CVE-2026-63937

In the Linux kernel, CVE-2026-63937 pertains to KVM SEV where entries/indices in the guest-accessible PSC Page State Change buffer are now read with READ_ONCE() to defend against TOCTOU bugs. This change targets misbehavior by guests and reduces potential timing-related issues when the buffer is ...

CVE-2026-63937 KVM: SEV: Use READ_ONCE() when reading entries/indices from PSC buffer

In the Linux kernel, the following vulnerability has been resolved: KVM: SEV: Use READONCE when reading entries/indices from PSC buffer Use READONCE when reading entries/indices from the guest-accessible Page State Change buffer to defend against TOCTOU bugs. Don't bother with READONCE/WRITEONCE...

EUVD-2026-45710

In the Linux kernel, the following vulnerability has been resolved: KVM: SEV: Use READONCE when reading entries/indices from PSC buffer Use READONCE when reading entries/indices from the guest-accessible Page State Change buffer to defend against TOCTOU bugs. Don't bother with READONCE/WRITEONCE...

CVE-2026-63807 KVM: x86/mmu: Ensure hugepage is in by slot before checking max mapping level

In the Linux kernel, the following vulnerability has been resolved: KVM: x86/mmu: Ensure hugepage is in by slot before checking max mapping level When recovering hugepages in the shadow MMU, verify that the base gfn of the shadow page is actually contained within the target memslot, before queryi...

EUVD-2026-45472

In the Linux kernel, the following vulnerability has been resolved: KVM: Replace guest-triggerable BUGON in ioeventfd datamatch with getunaligned Drop a BUGON that has been reachable since it was first added, way back in 2009, and instead use getunaligned to perform potentially-unaligned accesses...

CVE-2026-63806

CVE-2026-63806 relates to the Linux kernel KVM ioeventfd datamatch bug. The issue occurs when a guest store spans multiple pages and hits MMIO on the second page, potentially triggering a datamatch IO event due to an alignment check in a 32-byte destination pointer; the code used a BUG_ON() with ...

CVE-2026-63806 KVM: Replace guest-triggerable BUG_ON() in ioeventfd datamatch with get_unaligned()

In the Linux kernel, the following vulnerability has been resolved: KVM: Replace guest-triggerable BUGON in ioeventfd datamatch with getunaligned Drop a BUGON that has been reachable since it was first added, way back in 2009, and instead use getunaligned to perform potentially-unaligned accesses...

CVE-2026-63806 KVM: Replace guest-triggerable BUG_ON() in ioeventfd datamatch with get_unaligned()

In the Linux kernel, the following vulnerability has been resolved: KVM: Replace guest-triggerable BUGON in ioeventfd datamatch with getunaligned Drop a BUGON that has been reachable since it was first added, way back in 2009, and instead use getunaligned to perform potentially-unaligned accesses...

CVE-2026-63794

In the Linux kernel, the following vulnerability has been resolved: KVM: SVM: Fix page overflow in sevdbgcrypt for ENCRYPT path In sevdbgcrypt, the per-iteration transfer length is bounded by the source page offset PAGESIZE - soff but not by the destination page offset PAGESIZE - doff. When doff...

CVE-2026-63794

The CVE-2026-63794 issue affects the Linux kernel KVM SEV path (sev_dbg_crypt) where the ENCRYPT path could overflow a single-page buffer when d_off > s_off, because the per-iteration transfer length wasn’t bounded by the destination page offset. The root cause is that len was bounded by (PAGE...

EUVD-2026-45460

In the Linux kernel, the following vulnerability has been resolved: KVM: SVM: Fix page overflow in sevdbgcrypt for ENCRYPT path In sevdbgcrypt, the per-iteration transfer length is bounded by the source page offset PAGESIZE - soff but not by the destination page offset PAGESIZE - doff. When doff...

CVE-2026-63794 KVM: SVM: Fix page overflow in sev_dbg_crypt() for ENCRYPT path

In the Linux kernel, the following vulnerability has been resolved: KVM: SVM: Fix page overflow in sevdbgcrypt for ENCRYPT path In sevdbgcrypt, the per-iteration transfer length is bounded by the source page offset PAGESIZE - soff but not by the destination page offset PAGESIZE - doff. When doff...

PT-2026-61255

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the KVM SEV component when processing Page State Change PSC requests. The system fails to properly validate the PSC buffer against the effective size of the scratch...

PT-2026-61256

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the KVM SEV implementation regarding the calculation of the maximum length of the in-GHCB scratch area. When the scratch area is located within the GHCB shared buffer,...

PT-2026-61489

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the KVM SVM implementation for Hygon Family 18h CPUs. Due to a hardware erratum, the system may read a stale IsRunning=1 bit during ICR write emulation. This causes a...

PT-2026-61074

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the iommu/vt-d component where the kernel lacks dirty tracking support on nested domains attached to a Process Address Space ID PASID. A PASID is a unique identifier...

PT-2026-61423

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 restore dte function fails to validate the Size field of a restored ITS Device Table Entry DTE. This allows userspa...

PT-2026-61258

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the KVM arm64 implementation regarding how the ZCR EL2 register is handled for VHE guest hypervisors. When a guest hypervisor updates ZCR EL2 via ZCR EL1, the value is...

PT-2026-61122

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the KVM x86 emulator where a guest can trigger a BUG ON in the ioeventfd datamatch process. This occurs when a guest emits a store that splits a page starting at page...

Linux Distros Unpatched Vulnerability : CVE-2026-63806

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - KVM: Replace guest-triggerable BUGON in ioeventfd datamatch with getunaligned Drop a BUGON that has been reachable since it was first added, way back in 2009, a...