RedHat: RHSA-2021-3812:01 Important: kernel security update

Advisories

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

=====================================================================
                   Red Hat Security Advisory

Synopsis:          Important: kernel security update
Advisory ID:       RHSA-2021:3812-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2021:3812
Issue date:        2021-10-12
CVE Names:         CVE-2021-3653 CVE-2021-3656 CVE-2021-22543 
                   CVE-2021-22555 CVE-2021-37576 
=====================================================================

1. Summary:

An update for kernel is now available for Red Hat Enterprise Linux 7.6
Advanced Update Support, Red Hat Enterprise Linux 7.6 Telco Extended Update
Support, and Red Hat Enterprise Linux 7.6 Update Services for SAP
Solutions.

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 Server AUS (v. 7.6) - noarch, x86_64
Red Hat Enterprise Linux Server E4S (v. 7.6) - noarch, ppc64le, x86_64
Red Hat Enterprise Linux Server Optional AUS (v. 7.6) - x86_64
Red Hat Enterprise Linux Server Optional E4S (v. 7.6) - ppc64le, x86_64
Red Hat Enterprise Linux Server Optional TUS (v. 7.6) - x86_64
Red Hat Enterprise Linux Server TUS (v. 7.6) - noarch, x86_64

3. Description:

The kernel packages contain the Linux kernel, the core of any Linux
operating system.

Security Fix(es):

* 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)

* kernel: powerpc: KVM guest OS users can cause host OS memory corruption
(CVE-2021-37576)

* kernel: SVM nested virtualization issue in KVM (AVIC support)
(CVE-2021-3653)

* kernel: SVM nested virtualization issue in KVM (VMLOAD/VMSAVE)
(CVE-2021-3656)

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

The system must be rebooted for this update to take effect.

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
1980101 - CVE-2021-22555 kernel: out-of-bounds write in xt_compat_target_from_user() in net/netfilter/x_tables.c
1983686 - CVE-2021-3653 kernel: SVM nested virtualization issue in KVM (AVIC support)
1983988 - CVE-2021-3656 kernel: SVM nested virtualization issue in KVM (VMLOAD/VMSAVE)
1986506 - CVE-2021-37576 kernel: powerpc: KVM guest OS users can cause host OS memory corruption

6. Package List:

Red Hat Enterprise Linux Server AUS (v. 7.6):

Source:
kernel-3.10.0-957.84.1.el7.src.rpm

noarch:
kernel-abi-whitelists-3.10.0-957.84.1.el7.noarch.rpm
kernel-doc-3.10.0-957.84.1.el7.noarch.rpm

x86_64:
bpftool-3.10.0-957.84.1.el7.x86_64.rpm
kernel-3.10.0-957.84.1.el7.x86_64.rpm
kernel-debug-3.10.0-957.84.1.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm
kernel-debug-devel-3.10.0-957.84.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-957.84.1.el7.x86_64.rpm
kernel-devel-3.10.0-957.84.1.el7.x86_64.rpm
kernel-headers-3.10.0-957.84.1.el7.x86_64.rpm
kernel-tools-3.10.0-957.84.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm
kernel-tools-libs-3.10.0-957.84.1.el7.x86_64.rpm
perf-3.10.0-957.84.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm
python-perf-3.10.0-957.84.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm

Red Hat Enterprise Linux Server E4S (v. 7.6):

Source:
kernel-3.10.0-957.84.1.el7.src.rpm

noarch:
kernel-abi-whitelists-3.10.0-957.84.1.el7.noarch.rpm
kernel-doc-3.10.0-957.84.1.el7.noarch.rpm

ppc64le:
kernel-3.10.0-957.84.1.el7.ppc64le.rpm
kernel-bootwrapper-3.10.0-957.84.1.el7.ppc64le.rpm
kernel-debug-3.10.0-957.84.1.el7.ppc64le.rpm
kernel-debug-debuginfo-3.10.0-957.84.1.el7.ppc64le.rpm
kernel-debuginfo-3.10.0-957.84.1.el7.ppc64le.rpm
kernel-debuginfo-common-ppc64le-3.10.0-957.84.1.el7.ppc64le.rpm
kernel-devel-3.10.0-957.84.1.el7.ppc64le.rpm
kernel-headers-3.10.0-957.84.1.el7.ppc64le.rpm
kernel-tools-3.10.0-957.84.1.el7.ppc64le.rpm
kernel-tools-debuginfo-3.10.0-957.84.1.el7.ppc64le.rpm
kernel-tools-libs-3.10.0-957.84.1.el7.ppc64le.rpm
perf-3.10.0-957.84.1.el7.ppc64le.rpm
perf-debuginfo-3.10.0-957.84.1.el7.ppc64le.rpm
python-perf-3.10.0-957.84.1.el7.ppc64le.rpm
python-perf-debuginfo-3.10.0-957.84.1.el7.ppc64le.rpm

