A kpatch-patch security update has been released for Red Hat Enterprise Linux 8.
RHSA-2021:3044-01: Important: kpatch-patch security update
=====================================================================
Red Hat Security Advisory
Synopsis: Important: kpatch-patch security update
Advisory ID: RHSA-2021:3044-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:3044
Issue date: 2021-08-10
CVE Names: CVE-2021-3609 CVE-2021-22543 CVE-2021-22555
=====================================================================
1. Summary:
An update for kpatch-patch is now available for Red Hat Enterprise Linux 8.
Red Hat Product Security has rated this update as having a security impact
of Important. A Common Vulnerability Scoring System (CVSS) base score,
which gives a detailed severity rating, is available for each vulnerability
from the CVE link(s) in the References section.
2. Relevant releases/architectures:
Red Hat Enterprise Linux BaseOS (v. 8) - ppc64le, x86_64
3. Description:
This is a kernel live patch module which is automatically loaded by the RPM
post-install script to modify the code of a running kernel.
Security Fix(es):
* kernel: race condition in net/can/bcm.c leads to local privilege
escalation (CVE-2021-3609)
* kernel: Improper handling of VM_IO|VM_PFNMAP vmas in KVM can bypass RO
checks (CVE-2021-22543)
* kernel: out-of-bounds write in xt_compat_target_from_user() in
net/netfilter/x_tables.c (CVE-2021-22555)
For more details about the security issue(s), including the impact, a CVSS
score, acknowledgments, and other related information, refer to the CVE
page(s) listed in the References section.
4. Solution:
For details on how to apply this update, which includes the changes
described in this advisory, refer to:
https://access.redhat.com/articles/11258
5. Bugs fixed ( https://bugzilla.redhat.com/):
1965461 - CVE-2021-22543 kernel: Improper handling of VM_IO|VM_PFNMAP vmas in KVM can bypass RO checks
1971651 - CVE-2021-3609 kernel: race condition in net/can/bcm.c leads to local privilege escalation
1980101 - CVE-2021-22555 kernel: out-of-bounds write in xt_compat_target_from_user() in net/netfilter/x_tables.c
6. Package List:
Red Hat Enterprise Linux BaseOS (v. 8):
Source:
kpatch-patch-4_18_0-305-1-4.el8.src.rpm
kpatch-patch-4_18_0-305_10_2-1-1.el8_4.src.rpm
kpatch-patch-4_18_0-305_3_1-1-3.el8_4.src.rpm
kpatch-patch-4_18_0-305_7_1-1-2.el8_4.src.rpm
ppc64le:
kpatch-patch-4_18_0-305-1-4.el8.ppc64le.rpm
kpatch-patch-4_18_0-305-debuginfo-1-4.el8.ppc64le.rpm
kpatch-patch-4_18_0-305-debugsource-1-4.el8.ppc64le.rpm
kpatch-patch-4_18_0-305_10_2-1-1.el8_4.ppc64le.rpm
kpatch-patch-4_18_0-305_10_2-debuginfo-1-1.el8_4.ppc64le.rpm
kpatch-patch-4_18_0-305_10_2-debugsource-1-1.el8_4.ppc64le.rpm
kpatch-patch-4_18_0-305_3_1-1-3.el8_4.ppc64le.rpm
kpatch-patch-4_18_0-305_3_1-debuginfo-1-3.el8_4.ppc64le.rpm
kpatch-patch-4_18_0-305_3_1-debugsource-1-3.el8_4.ppc64le.rpm
kpatch-patch-4_18_0-305_7_1-1-2.el8_4.ppc64le.rpm
kpatch-patch-4_18_0-305_7_1-debuginfo-1-2.el8_4.ppc64le.rpm
kpatch-patch-4_18_0-305_7_1-debugsource-1-2.el8_4.ppc64le.rpm
x86_64:
kpatch-patch-4_18_0-305-1-4.el8.x86_64.rpm
kpatch-patch-4_18_0-305-debuginfo-1-4.el8.x86_64.rpm
kpatch-patch-4_18_0-305-debugsource-1-4.el8.x86_64.rpm
kpatch-patch-4_18_0-305_10_2-1-1.el8_4.x86_64.rpm
kpatch-patch-4_18_0-305_10_2-debuginfo-1-1.el8_4.x86_64.rpm
kpatch-patch-4_18_0-305_10_2-debugsource-1-1.el8_4.x86_64.rpm
kpatch-patch-4_18_0-305_3_1-1-3.el8_4.x86_64.rpm
kpatch-patch-4_18_0-305_3_1-debuginfo-1-3.el8_4.x86_64.rpm
kpatch-patch-4_18_0-305_3_1-debugsource-1-3.el8_4.x86_64.rpm
kpatch-patch-4_18_0-305_7_1-1-2.el8_4.x86_64.rpm
kpatch-patch-4_18_0-305_7_1-debuginfo-1-2.el8_4.x86_64.rpm
kpatch-patch-4_18_0-305_7_1-debugsource-1-2.el8_4.x86_64.rpm
These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/
7. References:
https://access.redhat.com/security/cve/CVE-2021-3609
https://access.redhat.com/security/cve/CVE-2021-22543
https://access.redhat.com/security/cve/CVE-2021-22555
https://access.redhat.com/security/updates/classification/#important
8. Contact:
The Red Hat security contact is . More contact
details at https://access.redhat.com/security/team/contact/
Copyright 2021 Red Hat, Inc.
