CVE-2021-47255
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2021-47255
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-47255.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2021-47255
- Related
- Published
- 2024-05-21T15:15:14Z
- Modified
- 2024-09-11T02:00:05Z
- Summary
- [none]
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
kvm: LAPIC: Restore guard to prevent illegal APIC register access
Per the SDM, "any access that touches bytes 4 through 15 of an APIC register may cause undefined behavior and must not be executed." Worse, such an access in kvmlapicreg_read can result in a leak of kernel stack contents. Prior to commit 01402cf81051 ("kvm: LAPIC: write down valid APIC registers"), such an access was explicitly disallowed. Restore the guard that was removed in that commit.
- References
-
- https://git.kernel.org/stable/c/018685461a5b9a9a70e664ac77aef0d7415a3fd5
- https://git.kernel.org/stable/c/218bf772bddd221489c38dde6ef8e917131161f6
- https://git.kernel.org/stable/c/a2aff09807fbe4018c269d3773a629949058b210
- https://git.kernel.org/stable/c/bf99ea52970caeb4583bdba1192c1f9b53b12c84
- https://security-tracker.debian.org/tracker/CVE-2021-47255
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