CVE-2026-0665

An off-by-one error was found in QEMU's KVM Xen guest support. A malicious guest could use this flaw to trigger out-of-bounds heap accesses in the QEMU process via the emulated Xen physdev hypercall interface, leading to a denial of service or potential memory corruption...

CVE-2025-8860 Qemu-kvm: uefi-vars: information disclosure vulnerability in uefi_vars_write callback

A flaw was found in QEMU in the uefi-vars virtual device. When the guest writes to register UEFIVARSREGBUFFERSIZE, the .write callback uefivarswrite is invoked. The function allocates a heap buffer without zeroing the memory, leaving the buffer filled with residual data from prior allocations. Wh...

CVE-2025-8860

CVE-2025-8860 affects QEMU by a flaw in the uefi-vars device: after writing to UEFI_VARS_REG_BUFFER_SIZE, a heap buffer is allocated without zeroing, leaving residual data that can be read later from UEFI_VARS_REG_PIO_BUFFER_TRANSFER, causing information disclosure. Oracle Linux advisories ELSA-2...

CVE-2025-8860 Qemu-kvm: uefi-vars: information disclosure vulnerability in uefi_vars_write callback

A flaw was found in QEMU in the uefi-vars virtual device. When the guest writes to register UEFIVARSREGBUFFERSIZE, the .write callback uefivarswrite is invoked. The function allocates a heap buffer without zeroing the memory, leaving the buffer filled with residual data from prior allocations. Wh...

CVE-2025-8860 Qemu-kvm: uefi-vars: information disclosure vulnerability in uefi_vars_write callback

A flaw was found in QEMU in the uefi-vars virtual device. When the guest writes to register UEFIVARSREGBUFFERSIZE, the .write callback uefivarswrite is invoked. The function allocates a heap buffer without zeroing the memory, leaving the buffer filled with residual data from prior allocations. Wh...

CVE-2025-14876 Qemu-kvm: unbounded allocation in virtio-crypto

A flaw was found in the virtio-crypto device of QEMU. A malicious guest operating system can exploit a missing length limit in the AKCIPHER path, leading to uncontrolled memory allocation. This can result in a denial of service DoS on the host system by causing the QEMU process to terminate...

CVE-2025-14876

CVE-2025-14876 affects the virtio-crypto device in QEMU. The AKCIPHER path has a missing length limit, causing unbounded memory allocation and potential host DoS (QEMU process termination) via a malicious guest. Affected products include qemu/kvm; advisories from SUSE openSUSE and other vendors r...

OpenStack Nova calls qemu-img without format restrictions for resize

An issue was discovered in OpenStack Nova before 30.2.2, 31 before 31.2.1, and 32 before 32.1.1. By writing a malicious QCOW header to a root or ephemeral disk and then triggering a resize, a user may convince Nova's Flat image backend to call qemu-img without a format restriction, resulting in a...

GHSA-M4F3-QP2W-GWH6 OpenStack Nova calls qemu-img without format restrictions for resize

An issue was discovered in OpenStack Nova before 30.2.2, 31 before 31.2.1, and 32 before 32.1.1. By writing a malicious QCOW header to a root or ephemeral disk and then triggering a resize, a user may convince Nova's Flat image backend to call qemu-img without a format restriction, resulting in a...

UBUNTU-CVE-2026-23215

In the Linux kernel, the following vulnerability has been resolved: x86/vmware: Fix hypercall clobbers Fedora QA reported the following panic: BUG: unable to handle page fault for address: 0000000040003e54 PF: supervisor write access in kernel mode PF: errorcode0x0002 - not-present page Hardware...

CVE-2026-23215

In the Linux kernel, the following vulnerability has been resolved: x86/vmware: Fix hypercall clobbers Fedora QA reported the following panic: BUG: unable to handle page fault for address: 0000000040003e54 PF: supervisor write access in kernel mode PF: errorcode0x0002 - not-present page Hardware...

CVE-2026-23215 x86/vmware: Fix hypercall clobbers

In the Linux kernel, the following vulnerability has been resolved: x86/vmware: Fix hypercall clobbers Fedora QA reported the following panic: BUG: unable to handle page fault for address: 0000000040003e54 PF: supervisor write access in kernel mode PF: errorcode0x0002 - not-present page Hardware...

CVE-2026-23215

CVE-2026-23215 affects the Linux kernel’s x86/vmware code. The issue arises from buggy QEMU VMware mouse emulation that clobbers the top 32 bits of the RDI/RSI state across hypercalls, causing page faults when dereferencing a saved kernel stack address. The kernel workaround marks RDI/RSI as clob...

CVE-2026-23215 x86/vmware: Fix hypercall clobbers

In the Linux kernel, the following vulnerability has been resolved: x86/vmware: Fix hypercall clobbers Fedora QA reported the following panic: BUG: unable to handle page fault for address: 0000000040003e54 PF: supervisor write access in kernel mode PF: errorcode0x0002 - not-present page Hardware...

CVE-2026-23215

In the Linux kernel, the following vulnerability has been resolved: x86/vmware: Fix hypercall clobbers Fedora QA reported the following panic: BUG: unable to handle page fault for address: 0000000040003e54 PF: supervisor write access in kernel mode PF: errorcode0x0002 - not-present page Hardware...

CVE-2026-24708

A flaw in OpenStack Nova’s interaction with the qemu-img utility allows an authenticated user to overwrite arbitrary files on the compute host. This occurs because Nova invokes qemu-img without strictly constraining the disk image format, enabling a malicious user to craft a QCOW2 header on a raw...

CVE-2026-24708

An issue was discovered in OpenStack Nova before 30.2.2, 31 before 31.2.1, and 32 before 32.1.1. By writing a malicious QCOW header to a root or ephemeral disk and then triggering a resize, a user may convince Nova's Flat image backend to call qemu-img without a format restriction, resulting in a...

CVE-2026-24708

CVE-2026-24708 affects OpenStack Nova (Flat image backend), where an attacker could cause unsafe image resize by writing a malicious QCOW header to a root or ephemeral disk, triggering qemu-img without a format restriction. Affected: Nova releases before 30.2.2, 31 before 31.2.1, and 32 before 32...

QEMU 安全漏洞

QEMU Quick Emulator is a simulation software for processors developed by Fabrice Bellard from France. This software features high speed and cross-platform capabilities. QEMU has a security vulnerability, which stems from a minor error in the KVM Xen client support. This error may lead to...

External Control of File Name or Path

Overview nova is an OpenStack Nova provides a cloud computing fabric controller, supporting a wide variety of compute technologies, including: libvirt KVM, Xen, LXC and more, Hyper-V, VMware, XenServer, OpenStack Ironic and PowerVM. Affected versions of this package are vulnerable to External...