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 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-2024-26990

In CVE-2024-26990, the Linux kernel KVM x86/mmu vulnerability concerns write-protection of L2 SPTEs in the TDP MMU when clearing dirty status. The fix ensures that TDP MMU SPTEs are write-protected when using the L2 page table level with EPT disabled on L1 and PML enabled; since KVM disables PML ...

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 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 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

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

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...

kernel: KVM: s390: fix setting of fpc register

In the Linux kernel, the following vulnerability has been resolved: KVM: s390: fix setting of fpc register kvmarchvcpuioctlsetfpu allows to set the floating point control fpc register of a guest cpu. The new value is tested for validity by temporarily loading it into the fpc register. This may le...

RHEL 9 : qemu-kvm (RHSA-2024:2135)

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2024:2135 advisory. Kernel-based Virtual Machine KVM is a full virtualization solution for Linux on a variety of architectures. The qemu-kvm packages provide th...