x86_64:
kernel-3.10.0-957.84.1.el7.x86_64.rpm
kernel-debug-3.10.0-957.84.1.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm
kernel-debug-devel-3.10.0-957.84.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-957.84.1.el7.x86_64.rpm
kernel-devel-3.10.0-957.84.1.el7.x86_64.rpm
kernel-headers-3.10.0-957.84.1.el7.x86_64.rpm
kernel-tools-3.10.0-957.84.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm
kernel-tools-libs-3.10.0-957.84.1.el7.x86_64.rpm
perf-3.10.0-957.84.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm
python-perf-3.10.0-957.84.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm

Red Hat Enterprise Linux Server TUS (v. 7.6):

Source:
kernel-3.10.0-957.84.1.el7.src.rpm

noarch:
kernel-abi-whitelists-3.10.0-957.84.1.el7.noarch.rpm
kernel-doc-3.10.0-957.84.1.el7.noarch.rpm

x86_64:
bpftool-3.10.0-957.84.1.el7.x86_64.rpm
kernel-3.10.0-957.84.1.el7.x86_64.rpm
kernel-debug-3.10.0-957.84.1.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm
kernel-debug-devel-3.10.0-957.84.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-957.84.1.el7.x86_64.rpm
kernel-devel-3.10.0-957.84.1.el7.x86_64.rpm
kernel-headers-3.10.0-957.84.1.el7.x86_64.rpm
kernel-tools-3.10.0-957.84.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm
kernel-tools-libs-3.10.0-957.84.1.el7.x86_64.rpm
perf-3.10.0-957.84.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm
python-perf-3.10.0-957.84.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm

Red Hat Enterprise Linux Server Optional AUS (v. 7.6):

x86_64:
kernel-debug-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-957.84.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm
kernel-tools-libs-devel-3.10.0-957.84.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm

Red Hat Enterprise Linux Server Optional E4S (v. 7.6):

ppc64le:
kernel-debug-debuginfo-3.10.0-957.84.1.el7.ppc64le.rpm
kernel-debug-devel-3.10.0-957.84.1.el7.ppc64le.rpm
kernel-debuginfo-3.10.0-957.84.1.el7.ppc64le.rpm
kernel-debuginfo-common-ppc64le-3.10.0-957.84.1.el7.ppc64le.rpm
kernel-tools-debuginfo-3.10.0-957.84.1.el7.ppc64le.rpm
kernel-tools-libs-devel-3.10.0-957.84.1.el7.ppc64le.rpm
perf-debuginfo-3.10.0-957.84.1.el7.ppc64le.rpm
python-perf-debuginfo-3.10.0-957.84.1.el7.ppc64le.rpm

x86_64:
kernel-debug-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-957.84.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm
kernel-tools-libs-devel-3.10.0-957.84.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm

Red Hat Enterprise Linux Server Optional TUS (v. 7.6):

x86_64:
kernel-debug-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-957.84.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm
kernel-tools-libs-devel-3.10.0-957.84.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-957.84.1.el7.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-2021-3653
https://access.redhat.com/security/cve/CVE-2021-3656
https://access.redhat.com/security/cve/CVE-2021-22543
https://access.redhat.com/security/cve/CVE-2021-22555
https://access.redhat.com/security/cve/CVE-2021-37576
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.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1

iQIVAwUBYWWkrNzjgjWX9erEAQgeVg//eBUd0HQYAc3u6Nc1nBOOBM+SWHAI6rwT
SWbLidMennvaCylOWpdL23fkpPkhCRyj5fbXen2dQGtUop2sEm6nmVLFW6cQO8Yv
rfXN3wnrW8P0Ah3QtWeV1O22ah8WzcgeML96xyUl3K7yJSY+evXYYBUM7Q8nbzW1
0K7VJm79SxRsszcNq3R/mG5MuPJV+cSnSlG+1cqK+A+YRVKDIE/7vWiTS1z9GDlY
/DIlKzvEcsyaOFnKYg+RQRQ5HCB5Hp2JNjRrz5F+X+KJRoT6KTDlbFY/a34FjYWA
fUN3pA0aQtdGgQsAB6+T+pVGTYq0vRWPOXhnN2OaN7a95OwbVC9DmiQXwjLQnn2C
rvU52ExQP6Jf+WfNHo7yfFMgR1Eyihkc+/zf0qPQomuEqMjEfqyMXOoPsCoXotGs
OBJEVIYvBmA7CYif9L0cQRNJyTFfv1IcXKgP2UgrGdChQnLBz/ijVUU17HcU783R
G6hXh2+Ojllbt5/rf2PQfFZYjswIVuGe9/You+T6qQXJ+zInz1GOi92+Vwv+gEGF
KNLqZJ1nvB1xOm60noCBhnke5vPbzFA+YNGSJnc0tLxZ6Dek891Qb1Eq1f+rwR/9
wfCEgECYLoGvlc2RXC12m13BLUTL+VjVyc0KmG/O9vjFD42EzeFo8rpuXjVsF7QJ
S627544rR1c=
=4NQZ
-----END PGP SIGNATURE-----

