CVE-2026-64561 KVM: x86: Check for invalid/obsolete root *after* making MMU pages available

In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Check for invalid/obsolete root after making MMU pages available Check for a "stale" page fault, i.e. for an invalid and/or obsolete root, after making MMU pages available for the shadow MMU. If reclaiming shadow pages...

CVE-2026-64562

CVE-2026-64562 affects the Linux kernel KVM nVMX feature. The issue arises when freeing the shadow VMCS: free_nested() frees the shadow VMCS while vmcs01 still points to it, which is asynchronous with respect to loaded_vmcs_clear(). As a result, a vCPU may migrate before the pointer is cleared, a...

CVE-2026-64562

In the Linux kernel, the following vulnerability has been resolved: KVM: nVMX: Hide shadow VMCS right after VMCLEAR freenested frees the shadow VMCS while vmcs01 still points to it. But because it is asynchronous with respect to loadedvmcsclear, the vCPU might migrate before the pointer is cleare...

kernel: Linux kernel: Denial of Service due to NULL function pointer race in timer shutdown

A flaw was found in the Linux kernel. A race condition exists in the timershutdownsync function, where a timer's function pointer can be set to NULL while the timer is still active on another processor. This can be exploited by a local attacker to trigger a kernel warning, potentially leading to...

Low: Red Hat Security Advisory: kernel security, bug fix, and enhancement update

An update for kernel is now available for Red Hat Enterprise Linux 9. Red Hat Product Security has rated this update as having a security impact of Low. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerability from the CVE...

Moderate: Red Hat Security Advisory: kernel security, bug fix, and enhancement update

An update for kernel is now available for Red Hat Enterprise Linux 10. 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 th...

kernel: Linux kernel: Denial of Service due to NULL function pointer race in timer shutdown

A flaw was found in the Linux kernel. A race condition exists in the timershutdownsync function, where a timer's function pointer can be set to NULL while the timer is still active on another processor. This can be exploited by a local attacker to trigger a kernel warning, potentially leading to...

kernel: ipc: limit next_id allocation to the valid ID range

A flaw was found in the Linux kernel. The ipcidralloc function, used in the checkpoint/restore path for SysV Inter-Process Communication IPC ID allocation, does not properly limit ID allocation to the valid range. This can result in the system attempting to dereference freed memory, leading to a...

Moderate: Red Hat Security Advisory: kernel security, bug fix, and enhancement update

An update for kernel is now available for Red Hat Enterprise Linux 8. 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 the...

kernel: ipc: limit next_id allocation to the valid ID range

A flaw was found in the Linux kernel. The ipcidralloc function, used in the checkpoint/restore path for SysV Inter-Process Communication IPC ID allocation, does not properly limit ID allocation to the valid range. This can result in the system attempting to dereference freed memory, leading to a...

Moderate: Red Hat Security Advisory: kernel-rt security, bug fix, and enhancement update

An update for kernel-rt is now available for Red Hat Enterprise Linux 8. 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...

Linux Distros Unpatched Vulnerability : CVE-2026-64564

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - sctp: don't free the ASCONF's own transport in DEL-IP processing sctpprocessasconf caches the transport the ASCONF chunk is processed against in asconf-transpor...

Linux Distros Unpatched Vulnerability : CVE-2026-64561

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - KVM: x86: Check for invalid/obsolete root after making MMU pages available Check for a stale page fault, i.e. for an invalid and/or obsolete root, after making...

Moderate: kernel security, bug fix, and enhancement update

The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fixes: kernel: ipc: limit nextid allocation to the valid ID range CVE-2026-52923 Bug Fixes and Enhancements: AlmaLinux8.10 - KVM: s390: Limit adapter indicator access to mapped page JIRA:AlmaLinux-18388...

ALSA-2026:49857 Moderate: kernel security, bug fix, and enhancement update

The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fixes: kernel: ipc: limit nextid allocation to the valid ID range CVE-2026-52923 Bug Fixes and Enhancements: AlmaLinux8.10 - KVM: s390: Limit adapter indicator access to mapped page JIRA:AlmaLinux-18388...

Moderate: kernel-rt security, bug fix, and enhancement 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: ipc: limit nextid allocation to the valid ID range CVE-2026-52923 Bug Fixes and Enhancements: AlmaLinux8.10 - KVM: s390: Limit...

ALSA-2026:49851 Moderate: kernel-rt security, bug fix, and enhancement 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: ipc: limit nextid allocation to the valid ID range CVE-2026-52923 Bug Fixes and Enhancements: AlmaLinux8.10 - KVM: s390: Limit...

Linux Distros Unpatched Vulnerability : CVE-2026-64565

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Input: ims-pcu - fix heap-buffer-overflow in imspcuprocessdata The imspcuprocessdata processes incoming URB data byte by byte. However, it fails to check if the...

Oracle Linux 7 / 8 : Unbreakable Enterprise kernel (ELSA-2026-500121)

The remote Oracle Linux 7 / 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2026-500121 advisory. - xfs: resample the data fork mapping after cycling ILOCK Darrick J. Wong Orabug: 39776792 CVE-2026-64600 - net/sched: fix pedit partial COW...

RHEL 10 : kernel (RHSA-2026:49871)

The remote Redhat Enterprise Linux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:49871 advisory. The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fixes: kernel: Linux kernel: Denial of...