, percentile 0%
public exploits
0
none known

Summary

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.

Patch / fix

  • kronosnet Debian 14 1.35-1

debian advisories DEBIAN-CVE-2026-15811

  • kronosnet SLE High Availability Extension 16.0, SLES for SAP applications 16.0 1.30-160000.4.1
  • rpm Linux Micro Extras 6.2 4.20.1-160000.3.1
  • kernel-livepatch-SLE16-RT_Update_15 Linux Micro 6.2 3-160000.1.1

suse advisories SUSE-SU-2026:23782-1SUSE-SU-2026:23792-1

  • kronosnet openSUSE Leap 16.0 1.30-160000.4.1
  • kronosnet openSUSE Tumbleweed 1.33-2.1

opensuse advisories openSUSE-SU-2026:21851-1openSUSE-SU-2026:11364-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-15811 updated cvss 5.8

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

  • Red Hat Enterprise Linux 8 libknet1, libnozzle1, libknet1-plugins-all, libknet1-crypto-nss-plugin, libknet1-crypto-plugins-all, libknet1-compress-lz4-plugin, +6 more Red Hat Enterprise Linux 9 libknet1, libnozzle1, libknet1-plugins-all, libknet1-crypto-nss-plugin, libknet1-crypto-plugins-all, libknet1-compress-lz4-plugin, +7 more Red Hat Enterprise Linux 10 kronosnet Red Hat OpenShift Container Platform 4 openshift/ose-rhel-coreos-9 Red Hat OpenShift Container Platform 5 openshift/ose-rhel-coreos-9
    affected: no fix available “Fix deferred”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
3 mo ago

Exploit prediction

0.08% chance of exploitation in the next 30 days, higher than 0% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 5.8 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:L

Affected products

  • 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

Classification

Weakness
  • CWE-212 Improper Removal of Sensitive Information Before Storage or Transfer

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.