CVE-2021-47112
See a problem?- Source
- https://nvd.nist.gov/vuln/detail/CVE-2021-47112
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-47112.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2021-47112
- Related
- Published
- 2024-03-15T21:15:06Z
- Modified
- 2024-09-18T01:00:22Z
- Summary
- [none]
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
x86/kvm: Teardown PV features on boot CPU as well
Various PV features (Async PF, PV EOI, steal time) work through memory shared with hypervisor and when we restore from hibernation we must properly teardown all these features to make sure hypervisor doesn't write to stale locations after we jump to the previously hibernated kernel (which can try to place anything there). For secondary CPUs the job is already done by kvmcpudown_prepare(), register syscore ops to do the same for boot CPU.
- References
-
- https://git.kernel.org/stable/c/38b858da1c58ad46519a257764e059e663b59ff2
- https://git.kernel.org/stable/c/7620a669111b52f224d006dea9e1e688e2d62c54
- https://git.kernel.org/stable/c/8b79feffeca28c5459458fe78676b081e87c93a4
- https://git.kernel.org/stable/c/d1629b5b925de9b27979e929dae7fcb766daf6b6
- https://security-tracker.debian.org/tracker/CVE-2021-47112
Affected packages
Debian:11 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source
Debian:12 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source
Debian:13 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source