kernel: xen/privcmd: fix double free via VMA splitting

A flaw was found in the Linux kernel's xen/privcmd module. A local user could exploit this by performing a partial unmapping of a privcmd memory region. This action causes a Virtual Memory Area VMA to split, leading to duplicated internal memory pointers. As a result, the same memory can be freed...

RHEL 10 : kernel (RHSA-2026:27288)

The remote Redhat Enterprise Linux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:27288 advisory. The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fixes: kernel: can: isotp: fix tx.buf...

kernel: xen/privcmd: fix double free via VMA splitting

A flaw was found in the Linux kernel's xen/privcmd module. A local user could exploit this by performing a partial unmapping of a privcmd memory region. This action causes a Virtual Memory Area VMA to split, leading to duplicated internal memory pointers. As a result, the same memory can be freed...

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...

Oracle Linux 8 : kernel (ELSA-2026-26427)

The remote Oracle Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2026-26427 advisory. - wifi: mac80211: remove station if connection prep fails Jose Ignacio Tornos Martinez RHEL-180120 CVE-2026-46125 - wifi: mac80211: drop stray 'static...

kernel security update

An update is available for kernel. This update affects Rocky Linux 8. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerability from the CVE list The kernel packages contain the Linux kernel, the core of any Linux operating...

RLSA-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...

ALSA-2026:27288 Important: kernel security, bug fix, and enhancement update

The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fixes: kernel: can: isotp: fix tx.buf use-after-free in isotpsendmsg CVE-2026-31474 kernel: mptcp: fix slab-use-after-free in inetlookupestablished CVE-2026-31669 kernel: rxrpc: Fix RxGK token loading t...

CVE-2026-42490

The Xen hypervisor is vulnerable to a security issue in its domctl operations, which are used to create and manage guests. When XSM/Flask is active, the system-wide lock for certain operations is acquired before permission checks occur. This vulnerability could potentially lead to privilege escal...

CVE-2026-42489 domctl lock open to abuse

This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE. To create and manage guests, domctl operations are used by the control domain, a possible Xenstore domain, or by a domain controlling a particular guest. Some of these...

CVE-2026-42487

The Xen hypervisor is vulnerable to an x86 HVM I/O port list traversal issue (XSA-491 ). The root cause is a lack of synchronization during the traversal of linked lists used for guest I/O port translations, which are managed by the device model via XEN_DOMCTL_ioport_mapping and can change at any...

CVE-2026-42490: Undefined Security Weakness

This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE. To create and manage guests, domctl operations are used by the control domain, a possible Xenstore domain, or by a domain controlling a particular guest. Some of these...

AlmaLinux 8 : kernel (ALSA-2026:26427)

The remote AlmaLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2026:26427 advisory. kernel: mptcp: fix slab-use-after-free in inetlookupestablished CVE-2026-31669 kernel: xen/privcmd: fix double free via VMA splitting CVE-2026-31787...

AlmaLinux 8 : kernel-rt (ALSA-2026:26428)

The remote AlmaLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2026:26428 advisory. kernel: mptcp: fix slab-use-after-free in inetlookupestablished CVE-2026-31669 kernel: xen/privcmd: fix double free via VMA splitting CVE-2026-31787...

CVE-2026-42489: Undefined Security Weakness

This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE. To create and manage guests, domctl operations are used by the control domain, a possible Xenstore domain, or by a domain controlling a particular guest. Some of these...

[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...

Fedora 44 : xen (2026-24b84f97af)

The remote Fedora 44 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-24b84f97af advisory. x86 HVM I/O port list traversal XSA-491, CVE-2026-42487 domctl lock open to abuse XSA-492, CVE-2026-42489, CVE-2026-42490 Arm: Completion of memory...

kernel security update

4.18.0-553.134.1 - Update Oracle Linux certificates Kevin Lyons - Disable signing for aarch64 Ilya Okomin - Oracle Linux RHCK Module Signing Key was added to the kernel trusted keys list olkmodsigningkey.pem Orabug: 29539237 - Update x509.genkey Orabug: 24817676 - Conflict with shim-ia32 and...

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: xen/privcmd: fix double free via VMA splitting

A flaw was found in the Linux kernel's xen/privcmd module. A local user could exploit this by performing a partial unmapping of a privcmd memory region. This action causes a Virtual Memory Area VMA to split, leading to duplicated internal memory pointers. As a result, the same memory can be freed...