--
RHSA-announce mailing list
[email protected]
https://listman.redhat.com/mailman/listinfo/rhsa-announce

RedHat: RHSA-2021-3812:01 Important: kernel security update

Summary

The kernel packages contain the Linux kernel, the core of any Linux operating system.
Security Fix(es):
* 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)
* kernel: powerpc: KVM guest OS users can cause host OS memory corruption (CVE-2021-37576)
* kernel: SVM nested virtualization issue in KVM (AVIC support) (CVE-2021-3653)
* kernel: SVM nested virtualization issue in KVM (VMLOAD/VMSAVE) (CVE-2021-3656)
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.

Solution

For details on how to apply this update, which includes the changesdescribed in this advisory, refer to:https://access.redhat.com/articles/11258The system must be rebooted for this update to take effect.

References

https://access.redhat.com/security/cve/CVE-2021-3653 https://access.redhat.com/security/cve/CVE-2021-3656 https://access.redhat.com/security/cve/CVE-2021-22543 https://access.redhat.com/security/cve/CVE-2021-22555 https://access.redhat.com/security/cve/CVE-2021-37576 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux Server AUS (v. 7.6):
Source: kernel-3.10.0-957.84.1.el7.src.rpm
noarch: kernel-abi-whitelists-3.10.0-957.84.1.el7.noarch.rpm kernel-doc-3.10.0-957.84.1.el7.noarch.rpm
x86_64: bpftool-3.10.0-957.84.1.el7.x86_64.rpm kernel-3.10.0-957.84.1.el7.x86_64.rpm kernel-debug-3.10.0-957.84.1.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm kernel-debug-devel-3.10.0-957.84.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-957.84.1.el7.x86_64.rpm kernel-devel-3.10.0-957.84.1.el7.x86_64.rpm kernel-headers-3.10.0-957.84.1.el7.x86_64.rpm kernel-tools-3.10.0-957.84.1.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm kernel-tools-libs-3.10.0-957.84.1.el7.x86_64.rpm perf-3.10.0-957.84.1.el7.x86_64.rpm perf-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm python-perf-3.10.0-957.84.1.el7.x86_64.rpm python-perf-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm
Red Hat Enterprise Linux Server E4S (v. 7.6):
Source: kernel-3.10.0-957.84.1.el7.src.rpm
noarch: kernel-abi-whitelists-3.10.0-957.84.1.el7.noarch.rpm kernel-doc-3.10.0-957.84.1.el7.noarch.rpm
ppc64le: kernel-3.10.0-957.84.1.el7.ppc64le.rpm kernel-bootwrapper-3.10.0-957.84.1.el7.ppc64le.rpm kernel-debug-3.10.0-957.84.1.el7.ppc64le.rpm kernel-debug-debuginfo-3.10.0-957.84.1.el7.ppc64le.rpm kernel-debuginfo-3.10.0-957.84.1.el7.ppc64le.rpm kernel-debuginfo-common-ppc64le-3.10.0-957.84.1.el7.ppc64le.rpm kernel-devel-3.10.0-957.84.1.el7.ppc64le.rpm kernel-headers-3.10.0-957.84.1.el7.ppc64le.rpm kernel-tools-3.10.0-957.84.1.el7.ppc64le.rpm kernel-tools-debuginfo-3.10.0-957.84.1.el7.ppc64le.rpm kernel-tools-libs-3.10.0-957.84.1.el7.ppc64le.rpm perf-3.10.0-957.84.1.el7.ppc64le.rpm perf-debuginfo-3.10.0-957.84.1.el7.ppc64le.rpm python-perf-3.10.0-957.84.1.el7.ppc64le.rpm python-perf-debuginfo-3.10.0-957.84.1.el7.ppc64le.rpm
x86_64: kernel-3.10.0-957.84.1.el7.x86_64.rpm kernel-debug-3.10.0-957.84.1.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm kernel-debug-devel-3.10.0-957.84.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-957.84.1.el7.x86_64.rpm kernel-devel-3.10.0-957.84.1.el7.x86_64.rpm kernel-headers-3.10.0-957.84.1.el7.x86_64.rpm kernel-tools-3.10.0-957.84.1.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm kernel-tools-libs-3.10.0-957.84.1.el7.x86_64.rpm perf-3.10.0-957.84.1.el7.x86_64.rpm perf-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm python-perf-3.10.0-957.84.1.el7.x86_64.rpm python-perf-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm
Red Hat Enterprise Linux Server TUS (v. 7.6):
Source: kernel-3.10.0-957.84.1.el7.src.rpm
noarch: kernel-abi-whitelists-3.10.0-957.84.1.el7.noarch.rpm kernel-doc-3.10.0-957.84.1.el7.noarch.rpm
x86_64: bpftool-3.10.0-957.84.1.el7.x86_64.rpm kernel-3.10.0-957.84.1.el7.x86_64.rpm kernel-debug-3.10.0-957.84.1.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm kernel-debug-devel-3.10.0-957.84.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-957.84.1.el7.x86_64.rpm kernel-devel-3.10.0-957.84.1.el7.x86_64.rpm kernel-headers-3.10.0-957.84.1.el7.x86_64.rpm kernel-tools-3.10.0-957.84.1.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm kernel-tools-libs-3.10.0-957.84.1.el7.x86_64.rpm perf-3.10.0-957.84.1.el7.x86_64.rpm perf-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm python-perf-3.10.0-957.84.1.el7.x86_64.rpm python-perf-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm
Red Hat Enterprise Linux Server Optional AUS (v. 7.6):
x86_64: kernel-debug-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-957.84.1.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm kernel-tools-libs-devel-3.10.0-957.84.1.el7.x86_64.rpm perf-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm python-perf-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm
Red Hat Enterprise Linux Server Optional E4S (v. 7.6):
ppc64le: kernel-debug-debuginfo-3.10.0-957.84.1.el7.ppc64le.rpm kernel-debug-devel-3.10.0-957.84.1.el7.ppc64le.rpm kernel-debuginfo-3.10.0-957.84.1.el7.ppc64le.rpm kernel-debuginfo-common-ppc64le-3.10.0-957.84.1.el7.ppc64le.rpm kernel-tools-debuginfo-3.10.0-957.84.1.el7.ppc64le.rpm kernel-tools-libs-devel-3.10.0-957.84.1.el7.ppc64le.rpm perf-debuginfo-3.10.0-957.84.1.el7.ppc64le.rpm python-perf-debuginfo-3.10.0-957.84.1.el7.ppc64le.rpm
x86_64: kernel-debug-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-957.84.1.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm kernel-tools-libs-devel-3.10.0-957.84.1.el7.x86_64.rpm perf-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm python-perf-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm
Red Hat Enterprise Linux Server Optional TUS (v. 7.6):
x86_64: kernel-debug-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-957.84.1.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm kernel-tools-libs-devel-3.10.0-957.84.1.el7.x86_64.rpm perf-debuginfo-3.10.0-957.84.1.el7.x86_64.rpm python-perf-debuginfo-3.10.0-957.84.1.el7.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/

