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An issue was discovered the x86 KVM subsystem in the Linux kernel before 5.18.17. Unprivileged guest users can compromise the guest kernel because TLB flush operations are mishandled in certain KVM_VCPU_PREEMPTED situations.

🗓️ 09 Sep 2022 07:00:00Reported by MicrosoftType 
mscve
 mscve🔗 msrc.microsoft.com👁 1 Views

Unprivileged guests can compromise the guest kernel due to faulty TLB flush handling in vcpu preempted states on Linux before 5.18.17.

Related
Detection
ReporterTitlePublishedViews
Family
Tenable Nessus		Amazon Linux 2022 : bpftool, kernel, kernel-devel (ALAS2022-2022-150)
14 Oct 202200:00
–nessus
Tenable Nessus		Amazon Linux 2022 : bpftool, kernel, kernel-devel (ALAS2022-2022-185)
5 Nov 202200:00
–nessus
Tenable Nessus		Amazon Linux 2023 : bpftool, kernel, kernel-devel (ALAS2023-2023-070)
21 Mar 202300:00
–nessus
Tenable Nessus		Amazon Linux 2 : kernel, --advisory ALAS2KERNEL-5.15-2022-008 (ALASKERNEL-5.15-2022-008)
14 Oct 202200:00
–nessus
Tenable Nessus		Amazon Linux 2 : kernel, --advisory ALAS2KERNEL-5.4-2023-047 (ALASKERNEL-5.4-2023-047)
29 Jun 202300:00
–nessus
Tenable Nessus		Alibaba Cloud Linux 3 : 0002: cloud-kernel bugfix, enhancement and (ALINUX3-SA-2023:0002)
14 May 202500:00
–nessus
Tenable Nessus		Alibaba Cloud Linux 3 : 0042: cloud-kernel bugfix, enhancement and (ALINUX3-SA-2023:0042)
14 May 202500:00
–nessus
Tenable Nessus		AlmaLinux 9 : kernel-rt (ALSA-2023:2148)
14 May 202300:00
–nessus
Tenable Nessus		AlmaLinux 9 : kernel (ALSA-2023:2458)
14 May 202300:00
–nessus
Tenable Nessus		AlmaLinux 8 : kernel-rt (ALSA-2023:2736)
20 May 202300:00
–nessus
Rows per page
Vulners
Node
microsoftcbl2_kernel_5.15.67.1-4Range<5.15.67.1-4
OR
microsoftcm1_kernel_5.10.181.1-1Range<5.10.181.1-1

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09 Sep 2022 07:00Current
7.1High risk
Vulners AI Score7.1
CVSS 3.17.8
EPSS0.00021
SSVC
unprivileged gueststlb flushvcpu preemptedlinux kernel
1