PT-2024-11162 · Linux+2 · Linux Kernel+2
Vitaly Kuznetsov
·
Published
2021-05-07
·
Updated
2026-03-27
·
CVE-2021-47110
CVSS v3.1
7.1
High
| Vector | AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel (affected versions not specified)
Description
The issue is related to the Linux kernel, where the
kvmclock is not properly disabled on all CPUs during shutdown, which can lead to memory corruption when restoring from hibernate. Currently, kvmclock is disabled from the machine shutdown() hook, but this only happens for the boot CPU. To prevent memory corruption, it is necessary to disable kvmclock on all CPUs. Writing '0' to kvmclock MSR does not clear the memory location but prevents the hypervisor from updating it, allowing the clock to remain usable for a short period.Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
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Weakness Enumeration
Related Identifiers
Affected Products
Astra Linux
Linux Kernel
Suse