Severity
Advisory ID: RHSA-2021:3812-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:3812
Issued Date: : 2021-10-12
CVE Names: CVE-2021-3653 CVE-2021-3656 CVE-2021-22543 CVE-2021-22555 CVE-2021-37576

Topic

An update for kernel is now available for Red Hat Enterprise Linux 7.6Advanced Update Support, Red Hat Enterprise Linux 7.6 Telco Extended UpdateSupport, and Red Hat Enterprise Linux 7.6 Update Services for SAPSolutions.Red Hat Product Security has rated this update as having a security impactof Important. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available for each vulnerabilityfrom the CVE link(s) in the References section.

Relevant Releases Architectures

Red Hat Enterprise Linux Server AUS (v. 7.6) - noarch, x86_64

Red Hat Enterprise Linux Server E4S (v. 7.6) - noarch, ppc64le, x86_64

Red Hat Enterprise Linux Server Optional AUS (v. 7.6) - x86_64

Red Hat Enterprise Linux Server Optional E4S (v. 7.6) - ppc64le, x86_64

Red Hat Enterprise Linux Server Optional TUS (v. 7.6) - x86_64

Red Hat Enterprise Linux Server TUS (v. 7.6) - noarch, x86_64

Bugs Fixed

1965461 - CVE-2021-22543 kernel: Improper handling of VM_IO|VM_PFNMAP vmas in KVM can bypass RO checks

1980101 - CVE-2021-22555 kernel: out-of-bounds write in xt_compat_target_from_user() in net/netfilter/x_tables.c

1983686 - CVE-2021-3653 kernel: SVM nested virtualization issue in KVM (AVIC support)

1983988 - CVE-2021-3656 kernel: SVM nested virtualization issue in KVM (VMLOAD/VMSAVE)

1986506 - CVE-2021-37576 kernel: powerpc: KVM guest OS users can cause host OS memory corruption

We use cookies to provide and improve our services. By using our site, you consent to our Cookie Policy.