[SECURITY] Fedora 44 Update: xen-4.21.2-1.fc44

This package contains the XenD daemon and xm command line tools, needed to manage virtual machines running under the Xen hypervisor...

ALPINE-CVE-2026-62428

When grant-copy operations are processed, the respective grant may or may not already be in use by another operation a mapping or another copy. For all copy operations the referenced guest frame is looked up. When another operation is already active for the grant the grant is "pinned", what is...

CVE-2026-62430

Accesses to the CMOS memory contents are done using an indirect IO port pair. Therefore Xen needs to cache the guest chosen index, and one of the usages of the index didn't take the necessary locking to avoid concurrent changes. As a result, a guest could change the index after it being checked,...

CVE-2026-62430 x86: Out-of-bounds read in vRTC emulation

Accesses to the CMOS memory contents are done using an indirect IO port pair. Therefore Xen needs to cache the guest chosen index, and one of the usages of the index didn't take the necessary locking to avoid concurrent changes. As a result, a guest could change the index after it being checked,...

evtchn: Race between FIFO expand and reset

ISSUE DESCRIPTION The EVTCHNOPexpandarray hypercall checks for whether FIFO event channels are enabled, but without holding the correct lock. It can race with EVTCHNOPreset, resulting in dereferencing a NULL pointer. IMPACT A malicious HVM guest x86 HVM or PVH, and ARM can crash Xen leading to a...

USN-8604-1 linux-azure-6.17 vulnerabilities

Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems: - Foo-over-UDP FOU; - ARM64 architecture; - x86 architecture; - Block layer subsystem; - Cryptographic API; - Drivers...

USN-8604-1: Linux kernel (Azure) vulnerabilities

Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems: - Foo-over-UDP FOU; - ARM64 architecture; - x86 architecture; - Block layer subsystem; - Cryptographic API; - Drivers...

EulerOS Virtualization 2.10.0 : kernel (EulerOS-SA-2026-2854)

According to the versions of the kernel packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities : mrp: introduce active flags to prevent UAF when applicant uninitCVE-2022-50697 net: skbuff: propagate shared-frag marker through...

CVE-2026-23560

A flaw was found in Xen. A virtual machine administrator vm-admin can exploit this by setting the VM.other-config:issystemdomain parameter, which allows them to mark a virtual machine as a system domain. This can lead to the virtual machine being ignored and remaining operational during critical...

CVE-2026-23560

This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE. XAPI can configure different users with different roles, using Role Based Access Control. For more details, see:...

kernel: Buffer overflow in drivers/xen/sys-hypervisor.c

A flaw was found in the Linux kernel. A buffer overflow vulnerability exists in the Xen hypervisor driver drivers/xen/sys-hypervisor.c. This flaw occurs because the HYPERVISORxenversionXENVERbuildid function returns a build ID that is not properly null-terminated. When the buildidshow function...

[SECURITY] Fedora 44 Update: xen-4.21.1-4.fc44

This package contains the XenD daemon and xm command line tools, needed to manage virtual machines running under the Xen hypervisor...

kernel: Buffer overflow in drivers/xen/sys-hypervisor.c

A flaw was found in the Linux kernel. A buffer overflow vulnerability exists in the Xen hypervisor driver drivers/xen/sys-hypervisor.c. This flaw occurs because the HYPERVISORxenversionXENVERbuildid function returns a build ID that is not properly null-terminated. When the buildidshow function...

kernel: Buffer overflow in drivers/xen/sys-hypervisor.c

A flaw was found in the Linux kernel. A buffer overflow vulnerability exists in the Xen hypervisor driver drivers/xen/sys-hypervisor.c. This flaw occurs because the HYPERVISORxenversionXENVERbuildid function returns a build ID that is not properly null-terminated. When the buildidshow function...

Important: kernel-rt security update

The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. Security Fixes: kernel: mptcp: fix slab-use-after-free in inetlookupestablished CVE-2026-31669 kernel: xen/privcmd: fix double free via VMA splitting...

ALSA-2026:26428 Important: kernel-rt security update

The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. Security Fixes: kernel: mptcp: fix slab-use-after-free in inetlookupestablished CVE-2026-31669 kernel: xen/privcmd: fix double free via VMA splitting...

ALSA-2026:26427 Important: kernel security update

The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fixes: kernel: mptcp: fix slab-use-after-free in inetlookupestablished CVE-2026-31669 kernel: xen/privcmd: fix double free via VMA splitting CVE-2026-31787 kernel: Buffer overflow in...

Xen: x86 Mismatched Mapcache Metadata (XSA-494)

Some shadow paging errors paths will switch the page-tables without updating the currently running vCPU reference. This causes a mismatch between the loaded page-tables and the mapcache metadata which can lead to corruption of the mapcache. This can result in privilege escalation, Denial of Servi...

Xen: x86 HVM I/O Port List Traversal (XSA-491)

HVM guest I/O port accesses are subject to either emulation or at least translation. Translations are managed by the device model via XENDOMCTLioportmapping, and hence the linked list used may changed at any time. Traversal of those lists while handling guest I/O port accesses therefore needs...

kernel: Buffer overflow in drivers/xen/sys-hypervisor.c

A flaw was found in the Linux kernel. A buffer overflow vulnerability exists in the Xen hypervisor driver drivers/xen/sys-hypervisor.c. This flaw occurs because the HYPERVISORxenversionXENVERbuildid function returns a build ID that is not properly null-terminated. When the buildidshow function...