CVE - CVE-2021-47255

CVE-ID
CVE-2021-47255	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
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 kvm_lapic_reg_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
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/018685461a5b9a9a70e664ac77aef0d7415a3fd5 URL:https://git.kernel.org/stable/c/018685461a5b9a9a70e664ac77aef0d7415a3fd5 MISC:https://git.kernel.org/stable/c/218bf772bddd221489c38dde6ef8e917131161f6 URL:https://git.kernel.org/stable/c/218bf772bddd221489c38dde6ef8e917131161f6 MISC:https://git.kernel.org/stable/c/a2aff09807fbe4018c269d3773a629949058b210 URL:https://git.kernel.org/stable/c/a2aff09807fbe4018c269d3773a629949058b210 MISC:https://git.kernel.org/stable/c/bf99ea52970caeb4583bdba1192c1f9b53b12c84 URL:https://git.kernel.org/stable/c/bf99ea52970caeb4583bdba1192c1f9b53b12c84
Assigning CNA
kernel.org
Date Record Created
20240410	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20240410)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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