[QSA-0515261]
Linux kernel vulnerabilities

Qlustar Security Advisory 0515261

May 15th, 2026

Summary:

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

Package(s)       : linux-image-ql-generic,
                   qlustar-module-core-jammy-amd64-13.4,
                   qlustar-module-core-noble-amd64-14.1
Qlustar releases : 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 6.12.85. They may lead to a denial of service or privilege escalation.

The most recent qlustar kernel 6.12.89-ql-generic-14-9 also contains a fix for the recently discovered DirtyFrag as well as for the CVE-2026-46333 vulnerability.

Please check the following web pages that contain details of the fixes in each release after 6.12.85 up to the current Qlustar kernel 6.12.89:

Linux kernel 6.12.89
Linux kernel 6.12.88
Linux kernel 6.12.87
Linux kernel 6.12.86

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 5.15.204. 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 5.15.204 up to the current Qlustar kernel 5.15.207:

The most recent qlustar 5.15.207-ql-generic-13.0-28 also contains a fix for the recently discovered DirtyFrag (CVE-2026-31431) vulnerability.

Linux kernel 5.15.207
Linux kernel 5.15.206
Linux kernel 5.15.205

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                     6.12.89-ql-generic-14-10
qlustar-module-core-noble-amd64-14.1       14.1.3-b589f1626

For Qlustar 13

linux-image-ql-generic                     5.15.207-ql-generic-13.0-28
qlustar-module-core-jammy-amd64-13.4       13.4.3-b588f1625

Special Update instructions:

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