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