CVE-2021-46977

CVE-2021-46977 (Linux Kernel KVM VMX) : The vulnerability arises from preemption of the host while probing user return MSRs via RDMSR/WRMSR. If the MSR value differs per logical CPU, a WRMSR could corrupt the host value if KVM is preempted between the RDMSR and WRMSR and rescheduled on another CP...

CVE-2021-46977 KVM: VMX: Disable preemption when probing user return MSRs

In the Linux kernel, the following vulnerability has been resolved: KVM: VMX: Disable preemption when probing user return MSRs Disable preemption when probing a user return MSR via RDSMR/WRMSR. If the MSR holds a different value per logical CPU, the WRMSR could corrupt the host's value if KVM is...

CVE-2021-46977

In the Linux kernel, the following vulnerability has been resolved: KVM: VMX: Disable preemption when probing user return MSRs Disable preemption when probing a user return MSR via RDSMR/WRMSR. If the MSR holds a different value per logical CPU, the WRMSR could corrupt the host's value if KVM is...

PT-2024-10333 · Linux +6 · Linux Kernel +6

Name of the Vulnerable Software and Affected Versions: Linux kernel affected versions not specified Description: The issue is related to an out-of-bounds access when the thread is preempted between two calls to blk mq get ctx. This can cause the program to read garbage if the second context ctx...

Linux kernel security vulnerabilities

Linux kernel is the kernel used by Linux, the open source operating system of the Linux Foundation in the United States. A security vulnerability exists in the Linux kernel that stems from out-of-bounds access during preemption...

kernel: TLB flush operations are mishandled in certain KVM_VCPU_PREEMPTED leading to guest malfunctioning

A flaw was found in the x86 KVM subsystem in kvmstealtimesetpreempted in arch/x86/kvm/x86.c in the Linux kernel. Unprivileged guest users can compromise the guest kernel because TLB flush operations are mishandled in certain KVMVCPUPREEMPTED situations...

kernel: tcp: tcp_make_synack() can be called from process context

In the Linux kernel, the following vulnerability has been resolved: tcp: tcpmakesynack can be called from process context tcprtxsynack now could be called in process context as explained in 0a375c822497 "tcp: tcprtxsynack can be called from process context". tcprtxsynack might call tcpmakesynack,...

PT-2023-9488 · Linux +3 · Linux Kernel +3

Name of the Vulnerable Software and Affected Versions: Linux kernel affected versions not specified Description: The issue is related to the mctp component in the Linux kernel, where route lookups are performed without proper read-side critical section locks, leading to potential preemption and...

kernel: TLB flush operations are mishandled in certain KVM_VCPU_PREEMPTED leading to guest malfunctioning

A flaw was found in the x86 KVM subsystem in kvmstealtimesetpreempted in arch/x86/kvm/x86.c in the Linux kernel. Unprivileged guest users can compromise the guest kernel because TLB flush operations are mishandled in certain KVMVCPUPREEMPTED situations...

kernel: TLB flush operations are mishandled in certain KVM_VCPU_PREEMPTED leading to guest malfunctioning

A flaw was found in the x86 KVM subsystem in kvmstealtimesetpreempted in arch/x86/kvm/x86.c in the Linux kernel. Unprivileged guest users can compromise the guest kernel because TLB flush operations are mishandled in certain KVMVCPUPREEMPTED situations...

kernel: tcp: tcp_rtx_synack() can be called from process context

In the Linux kernel, the following vulnerability has been resolved: tcp: tcprtxsynack can be called from process context Laurent reported the enclosed report 1 This bug triggers with following coditions: 0 Kernel built with CONFIGDEBUGPREEMPT=y 1 A new passive FastOpen TCP socket is created. This...

kernel: octeontx2-pf: Avoid use of GFP_KERNEL in atomic context

In the Linux kernel, the following vulnerability has been resolved: octeontx2-pf: Avoid use of GFPKERNEL in atomic context Using GFPKERNEL in preemption disable context, causing below warning when CONFIGDEBUGATOMICSLEEP is enabled. 32.542271 BUG: sleeping function called from invalid context at...

kernel: TLB flush operations are mishandled in certain KVM_VCPU_PREEMPTED leading to guest malfunctioning

A flaw was found in the x86 KVM subsystem in kvmstealtimesetpreempted in arch/x86/kvm/x86.c in the Linux kernel. Unprivileged guest users can compromise the guest kernel because TLB flush operations are mishandled in certain KVMVCPUPREEMPTED situations...

kernel: TLB flush operations are mishandled in certain KVM_VCPU_PREEMPTED leading to guest malfunctioning

A flaw was found in the x86 KVM subsystem in kvmstealtimesetpreempted in arch/x86/kvm/x86.c in the Linux kernel. Unprivileged guest users can compromise the guest kernel because TLB flush operations are mishandled in certain KVMVCPUPREEMPTED situations...

PT-2025-18831

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to the fixed version Description A vulnerability has been resolved in the Linux kernel. The issue is related to the LoongArch architecture and occurs when the get timer irq function is called multiple times in the...

SUSE CVE-2015-7970

The p2mpodemergencysweep function in arch/x86/mm/p2m-pod.c in Xen 3.4.x, 3.5.x, and 3.6.x is not preemptible, which allows local x86 HVM guest administrators to cause a denial of service CPU consumption and possibly reboot via crafted memory contents that triggers a "time-consuming linear scan,"...

SUSE CVE-2017-18261

The archtimerregreadstable macro in arch/arm64/include/asm/archtimer.h in the Linux kernel before 4.13 allows local users to cause a denial of service infinite recursion by writing to a file under /sys/kernel/debug in certain circumstances, as demonstrated by a scenario involving debugfs, ftrace,...

SUSE CVE-2018-12891

An issue was discovered in Xen through 4.10.x. Certain PV MMU operations may take a long time to process. For that reason Xen explicitly checks for the need to preempt the current vCPU at certain points. A few rarely taken code paths did bypass such checks. By suitably enforcing the conditions...

SUSE CVE-2020-25601

An issue was discovered in Xen through 4.14.x. There is a lack of preemption in evtchnreset / evtchndestroy. In particular, the FIFO event channel model allows guests to have a large number of event channels active at a time. Closing all of these when resetting all event channels or when cleaning...

SUSE CVE-2022-33746

P2M pool freeing may take excessively long The P2M pool backing second level address translation for guests may be of significant size. Therefore its freeing may take more time than is reasonable without intermediate preemption checks. Such checking for the need to preempt was so far missing...