CVE-2026-72412

The CVE-2026-72412 entry concerns the Linux kernel s390/mm subsystem and the _PAGE_UNUSED (PAGE_UNUSED) PTE bit. Root cause: KVM could set the bit for unmapped guest pages; later paths could leave it set, so present pages might be treated as unused, risking guest corruption. The fix implemented i...

CVE-2026-72412: Undefined Security Weakness

In the Linux kernel, the following vulnerability has been resolved: s390/mm: Fix handling of PAGEUNUSED pte bit The PAGEUNUSED softbit should not really be lying around. Its sole purpose is to signal to trytounmapone and trytomigrateone that the page can be discarded instead of being moved /...

AZL-83786 CVE-2026-31568 affecting package kernel 6.6.157.1-1

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 PGarch1 bit set. That bit is set for...

CVE-2026-31568

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 PGarch1 bit set. That bit is set for...

CVE-2026-31568: Out-of-bounds Read

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 PGarch1 bit set. That bit is set for...

CVE-2025-38733: NULL Pointer Dereference

In the Linux kernel, the following vulnerability has been resolved: s390/mm: Do not map lowcore with identity mapping Since the identity mapping is pinned to address zero the lowcore is always also mapped to address zero, this happens regardless of the relocatelowcore command line option. If the...

kernel:4.18.0 security update

4.18.0-553.30.110.OL8 - Update Oracle Linux certificates Kevin Lyons - Disable signing for aarch64 Ilya Okomin - Oracle Linux RHCK Module Signing Key was added to the kernel trusted keys list olkmodsigningkey.pem Orabug: 29539237 - Update x509.genkey Orabug: 24817676 - Conflict with shim-ia32 and...

CVE-2024-42235

In the Linux kernel, the following vulnerability has been resolved: s390/mm: Add NULL pointer check to crsttablefree basecrstfree crsttablefree used to work with NULL pointers before the conversion to ptdescs. Since crsttablefree can be called with a NULL pointer error handling in crsttableupgrad...

CVE-2024-42235

In the Linux kernel, the following vulnerability has been resolved: s390/mm: Add NULL pointer check to crsttablefree basecrstfree crsttablefree used to work with NULL pointers before the conversion to ptdescs. Since crsttablefree can be called with a NULL pointer error handling in crsttableupgrad...

CVE-2024-42235 s390/mm: Add NULL pointer check to crst_table_free() base_crst_free()

In the Linux kernel, the following vulnerability has been resolved: s390/mm: Add NULL pointer check to crsttablefree basecrstfree crsttablefree used to work with NULL pointers before the conversion to ptdescs. Since crsttablefree can be called with a NULL pointer error handling in crsttableupgrad...

CVE-2024-41021

In the Linux kernel, the following vulnerability has been resolved: s390/mm: Fix VMFAULTHWPOISON handling in doexception There is no support for HWPOISON, MEMORYFAILURE, or ARCHHASCOPYMC on s390. Therefore we do not expect to see VMFAULTHWPOISON in doexception. However, since commit af19487f00f3...

Moderate: Red Hat Security Advisory: kernel security and bug fix update

An update for kernel is now available for Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerability from the...