CVE-2021-47341
kernel: KVM: mmio: Fix use-after-free Read in kvm_vm_ioctl_unregister_coalesced_mmio
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · May 21, 2024
Updated · August 5, 2026
Description
A vulnerability was found in the Linux kernel’s KVM subsystem in the kvm_vm_ioctl_unregister_coalesced_mmio function, where an uninitialized memory value could be accessed if a certain operation failed. This could lead to unpredictable behavior or system crashes due to the use of freed memory.
Statement
This vulnerability is rated as a moderate severity because it can cause system crashes or instability by accessing invalid memory.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-416 · Use After Free