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-debuginfo-common-aarch64Upgrade kernel-debuginfoUpgrade perf-debuginfoUpgrade python-perf-debuginfoUpgrade perfUpgrade kernel-tools-develUpgrade kernel-headersUpgrade kernel-toolsUpgrade bpftool-debuginfoUpgrade bpftoolUpgrade python-perfUpgrade kernel-tools-debuginfoUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-develUpgrade kernelUpgrade kernel-livepatch-4.14.348-265.565 | 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 kernelUpgrade kernel-tools-libsUpgrade kernel-abi-stablelistsUpgrade kernel-toolsUpgrade python3-perf | May 13, 2024 | Mar 15, 2024 |
| Huawei Euleros 2_0_sp9 | — | Upgrade kernel-toolsUpgrade kernelUpgrade python3-perfUpgrade kernel-tools-libs | Jul 17, 2024 | Mar 15, 2024 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Mar 15, 2024 |
| Suse | — | Upgrade kernel-symsUpgrade kernel-defaultUpgrade kernel-azureUpgrade kernel-default-develUpgrade kernel-64kb-develUpgrade kernel-develUpgrade kernel-default-baseUpgrade kernel-docsUpgrade kernel-preempt-develUpgrade kernel-64kbUpgrade kernel-azure-baseUpgrade reiserfs-kmp-defaultUpgrade kernel-zfcpdumpUpgrade kernel-obs-buildUpgrade kernel-default-manUpgrade kernel-azure-develUpgrade kernel-sourceUpgrade kernel-syms-azureUpgrade kernel-source-azureUpgrade kernel-macrosUpgrade kernel-devel-azureUpgrade kernel-preemptUpgrade kernel-default-extra | Aug 9, 2024 | Mar 15, 2024 |
| Ubuntu | — | Upgrade linux-gcpUpgrade linux-bluefieldUpgrade linux-raspi-5.4Upgrade linux-awsUpgrade linux-gcp-fipsUpgrade linux-azure-5.4Upgrade linux-hwe-5.4Upgrade linux-gkeopUpgrade linux-gcp-5.4Upgrade linux-raspiUpgrade linux-azureUpgrade linux-aws-fipsUpgrade linux-aws-5.4Upgrade linux-oracle-5.4Upgrade linux-azure-fde-5.15Upgrade linux-oracleUpgrade linux-fipsUpgrade linuxUpgrade linux-kvmUpgrade linux-azure-fips | Nov 19, 2024 | Mar 15, 2024 |
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