[QSA-0515251]
Linux kernel vulnerabilities

Qlustar Security Advisory 0515251

May 15th, 2025

Summary:

The system could crash or be made to run programs as an administrator.

Package(s)       : linux-image-ql-generic,
                   qlustar-module-core-focal-amd64-12.0.3,
                   qlustar-module-core-jammy-amd64-13.3,
                   qlustar-module-core-noble-amd64-14.0
Qlustar releases : 12.0, 13, 14
Affected versions: All versions prior to this update
Vulnerability    : privilege escalation/denial of service
Problem type     : local
Qlustar-specific : no
CVE Id(s)        : Not documented

A number of vulnerabilities and bugs have been discovered in the 6.12.x Linux kernel series since the last Qlustar 14 release based on 6.12.25. They may lead to a denial of service or privilege escalation. Please check the following web pages that contain details of the fixes in each release after 6.12.25 up to the current Qlustar kernel 6.12.28:

Linux kernel 6.12.28
Linux kernel 6.12.27
Linux kernel 6.12.26

A number of vulnerabilities and bugs have been discovered in the 5.15.x Linux kernel series since the last Qlustar 13.0 release based on 5.15.179. They may lead to a denial of service or privilege escalation. Please check the following web pages that contain details of the fixes in each release after 5.15.179 up to the current Qlustar kernel 5.15.182:

Linux kernel 5.15.182
Linux kernel 5.15.181
Linux kernel 5.15.180

A number of vulnerabilities and bugs have been discovered in the 5.4.x Linux kernel series since the last Qlustar 12.0 release based on 5.4.291. They may lead to a denial of service or privilege escalation. Please check the following web pages that contain details of the fixes in each release after 5.4.291 up to the current Qlustar kernel 5.4.293:

Linux kernel 5.4.293
Linux kernel 5.4.292

Update instructions:

The problem can be corrected by updating your system to the following or more recent package versions:

For Qlustar 14

linux-image-ql-generic                     6.12.28-ql-generic-14-2
qlustar-module-core-noble-amd64-14.0       14.0.1-b575f1574

For Qlustar 13

linux-image-ql-generic                     5.15.182-ql-generic-13.0-20
qlustar-module-core-jammy-amd64-13.3       13.3.1-b573f1573

For Qlustar 12.0

linux-image-ql-generic                     5.4.293-ql-generic-12.0-40
qlustar-module-core-focal-amd64-12.0.3     12.0.3.12-b566f1572

Please note that Qlustar 12 has reached its EOL now and this is the last security update covering Qlustar 12. An update to Qlustar 13 should be done as soon as possible.

Special Update instructions:

In addition to the steps described in the general Qlustar Update Instructions these updates require the following:

• On Qlustar 12, also perform the following manual steps if you haven’t done so yet: Write the dnsmasq and slurm config with QluMan before rebooting. If your cluster was installed with a release earlier than 12.0.0.8-b546f1425 you will have to generate new LDAP certificates at some point since the earlier ones were generated with a 1 year validity. Now they are generated with an unlimited validity. To check the expiration date execute

  # openssl x509 -dates -in /etc/ssl/certs/qlustar-ca-cert.pem | grep notAfter
  

  To regenerate the certificate with unlimited validity execute

  # qluman-ldap-cli --update-certs
  

  before rebooting the whole cluster.
  Please note that we no longer provide 12.x AlmaLinux 8 modules for Qlustar 12. If you want to use AlmaLinux 8 under Qlustar 12, please switch to the 13.x image modules and create a corresponding chroot for it.