CVE-2026-4932

IBM PowerVM Hypervisor vulnerability CVE-2026-4932 affects FW1110.00–FW1110.20 and FW1060.00–FW1060.71. Affects PowerVM Hypervisor and TME hardware; attacker with physical access to Transparent Memory Encryption could decrypt memory due to insufficient cryptographic entropy. Impact is high confid...

Security Bulletin: This Power System update is being released to address CVE-2026-4932

Summary A firmware issue was identified where the generated AES key used to initialize the Transparent Memory Encryption TME hardware has weakened encryption strength. Vulnerability Details CVEID:CVE-2026-4932 DESCRIPTION: PowerVM Hypervisor could allow an attacker with physical access to the...

CVE-2026-64104

In the Linux kernel, the following vulnerability has been resolved: virt: sev-guest: Explicitly leak pages in unknown state When setmemoryencrypted,decrypted fail, the user cannot know at which point the function failed, meaning that the pages are left in an unknown state from the point of view o...

CVE-2026-64104 virt: sev-guest: Explicitly leak pages in unknown state

In the Linux kernel, the following vulnerability has been resolved: virt: sev-guest: Explicitly leak pages in unknown state When setmemoryencrypted,decrypted fail, the user cannot know at which point the function failed, meaning that the pages are left in an unknown state from the point of view o...

CVE-2026-64104

CVE-2026-64104 (Linux kernel) affects virt: sev-guest where set_memory_encrypted()/set_memory_decrypted() can fail leaving pages in an unknown state, potentially unencrypted and not safely returnable to the buddy allocator. The provided documentation notes that to avoid this, the pages should not...

PT-2026-61421

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the sev-guest component of the virt subsystem. When the set memory encrypted or set memory decrypted functions fail, the caller cannot determine the exact point of...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: arm64/fpsimd: Signal: Fix for restoring SVE context When SME is supported, restoring the SVE signal context can fail in several ways. This can result in the task being placed in an invalid state, where the kernel might read from...

Linux Distros Unpatched Vulnerability : CVE-2026-31592

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - KVM: SEV: Protect all of sevmemencregisterregion with kvm-lock Take and hold kvm-lock for before checking sevguest in sevmemencregisterregion, as sevguest isn't...

KVM: SEV: Drop WARN on large size for KVM_MEMORY_ENCRYPT_REG_REGION

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SUSE CVE-2026-31590

In the Linux kernel, the following vulnerability has been resolved: KVM: SEV: Drop WARN on large size for KVMMEMORYENCRYPTREGREGION Drop the WARN in sevpinmemory on npages overflowing an int, as the WARN is comically trivially to trigger from userspace, e.g. by doing: struct kvmencregion range =...

CVE-2026-31593

In the Linux kernel, the following vulnerability has been resolved: KVM: SEV: Reject attempts to sync VMSA of an already-launched/encrypted vCPU Reject synchronizing vCPU state to its associated VMSA if the vCPU has already been launched, i.e. if the VMSA has already been encrypted. On a host wit...

CVE-2026-31593 KVM: SEV: Reject attempts to sync VMSA of an already-launched/encrypted vCPU

In the Linux kernel, the following vulnerability has been resolved: KVM: SEV: Reject attempts to sync VMSA of an already-launched/encrypted vCPU Reject synchronizing vCPU state to its associated VMSA if the vCPU has already been launched, i.e. if the VMSA has already been encrypted. On a host wit...

CVE-2026-31593

CVE-2026-31593 is a Linux kernel KVM SEV SNP issue. The vulnerability arises when updating an already-launched and encrypted vCPU state: attempting to sync the vCPU's VMSA can trigger an SEV-SNP cryptographic memory protection (RMP) violation, causing a host panic/DoS. Technical details across mu...

CVE-2026-31592 KVM: SEV: Protect *all* of sev_mem_enc_register_region() with kvm->lock

In the Linux kernel, the following vulnerability has been resolved: KVM: SEV: Protect all of sevmemencregisterregion with kvm-lock Take and hold kvm-lock for before checking sevguest in sevmemencregisterregion, as sevguest isn't stable unless kvm-lock is held or KVM can guarantee KVMSEVINIT2 has...

CVE-2026-31592

CVE-2026-31592 affects the Linux kernel KVM subsystem. The vulnerability arises when sev_mem_enc_register_region() is not protected by kvm->lock before sev_guest() is checked, risking state corruption if KVM_INIT{2} fails and an uninitialized sev->regions_list is touched, potentially causin...

CVE-2026-31592

In the Linux kernel, the following vulnerability has been resolved: KVM: SEV: Protect all of sevmemencregisterregion with kvm-lock Take and hold kvm-lock for before checking sevguest in sevmemencregisterregion, as sevguest isn't stable unless kvm-lock is held or KVM can guarantee KVMSEVINIT2 has...

EUVD-2026-25485

In the Linux kernel, the following vulnerability has been resolved: KVM: SEV: Protect all of sevmemencregisterregion with kvm-lock Take and hold kvm-lock for before checking sevguest in sevmemencregisterregion, as sevguest isn't stable unless kvm-lock is held or KVM can guarantee KVMSEVINIT2 has...

CVE-2026-31590

The CVE-2026-31590 issue affects the Linux kernel KVM SEV path: sev_pin_memory() would WARN when npages overflowed an int due to KVM_MEMORY_ENCRYPT_REG_REGION with a large size, enabling a local user to trigger a harmless warning via userspace input (e.g., addr=0, size=-1ul). The root cause is th...

CVE-2026-31590

In the Linux kernel, the following vulnerability has been resolved: KVM: SEV: Drop WARN on large size for KVMMEMORYENCRYPTREGREGION Drop the WARN in sevpinmemory on npages overflowing an int, as the WARN is comically trivially to trigger from userspace, e.g. by doing: struct kvmencregion range =...

CVE-2026-31590 KVM: SEV: Drop WARN on large size for KVM_MEMORY_ENCRYPT_REG_REGION

In the Linux kernel, the following vulnerability has been resolved: KVM: SEV: Drop WARN on large size for KVMMEMORYENCRYPTREGREGION Drop the WARN in sevpinmemory on npages overflowing an int, as the WARN is comically trivially to trigger from userspace, e.g. by doing: struct kvmencregion range =...