CVE-2026-63794

A flaw was found in the Linux kernel's Kernel-based Virtual Machine KVM module, specifically within the Secure Virtual Machine SVM component. The sevdbgcrypt function, when handling encryption, incorrectly calculates the transfer length, leading to a page overflow. This memory corruption can resu...

Linux Distros Unpatched Vulnerability : CVE-2026-64106

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - KVM: arm64: vgic-its: Reject restored DTE with out-of-range numeventidbits Userspace can restore an ITS Device Table Entry whose Size field encodes more EventID...

CVE-2026-64105

In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: vgic: Free privateirqs when init fails after allocation Companion to commit 250f25367b58 "KVM: arm64: Tear down vGIC on failed vCPU creation", which added the missing kvmvgicvcpudestroy call to the kvmsharehyp failure...

CVE-2026-63939

In the Linux kernel, the following vulnerability has been resolved: KVM: SEV: Compute the correct max length of the in-GHCB scratch area When setting the length of the GHCB scratch area, and the area is in the GHCB shared buffer, set the effective length of the scratch area to the max possible si...

CVE-2026-64172 KVM: SVM: Disable AVIC IPI virtualization on Hygon Family 18h (erratum #1235)

In the Linux kernel, the following vulnerability has been resolved: KVM: SVM: Disable AVIC IPI virtualization on Hygon Family 18h erratum 1235 Hygon Family 18h CPUs are derived from AMD Family 17h Zen1 silicon and share the same erratum 1235: hardware may read a stale IsRunning=1 bit during ICR...

EUVD-2026-45791

In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: vgic-its: Reject restored DTE with out-of-range numeventidbits Userspace can restore an ITS Device Table Entry whose Size field encodes more EventID bits than the virtual ITS supports. The live MAPD path rejects that...

CVE-2026-64105

In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: vgic: Free privateirqs when init fails after allocation Companion to commit 250f25367b58 "KVM: arm64: Tear down vGIC on failed vCPU creation", which added the missing kvmvgicvcpudestroy call to the kvmsharehyp failure...

CVE-2026-63941

In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: Correctly cap ZCREL2 provided by a guest hypervisor ZCREL2 can be updated by a VHE guest hypervisor either using ZCREL2 which traps or ZCREL1 which does not trap. KVM handles both in different way: - on ZCREL2 trap,...

CVE-2026-63940 KVM: SEV: Ignore Port I/O requests of length '0'

In the Linux kernel, the following vulnerability has been resolved: KVM: SEV: Ignore Port I/O requests of length '0' Explicitly ignore Port I/O requests of length '0' or count '0', so that setting up the software scratch area and other code doesn't have to worry about underflowing the length, and...

CVE-2026-63939 KVM: SEV: Compute the correct max length of the in-GHCB scratch area

In the Linux kernel, the following vulnerability has been resolved: KVM: SEV: Compute the correct max length of the in-GHCB scratch area When setting the length of the GHCB scratch area, and the area is in the GHCB shared buffer, set the effective length of the scratch area to the max possible si...

CVE-2026-63938 KVM: SEV: Check PSC request indices against the actual size of the buffer

In the Linux kernel, the following vulnerability has been resolved: KVM: SEV: Check PSC request indices against the actual size of the buffer When processing Page State Change PSC requests, validate the PSC buffer against the effective size of the scratch area, which could be less than the maximu...

EUVD-2026-45712

In the Linux kernel, the following vulnerability has been resolved: KVM: SEV: Compute the correct max length of the in-GHCB scratch area When setting the length of the GHCB scratch area, and the area is in the GHCB shared buffer, set the effective length of the scratch area to the max possible si...

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-2026-45472

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 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

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-2026-63807 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...

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 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...

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...