CVE-2026-43483

low Red Hat
CVSS v3 Base Score
5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS Score
0.0%
Exploitation probability in 30 days
Top 90% most likely to be exploited
Attack Characteristics
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Confidentiality
None
Integrity
None
Availability
High
Published: May 13, 2026 (58 days ago)
Last Modified: May 13, 2026
Vendor: Red Hat
Source: REDHAT

Description

A flaw was found in the Linux kernel's KVM (Kernel-based Virtual Machine) subsystem, specifically within the SVM (Secure Virtual Machine) module. This vulnerability arises from incorrect handling of CR8 write interceptions when the Advanced Virtual Interrupt Controller (AVIC) is activated or deactivated. This can lead to the CR8 register remaining intercepted, causing the Task Priority Register (TPR) to become out of sync with the hardware. For Windows guest operating systems, this desynchronization can result in system instability or crashes.

CWE

CWE-821

Affected Products

Red Hat Enterprise Linux 10Red Hat Enterprise Linux 6Red Hat Enterprise Linux 7Red Hat Enterprise Linux 8Red Hat Enterprise Linux 9

References

🔗 bugzilla.redhat.com 🔗 www.cve.org 🔗 nvd.nist.gov 🔗 lore.kernel.org