CVE-2026-23553

In the context switch logic Xen attempts to skip an IBPB in the case of a vCPU returning to a CPU on which it was the previous vCPU to run. While safe for Xen's isolation between vCPUs, this prevents the guest kernel correctly isolating between tasks. Consider: 1 vCPU runs on CPU A, running task ...

CVE-2026-23553

CVE-2026-23553 is an issue in the Xen hypervisor: during context switches, Xen may skip IBPB when a vCPU returns to the same physical CPU, potentially allowing stale BTB/GPU state to persist across tasks and undermine guest kernel isolation. The advisory chain shows the vulnerability is tied to i...

CVE-2026-23553

In the context switch logic Xen attempts to skip an IBPB in the case of a vCPU returning to a CPU on which it was the previous vCPU to run. While safe for Xen's isolation between vCPUs, this prevents the guest kernel correctly isolating between tasks. Consider: 1 vCPU runs on CPU A, running task ...

CVE-2025-58150 x86: buffer overrun with shadow paging + tracing

Shadow mode tracing code uses a set of per-CPU variables to avoid cumbersome parameter passing. Some of these variables are written to with guest controlled data, of guest controllable size. That size can be larger than the variable, and bounding of the writes was missing...

CVE-2025-58150

CVE-2025-58150 affects the Xen hypervisor (shadow mode tracing code) where per-CPU variables are written with guest-controlled data. The writes can exceed the destination variable, and bounding is missing, enabling memory corruption. Public advisories (XSA-477) and multiple distro updates (Fedora...

CVE-2025-58150

Shadow mode tracing code uses a set of per-CPU variables to avoid cumbersome parameter passing. Some of these variables are written to with guest controlled data, of guest controllable size. That size can be larger than the variable, and bounding of the writes was missing...

CVE-2025-58150 x86: buffer overrun with shadow paging + tracing

Shadow mode tracing code uses a set of per-CPU variables to avoid cumbersome parameter passing. Some of these variables are written to with guest controlled data, of guest controllable size. That size can be larger than the variable, and bounding of the writes was missing...

urllib3: urllib3 Streaming API improperly handles highly compressed data

A decompression handling flaw has been discovered in urllib3. When streaming a compressed response, urllib3 can perform decoding or decompression based on the HTTP Content-Encoding header e.g., gzip, deflate, br, or zstd. The library must read compressed data from the network and decompress it...

kernel: KVM: arm64: Tear down vGIC on failed vCPU creation

A use-after-free flaw was found in KVM for arm64 in the Linux Kernel, if the kvmarchvcpucreate fails to share the vCPU page with the hypervisor. This vulnerability could even lead to a kernel information leak problem...

CVE-2026-23553

In the context switch logic Xen attempts to skip an IBPB in the case of a vCPU returning to a CPU on which it was the previous vCPU to run. While safe for Xen's isolation between vCPUs, this prevents the guest kernel correctly isolating between tasks. Consider: 1 vCPU runs on CPU A, running task ...

Xen security vulnerabilities

Xen is an open-source virtual machine monitor product developed by Xen. This product allows different and incompatible operating systems to run on the same computer. It also supports migration during runtime, ensuring smooth operation and avoiding downtime. Xen has security vulnerabilities; these...

CVE-2026-24738

gmrtd is a Go library for reading Machine Readable Travel Documents MRTDs. Prior to version 0.17.2, ReadFile accepts TLVs with lengths that can range up to 4GB, which can cause unconstrained resource consumption in both memory and cpu cycles. ReadFile can consume an extended TLV with lengths well...

CVE-2026-24738

Concisely, the Go library github.com/gmrtd/gmrtd’s ReadFile() is vulnerable to Denial of Service from unbounded TLV lengths before v0.17.2. Multiple sources (SUSE, Red Hat, OSV, CVE lists, GHSA advisory, Snyk) describe that ReadFile could accept TLVs up to 4 GB, causing uncontrolled memory and CP...

CVE-2026-24738 gmrtd ReadFile Vulnerable to Denial of Service via Excessive TLV Length Values

gmrtd is a Go library for reading Machine Readable Travel Documents MRTDs. Prior to version 0.17.2, ReadFile accepts TLVs with lengths that can range up to 4GB, which can cause unconstrained resource consumption in both memory and cpu cycles. ReadFile can consume an extended TLV with lengths well...

CVE-2026-24738 gmrtd ReadFile Vulnerable to Denial of Service via Excessive TLV Length Values

gmrtd is a Go library for reading Machine Readable Travel Documents MRTDs. Prior to version 0.17.2, ReadFile accepts TLVs with lengths that can range up to 4GB, which can cause unconstrained resource consumption in both memory and cpu cycles. ReadFile can consume an extended TLV with lengths well...

CVE-2025-65264

The kernel driver of CPUID CPU-Z v2.17 and earlier does not validate user-supplied values passed via its IOCTL interface, allowing an attacker to access sensitive information via a crafted request...

CVE-2025-65264

The kernel driver of CPUID CPU-Z v2.17 and earlier does not validate user-supplied values passed via its IOCTL interface, allowing an attacker to access sensitive information via a crafted request...

SUSE-SU-2026:0306-1 Security update for xen

This update for xen fixes the following issues: - CVE-2025-58150: Fixed buffer overrun with shadow paging and tracing XSA-477 bsc1256745 - CVE-2026-23553: Fixed incomplete IBPB for vCPU isolation XSA-479 bsc1256747...

Security update for xen

This update for xen fixes the following issues: Security fixes: CVE-2025-58150: Fixed buffer overrun with shadow paging and tracing XSA-477 bsc1256745 CVE-2026-23553: Fixed incomplete IBPB for vCPU isolation XSA-479 bsc1256747 CVE-2025-58149: Fixed incorrect removal od permissions on PCI device...

x86: incomplete IBPB for vCPU isolation

ISSUE DESCRIPTION In the context switch logic Xen attempts to skip an IBPB in the case of a vCPU returning to a CPU on which it was the previous vCPU to run. While safe for Xen's isolation between vCPUs, this prevents the guest kernel correctly isolating between tasks. Consider: 1 vCPU runs on CP...