Microsoft security update for CVE-2026-31568
🔗 CVE IDs covered (1)
📋 Microsoft's advisory
EchelonGraph does not copy Microsoft's advisory page: its FAQ and remediation text are not shown here. Read the advisory on https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-31568. This page also shows what EchelonGraph holds for CVE-2026-31568, with the description from its CVE record, which the CVE Numbering Authority that assigned the CVE wrote: for a CVE Microsoft assigned, often in the words of Microsoft's own advisory.
🎯 Affected products16
- azl3 kernel 6.6.130.1-3 on Azure Linux 3.0
- azl3 kernel 6.6.134.1-2 on Azure Linux 3.0
- azl3 kernel 6.6.137.1-2 on Azure Linux 3.0
- azl3 kernel 6.6.138.1-1 on Azure Linux 3.0
- azl3 kernel 6.6.139.1-1 on Azure Linux 3.0
- azl3 kernel 6.6.141.1-1 on Azure Linux 3.0
- azl3 kernel 6.6.143.1-1 on Azure Linux 3.0
- azl3 kernel 6.6.144.1-1 on Azure Linux 3.0
- azl3 kernel 6.6.145.2-1 on Azure Linux 3.0
- azl3 kernel 6.6.150.1-1 on Azure Linux 3.0
- azl3 kernel 6.6.152.1-1 on Azure Linux 3.0
- azl3 kernel 6.6.157.1-1 on Azure Linux 3.0
- azl3 kernel 6.6.159.1-1 on Azure Linux 3.0
- azl3 kernel 6.6.161.1-1 on Azure Linux 3.0
- cbl2 kernel 5.15.202.1-1 on CBL Mariner 2.0
- cbl2 kernel 5.15.202.1-1 on CBL-Mariner 2.0
✅ Updates Microsoft lists: 1 update
1 row: one per KB article or update, update type and fixed build. Their details are on Microsoft's advisory.
| KB article | Update | Fixed build |
|---|---|---|
| — | Security Update | — |
🧭 EchelonGraph on CVE-2026-31568
- EchelonGraph score
- 7.1 HIGH
- CISA KEV
- Not listed
- Fix status
- A fix is available — apply it.
Description from the CVE record (CVE.org), as published by its numbering authority
In the Linux kernel, the following vulnerability has been resolved: s390/mm: Add missing secure storage access fixups for donated memory There are special cases where secure storage access exceptions happen in a kernel context for pages that don't have the PG_arch_1 bit set. That bit is set for non-exported guest secure storage (memory) but is absent on storage donated to the Ultravisor since the kernel isn't allowed to export donated pages. Prior to this patch we would try to export the page by calling arch_make_folio_accessible() which would instantly return since the arch bit is absent signifying that the page was already exported and no further action is necessary. This leads to secure storage access exception loops which can never be resolved. With this patch we unconditionally try to export and if that fails we fixup.
Published by kernel.org, the CVE Numbering Authority that assigned CVE-2026-31568, in its CVE record at CVE.org; reused under the CVE Program's Terms of Use (its licence and MITRE's copyright notice are in our Terms of Service).