CVE-2026-89775

CVE-2026-89775 affects the Linux kernel in the KVM arm64 subsystem. When the S1 MMU is disabled, the page-table walk level is set to −127 (S1_MMU_DISABLED), but pgshift_level_to_ttl() casts it to an unsigned 8-bit value, yielding an invalidation size of 0 during VNCR TLB evaluation. This can leav...

RLSA-2026:67469 Important: kernel-rt security update

The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. Security Fixes: kernel: EDAC/bluefield: Fix potential integer overflow CVE-2024-53161 kernel: wifi: mac80211: Discard Beacon frames to non-broadcast addre...

PT-2026-93567

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the KVM s390 architecture within the import wp info function. The len field of the kvm hw breakpoint structure, which is controlled by user space, is assigned to an...

PT-2026-93556

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the KVM arm64 implementation regarding the global VNCR mapping counter. This counter is used to determine if an L1 provided VNCR page is mapped in L0 during TLB...

PT-2026-93555

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the KVM arm64 component where the decode range tlbi function failed to perform the required sign extension for Virtual Address VA during range-based Translation...

PT-2026-93569

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the KVM x86 MMU where the kvm rmap lock function elides the rmap lock when an empty rmap is observed. The kvm rmap age gfn range function ignores the returned value an...

CVE-2026-89919: Undefined Security Weakness

In the Linux kernel, the following vulnerability has been resolved: KVM: s390: keyop: use mmulock to read gmap-asce Every other dat consumer in this file kvms390getskeys, setskeys, getcmmabits, setcmmabits, MEMCLRCMMA, kvms390fixupprefix, kvmtestagegfn, kvmagegfn reads kvm-arch.gmap-asce inside t...

PT-2026-93560

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the KVM s390 component where the keyop function fails to use the mmu lock when reading gmap-asce. Because gmap-asce is modified under a write lock by the gmap set limi...

PT-2026-93562

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description In the KVM s390 component, the kvm inject pfault token function fails to fully initialize the kvm s390 irq structure on the stack. While .type and .u.ext.ext params2 are set, the ext...

PT-2026-93554

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description In the Linux kernel KVM arm64 vgic-v3 component, the vgic v3 save pending tables function iterates through dist-lpi xa using xa for each and dereferences the returned struct vgic irq...

PT-2026-93572

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the KVM nVMX component where the KVM REQ GET NESTED STATE PAGES flag is not consistently cleared during a nested VM-Exit emulation. This occurs even when KVM is built...

PT-2026-93601

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description A use-after-free issue exists in the s390 vfio-ap component. In the vfio ap mdev set kvm function, the kvm-arch.crypto.pqap hook pointer is assigned before update locks are acquired and...

PT-2026-93553

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the KVM arm64 vgic-its component where the vgic its save ite function unconditionally dereferences a NULL collection. This occurs when a guest issues a sequence of MAP...

PT-2026-93557

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the KVM arm64 implementation where VNCR Virtual Non-Global Control Register TLB invalidation does not correctly participate in the MMU invalidation retry mechanism. Th...

PT-2026-93566

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description A memory leak exists in the KVM s390 guest debug handling. The bp data variable is only freed during error cases via the kfreebp data function, causing bp data to leak during every...

PT-2026-93681

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the KVM SEV implementation where the SNP VMSA Virtual Machine Save Area is not forcefully invalidated when its backing gmem page is zapped, such as during a PUNCH HOLE...

PT-2026-93558

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description A race condition exists in the KVM arm64 component between VNCR TLB invalidation and the vcpu put function during VNCR page unmapping. The issue arises because TLB invalidation occurs...

CVE-2026-90040: Undefined Security Weakness

In the Linux kernel, the following vulnerability has been resolved: KVM: SEV: Forcefully invalidate SNP VMSA if its backing gmem page is zapped Wire up a gmeminvalidaterange call for SNP VMs, and use it to force vCPUs to reload/recheck their guest-provided VMSA if the backing gmem page is being...

CVE-2026-89958: Undefined Security Weakness

In the Linux kernel, the following vulnerability has been resolved: s390/vfio-ap: Fix dereference matrixmdev-kvm without checking for NULL The apdriver structure has two fields which are function pointers to callbacks: .onconfigchanged: called at the start of the AP bus scan function to notify th...

CVE-2026-89957: Undefined Security Weakness

In the Linux kernel, the following vulnerability has been resolved: s390/vfio-ap: Fix hot-unplug skipped when last AP adapter or domain removed The vfioapmdevhotunplugcfg function uses the return value of bitmapandnot to determine whether the guest APCB needs to be updated. However, bitmapandnot...