RHSA-2021:3987HighCVSS 8.8

Red Hat Security Advisory: kernel security and bug fix update

Published
October 26, 2021
Last Modified
June 25, 2026

🔗 CVE IDs covered (6)

CVE-2019-20934 →CVE-2020-36385 →CVE-2021-3653 →CVE-2021-3656 →CVE-2021-22543 →CVE-2021-37576 →

📋 Description

CVE-2019-20934 — kernel: use-after-free in show_numa_stats function CVE-2020-36385 — kernel: use-after-free in drivers/infiniband/core/ucma.c ctx use-after-free 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 CVE-2021-37576 — kernel: powerpc: KVM guest OS users can cause host OS memory corruption

🔗 References (9)