CVE-2021-47110
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2021
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
x86/kvm: Disable kvmclock on all CPUs on shutdown
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.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 1e977aa12dd4f80688b1f243762212e75c6d7fe8 | affected | git | 9084fe1b3572664ad276f427dce575f580c9799a | Unavailable | None listed |
| 1e977aa12dd4f80688b1f243762212e75c6d7fe8 | affected | git | 3b0becf8b1ecf642a9edaf4c9628ffc641e490d6 | Unavailable | None listed |
| 1e977aa12dd4f80688b1f243762212e75c6d7fe8 | affected | git | 1df2dc09926f61319116c80ee85701df33577d70 | Unavailable | None listed |
| 1e977aa12dd4f80688b1f243762212e75c6d7fe8 | affected | git | c02027b5742b5aa804ef08a4a9db433295533046 | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 2.6.26 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 2.6.26 | Unavailable | None listed |
| 5.4.125 | unaffected | semver | Unavailable | 5.4.* | None listed |
| 5.10.43 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.12.10 | unaffected | semver | Unavailable | 5.12.* | None listed |
| 5.13 | unaffected | original_commit_for_fix | Unavailable | * | None listed |