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.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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. (CVE-2026-31568)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Severity
329149	SUSE SLED15: cluster-md-kmp-default / dlm-kmp-default / gfs2-kmp-default / etc (SUSE-SU-2026:3166-1)	Nessus	SuSE Local Security Checks	medium
320429	openSUSE 16 Security Update : kernel (openSUSE-SU-2026:20912-1)	Nessus	SuSE Local Security Checks	medium
310175	Linux Distros Unpatched Vulnerability : CVE-2026-31568	Nessus	Misc.	high

Detections

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CVE-2026-31568

high

Tenable Plugins

medium

medium

high