CVE-2024-26992

In the Linux kernel, the following vulnerability has been resolved: KVM: x86/pmu: Disable support for adaptive PEBS Drop support for virtualizing adaptive PEBS, as KVM's implementation is architecturally broken without an obvious/easy path forward, and because exposing adaptive PEBS can leak host...

CVE-2024-26992 KVM: x86/pmu: Disable support for adaptive PEBS

In the Linux kernel, the following vulnerability has been resolved: KVM: x86/pmu: Disable support for adaptive PEBS Drop support for virtualizing adaptive PEBS, as KVM's implementation is architecturally broken without an obvious/easy path forward, and because exposing adaptive PEBS can leak host...

CVE-2024-26991 KVM: x86/mmu: x86: Don't overflow lpage_info when checking attributes

In the Linux kernel, the following vulnerability has been resolved: KVM: x86/mmu: x86: Don't overflow lpageinfo when checking attributes Fix KVMSETMEMORYATTRIBUTES to not overflow lpageinfo array and trigger KASAN splat, as seen in the privatememconversionstest selftest. When memory attributes ar...

CVE-2024-26991

CVE-2024-26991 relates to the Linux kernel KVM x86/mmu path. The vulnerability stems from overflow of the lpage_info array when checking attributes during KVM_SET_MEMORY_ATTRIBUTES, which can lead to a vmalloc-out-of-bounds read in hugepage attribute checks (observed as KASAN: vmalloc-out-of-boun...

CVE-2024-26991 KVM: x86/mmu: x86: Don't overflow lpage_info when checking attributes

In the Linux kernel, the following vulnerability has been resolved: KVM: x86/mmu: x86: Don't overflow lpageinfo when checking attributes Fix KVMSETMEMORYATTRIBUTES to not overflow lpageinfo array and trigger KASAN splat, as seen in the privatememconversionstest selftest. When memory attributes ar...

CVE-2024-26991

In the Linux kernel, the following vulnerability has been resolved: KVM: x86/mmu: x86: Don't overflow lpageinfo when checking attributes Fix KVMSETMEMORYATTRIBUTES to not overflow lpageinfo array and trigger KASAN splat, as seen in the privatememconversionstest selftest. When memory attributes ar...

CVE-2024-26991 KVM: x86/mmu: x86: Don't overflow lpage_info when checking attributes

In the Linux kernel, the following vulnerability has been resolved: KVM: x86/mmu: x86: Don't overflow lpageinfo when checking attributes Fix KVMSETMEMORYATTRIBUTES to not overflow lpageinfo array and trigger KASAN splat, as seen in the privatememconversionstest selftest. When memory attributes ar...

CVE-2024-26990

In the Linux kernel, the following vulnerability has been resolved: KVM: x86/mmu: Write-protect L2 SPTEs in TDP MMU when clearing dirty status Check kvmmmupageadneedwriteprotect when deciding whether to write-protect or clear D-bits on TDP MMU SPTEs, so that the TDP MMU accounts for any...

CVE-2024-26990 KVM: x86/mmu: Write-protect L2 SPTEs in TDP MMU when clearing dirty status

In the Linux kernel, the following vulnerability has been resolved: KVM: x86/mmu: Write-protect L2 SPTEs in TDP MMU when clearing dirty status Check kvmmmupageadneedwriteprotect when deciding whether to write-protect or clear D-bits on TDP MMU SPTEs, so that the TDP MMU accounts for any...

CVE-2024-26990

CVE-2024-26990 affects the Linux kernel KVM x86/mmu code. The vulnerability concerns write-protecting L2 SPTEs in the TDP MMU when clearing dirty status. The fix ensures kvm_mmu_page_ad_need_write_protect() accounts for role-specific reasons for disabling D-bit dirty logging, so TDP MMU SPTEs are...

CVE-2024-26990 KVM: x86/mmu: Write-protect L2 SPTEs in TDP MMU when clearing dirty status

In the Linux kernel, the following vulnerability has been resolved: KVM: x86/mmu: Write-protect L2 SPTEs in TDP MMU when clearing dirty status Check kvmmmupageadneedwriteprotect when deciding whether to write-protect or clear D-bits on TDP MMU SPTEs, so that the TDP MMU accounts for any...

CVE-2024-26990 KVM: x86/mmu: Write-protect L2 SPTEs in TDP MMU when clearing dirty status

In the Linux kernel, the following vulnerability has been resolved: KVM: x86/mmu: Write-protect L2 SPTEs in TDP MMU when clearing dirty status Check kvmmmupageadneedwriteprotect when deciding whether to write-protect or clear D-bits on TDP MMU SPTEs, so that the TDP MMU accounts for any...

CVE-2024-26976

CVE-2024-26976 is a Linux kernel KVM vulnerability described in Astra Linux advisory as resolved. It concerns ensuring that the per-vCPU async #PF workqueue is not racing with module unload during VM/vCPU destruction. Root cause: gifting a reference to the VM (kvm_put_kvm) could deadlock because ...

CVE-2024-26976 KVM: Always flush async #PF workqueue when vCPU is being destroyed

In the Linux kernel, the following vulnerability has been resolved: KVM: Always flush async PF workqueue when vCPU is being destroyed Always flush the per-vCPU async PF workqueue when a vCPU is clearing its completion queue, e.g. when a VM and all its vCPUs is being destroyed. KVM must ensure tha...

CVE-2024-26976 KVM: Always flush async #PF workqueue when vCPU is being destroyed

In the Linux kernel, the following vulnerability has been resolved: KVM: Always flush async PF workqueue when vCPU is being destroyed Always flush the per-vCPU async PF workqueue when a vCPU is clearing its completion queue, e.g. when a VM and all its vCPUs is being destroyed. KVM must ensure tha...

CVE-2024-26976 KVM: Always flush async #PF workqueue when vCPU is being destroyed

In the Linux kernel, the following vulnerability has been resolved: KVM: Always flush async PF workqueue when vCPU is being destroyed Always flush the per-vCPU async PF workqueue when a vCPU is clearing its completion queue, e.g. when a VM and all its vCPUs is being destroyed. KVM must ensure tha...

CVE-2024-26976

In the Linux kernel, the following vulnerability has been resolved: KVM: Always flush async PF workqueue when vCPU is being destroyed Always flush the per-vCPU async PF workqueue when a vCPU is clearing its completion queue, e.g. when a VM and all its vCPUs is being destroyed. KVM must ensure tha...

CVE-2024-26957

In the Linux kernel, the following vulnerability has been resolved: s390/zcrypt: fix reference counting on zcrypt card objects Tests with hot-plugging crytpo cards on KVM guests with debug kernel build revealed an use after free for the load field of the struct zcryptcard. The reason was an...

CVE-2024-26957 s390/zcrypt: fix reference counting on zcrypt card objects

In the Linux kernel, the following vulnerability has been resolved: s390/zcrypt: fix reference counting on zcrypt card objects Tests with hot-plugging crytpo cards on KVM guests with debug kernel build revealed an use after free for the load field of the struct zcryptcard. The reason was an...

Moderate: Red Hat Security Advisory: qemu-kvm security update

An update for qemu-kvm is now available for Red Hat Enterprise Linux 9. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerability from t...