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