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-2026-93559

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the KVM arm64 component regarding Translation Lookaside Buffer TLB invalidation by Virtual Address VA. The system compares two ranges—one defined by the TLB and one by...

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-2026-93571

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the KVM nVMX component where local TLB flushes are not serviced when a nested VM-Enter fails, such as during failed VMCS checks in the nested vmx enter non root mode...

CVE-2026-89930: Undefined Security Weakness

In the Linux kernel, the following vulnerability has been resolved: KVM: nVMX: Service local TLB flushes on failed nested VM-Enter KVM services local TLB flushes on "full" nested VM-Exits through nestedvmxvmexit, but not if a nested VM-Enter fails e.g. due to failed VMCS checks in...

Linux Distros Unpatched Vulnerability : CVE-2026-89811

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - drm/amdkfd: Add TLB flush after MES queue eviction/suspension MES Micro Engine Scheduler does not perform heavy-weight TLB invalidation after unmapping queues,...

CVE-2026-89932: Undefined Security Weakness

In the Linux kernel, the following vulnerability has been resolved: KVM: nVMX: Always flush vpid02 on first use Make sure vpid02 is always flushed on first use by setting lastvpid=0 when allocating vpid02. nestedvmxtransitiontlbflush will always detect a VPID change on first VM-Enter after VMXON,...

CVE-2026-89929: Undefined Security Weakness

In the Linux kernel, the following vulnerability has been resolved: KVM: nVM: Ensure INVVPID is emulated on the correct physical CPU When emulating INVVPID, KVM executes INVVPID on the physical CPU using vpid02 instead of the L1 assigned VPID, after doing some validations on the operands. However...

PT-2026-93573

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the KVM nVMX component where vpid02 is not consistently flushed upon first use. This occurs because last vpid is not reset when vpid02 is freed during a VMXOFF...

CVE-2026-89918: Undefined Security Weakness

In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: Correctly handle end of VA space TLBI invalidation Our TLB invalidation by VA code is based on comparing two ranges, one defined by the TLB, and one defined by the TLBI instruction. Each range is defined by a start an...

CVE-2026-89775: Undefined Security Weakness

In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: Handle negative S1 walk levels in VNCR TLB size evaluation Computing the effects of a TLB invalidation involves looking at the size of the mapping cached by the TLB. For S1 mappings such as VNCR, this is deducted from...

CVE-2026-89914: Undefined Security Weakness

In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: Sign-extend VA for range-based TLBI invalidation When the decoderangetlbi helper was moved to be used for S1 TLBIs, the required sign extension was omitted. Add it. As a result, special care must be taken to not...

PT-2026-93570

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the KVM nested VM nVM implementation where the INVVPID instruction may be emulated on an incorrect physical CPU. When emulating INVVPID, KVM uses vpid02 on the current...

Xen: Stale TLB Entry Ahead of Page Scrubbing (XSA-511)

x86 PV guests can free memory pages while still keeping a stale TLB entry pointing to them. A TLB flush is only issued by Xen if needed when the page is re-used. Since it's possible for the page to be scrubbed ahead of the TLB flush, there's a window where a PV guest can modify an already scrubbe...

SUSE CVE-2026-79603

x86 PV guests can free memory pages while still keeping a stale TLB entry pointing to them. A TLB flush is only issued by Xen if needed when the page is re-used. Since it's possible for the page to be scrubbed ahead of the TLB flush, there's a window where a PV guest can modify an already scrubbe...

CVE-2026-79603

A flaw was found in Xen. x86 paravirtualized PV guests can free memory pages while a stale Translation Lookaside Buffer TLB entry still points to them. This creates a window where a PV guest can modify a page after it has been scrubbed cleared but before the TLB is flushed. This could lead to dat...

CVE-2026-79603

x86 PV guests can free memory pages while still keeping a stale TLB entry pointing to them. A TLB flush is only issued by Xen if needed when the page is re-used. Since it's possible for the page to be scrubbed ahead of the TLB flush, there's a window where a PV guest can modify an already scrubbe...

ALPINE-CVE-2026-79603

x86 PV guests can free memory pages while still keeping a stale TLB entry pointing to them. A TLB flush is only issued by Xen if needed when the page is re-used. Since it's possible for the page to be scrubbed ahead of the TLB flush, there's a window where a PV guest can modify an already scrubbe...

DEBIAN-CVE-2026-79603

x86 PV guests can free memory pages while still keeping a stale TLB entry pointing to them. A TLB flush is only issued by Xen if needed when the page is re-used. Since it's possible for the page to be scrubbed ahead of the TLB flush, there's a window where a PV guest can modify an already scrubbe...

Security update for xen

This update for xen fixes the following issues: CVE-2026-62437: x86: DMs may cause mem leak by IRQ binding bsc1276838. CVE-2026-79602: x86: improper handling of HVM emulation return codes bsc1276839. CVE-2026-79603: unconditionally do TLB flushing ahead of page scrubbing bsc1276841. Special...