What is RHSA-2021:3802?

RHSA-2021:3802 is a security advisory published by Red Hat Product Security with High severity. Red Hat Security Advisory: kernel-rt security and bug fix update

Which CVE IDs does RHSA-2021:3802 cover?

RHSA-2021:3802 covers the following CVE IDs: CVE-2021-3653, CVE-2021-3656, CVE-2021-22543. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of RHSA-2021:3802?

RHSA-2021:3802 has a CVSS v3 base score of 8.8, published by Red Hat Product Security.

RHSA-2021:3802HighCVSS 8.8

Red Hat Security Advisory: kernel-rt security and bug fix update

Vendor

Red Hat Product Security

Published

October 12, 2021

Last Modified

June 25, 2026

🔗 CVE IDs covered (3)

CVE-2021-3653 →CVE-2021-3656 →CVE-2021-22543 →

📋 Description

CVE-2021-3653 — kernel: SVM nested virtualization issue in KVM (AVIC support) CVE-2021-3656 — kernel: SVM nested virtualization issue in KVM (VMLOAD/VMSAVE) CVE-2021-22543 — kernel: Improper handling of VM_IO|VM_PFNMAP vmas in KVM can bypass RO checks

🔗 References (7)

selfhttps://access.redhat.com/errata/RHSA-2021:3802
externalhttps://access.redhat.com/security/updates/classification/#important
externalhttps://bugzilla.redhat.com/show_bug.cgi?id=1965461
externalhttps://bugzilla.redhat.com/show_bug.cgi?id=1967844
externalhttps://bugzilla.redhat.com/show_bug.cgi?id=1983686
externalhttps://bugzilla.redhat.com/show_bug.cgi?id=1983988
selfhttps://security.access.redhat.com/data/csaf/v2/advisories/2021/rhsa-2021_3802.json