In the Linux kernel, the following vulnerability has been resolved:
x86/kvm: Disable kvmclock on all CPUs on shutdown
Currenly, we disable kvmclock from machine_shutdown() hook and this only happens for boot CPU. We need to disable it for all CPUs to guard against memory corruption e.g. on restore from hibernate.
Note, writing '0' to kvmclock MSR doesn't clear memory location, it just prevents hypervisor from updating the location so for the short while after write and while CPU is still alive, the clock remains usable and correct so we don't need to switch to some other clocksource.
CVSS Details
- CVSS 3.1 Base Score: 7.1
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade kernel-livepatch-4.14.348-265.565Upgrade kernel-develUpgrade kernel-toolsUpgrade python-perfUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-tools-debuginfoUpgrade bpftoolUpgrade bpftool-debuginfoUpgrade kernelUpgrade kernel-tools-develUpgrade perfUpgrade kernel-debuginfoUpgrade kernel-headersUpgrade kernel-debuginfo-common-aarch64Upgrade perf-debuginfoUpgrade python-perf-debuginfo | May 28, 2024 | Mar 15, 2024 |
| Amazon_linux | — | Upgrade kernel | Jun 24, 2024 | Mar 15, 2024 |
| Debian | — | Upgrade linux | Jul 30, 2024 | Mar 15, 2024 |
| Huawei Euleros 2_0_sp10 | — | Upgrade python3-perfUpgrade kernel-toolsUpgrade kernelUpgrade kernel-tools-libsUpgrade kernel-abi-stablelists | May 13, 2024 | Mar 15, 2024 |
| Huawei Euleros 2_0_sp9 | — | Upgrade python3-perfUpgrade kernel-tools-libsUpgrade kernelUpgrade kernel-tools | Jul 17, 2024 | Mar 15, 2024 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Mar 15, 2024 |
| Suse | — | Upgrade kernel-preempt-develUpgrade kernel-64kbUpgrade kernel-symsUpgrade kernel-docsUpgrade kernel-azureUpgrade kernel-azure-baseUpgrade kernel-defaultUpgrade kernel-default-develUpgrade kernel-develUpgrade kernel-default-baseUpgrade reiserfs-kmp-defaultUpgrade kernel-64kb-develUpgrade kernel-preemptUpgrade kernel-source-azureUpgrade kernel-azure-develUpgrade kernel-obs-buildUpgrade kernel-default-extraUpgrade kernel-zfcpdumpUpgrade kernel-macrosUpgrade kernel-devel-azureUpgrade kernel-default-manUpgrade kernel-sourceUpgrade kernel-syms-azure | Aug 9, 2024 | Mar 15, 2024 |
| Ubuntu | — | Upgrade linux-azure-5.4Upgrade linux-awsUpgrade linux-gcpUpgrade linux-bluefieldUpgrade linux-gcp-fipsUpgrade linux-raspi-5.4Upgrade linux-fipsUpgrade linux-aws-fipsUpgrade linux-azure-fde-5.15Upgrade linux-oracle-5.4Upgrade linux-aws-5.4Upgrade linux-gcp-5.4Upgrade linux-azureUpgrade linux-gkeopUpgrade linux-kvmUpgrade linux-azure-fipsUpgrade linuxUpgrade linux-raspiUpgrade linux-hwe-5.4Upgrade linux-oracle | Nov 19, 2024 | Mar 15, 2024 |
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