Red Hat Security Advisory

RHSA-2021:4000

kpatch-patch security update

Released 2021-10-26 · Red Hat rating Important · View on Red Hat →

Fixed in

Red Hat Enterprise Linux Server E4S (v. 7.7) kpatch-patch-3_10_0-1062_40_1-1-6.el7, kpatch-patch-3_10_0-1062_43_1-1-6.el7, kpatch-patch-3_10_0-1062_45_1-1-6.el7 +5

Fixes 2 records

TI-2021-05506 CVE-2021-22543

Improper memory handling in Linux KVM

LOW 39

An issue was discovered in Linux: KVM through Improper handling of VM_IO|VM_PFNMAP vmas in KVM can bypass RO checks and can lead to pages being freed while still accessible by the VMM and guest.

CVSS 4.0HIGH 8.7 Local Low privileges No interaction EPSS 0.0066 Published 2021-05-26 Partial fix CWE-119

TI-2021-15463 CVE-2021-37576 · GHSA-w5r9-h86g-qp9x

arch/powerpc/kvm/book3s_rtas.c in the Linux kernel through 5.13.5 on the powerpc platform…

LOW 35

arch/powerpc/kvm/book3s_rtas.c in the Linux kernel through 5.13.5 on the powerpc platform allows KVM guest OS users to cause host OS memory corruption via rtas_args.nargs, aka CID-f62f3c20647e.

CVSS 3.1HIGH 7.8 Local Low privileges No interaction EPSS 0.00575 Published 2021-07-26 Partial fix CWE-787