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ZMCIRT Vulnerability Bulletin
ZMC-2021.09.29.1100
Linux kernel: Multiple vulnerabilities
29th Sep 2021
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Product: Linux kernel
Publisher: Red Hat
Operating System: Red Hat
Impact/Access: Increased Privileges -- Existing Account
Denial of Service -- Existing Account
Access Confidential Data -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2021-3656 CVE-2021-3653
Reference: ESB-2021.3225
ESB-2021.3222
ESB-2021.3114
Original Bulletin:
https://access.redhat.com/errata/RHSA-2021:3676
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Red Hat Security Advisory
Synopsis: Moderate: kernel security, bug fix, and enhancement update
Advisory ID: RHSA-2021:3676-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:3676
Issue date: 2021-09-28
CVE Names: CVE-2021-3653 CVE-2021-3656
=====================================================================
1. Summary:
An update for kernel is now available for Red Hat Enterprise Linux 8.1
Extended Update Support.
Red Hat Product Security has rated this update as having a security impact
of Moderate. 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 CodeReady Linux Builder EUS (v. 8.1) - aarch64, ppc64le, x86_64
Red Hat Enterprise Linux BaseOS EUS (v. 8.1) - aarch64, noarch, ppc64le, s390x, x86_64
3. Description:
The kernel packages contain the Linux kernel, the core of any Linux
operating system.
Security Fix(es):
* 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.
Bug Fix(es):
* RHEL8.1 Snapshot1 - [4.18.0-128.el8.ppc64le] [ Brazos 31TB/192 Core ]
While running upstream kernel selftest case system crashed (TM)
(BZ#1996056)
* Kernel panic at n_tty_set_termios+0x30 (BZ#1998001)
Enhancement(s):
* ixgbe: ea7813c6167a [netdrv] ixgbe: fix possible deadlock in
ixgbe_service_task() (BZ#1993834)
* [Marvell 8.2 FEAT] update qla2xxx to latest upstream (BZ#2000531)
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/):
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)
6. Package List:
Red Hat Enterprise Linux BaseOS EUS (v. 8.1):
Source:
kernel-4.18.0-147.56.1.el8_1.src.rpm
aarch64:
bpftool-4.18.0-147.56.1.el8_1.aarch64.rpm
bpftool-debuginfo-4.18.0-147.56.1.el8_1.aarch64.rpm
kernel-4.18.0-147.56.1.el8_1.aarch64.rpm
kernel-core-4.18.0-147.56.1.el8_1.aarch64.rpm
kernel-cross-headers-4.18.0-147.56.1.el8_1.aarch64.rpm
kernel-debug-4.18.0-147.56.1.el8_1.aarch64.rpm
kernel-debug-core-4.18.0-147.56.1.el8_1.aarch64.rpm
kernel-debug-debuginfo-4.18.0-147.56.1.el8_1.aarch64.rpm
kernel-debug-devel-4.18.0-147.56.1.el8_1.aarch64.rpm
kernel-debug-modules-4.18.0-147.56.1.el8_1.aarch64.rpm
kernel-debug-modules-extra-4.18.0-147.56.1.el8_1.aarch64.rpm
kernel-debuginfo-4.18.0-147.56.1.el8_1.aarch64.rpm
kernel-debuginfo-common-aarch64-4.18.0-147.56.1.el8_1.aarch64.rpm
kernel-devel-4.18.0-147.56.1.el8_1.aarch64.rpm
kernel-headers-4.18.0-147.56.1.el8_1.aarch64.rpm
kernel-modules-4.18.0-147.56.1.el8_1.aarch64.rpm
kernel-modules-extra-4.18.0-147.56.1.el8_1.aarch64.rpm
kernel-tools-4.18.0-147.56.1.el8_1.aarch64.rpm
kernel-tools-debuginfo-4.18.0-147.56.1.el8_1.aarch64.rpm
kernel-tools-libs-4.18.0-147.56.1.el8_1.aarch64.rpm
perf-4.18.0-147.56.1.el8_1.aarch64.rpm
perf-debuginfo-4.18.0-147.56.1.el8_1.aarch64.rpm
python3-perf-4.18.0-147.56.1.el8_1.aarch64.rpm
python3-perf-debuginfo-4.18.0-147.56.1.el8_1.aarch64.rpm
noarch:
kernel-abi-whitelists-4.18.0-147.56.1.el8_1.noarch.rpm
kernel-doc-4.18.0-147.56.1.el8_1.noarch.rpm
ppc64le:
bpftool-4.18.0-147.56.1.el8_1.ppc64le.rpm
bpftool-debuginfo-4.18.0-147.56.1.el8_1.ppc64le.rpm
kernel-4.18.0-147.56.1.el8_1.ppc64le.rpm
kernel-core-4.18.0-147.56.1.el8_1.ppc64le.rpm
kernel-cross-headers-4.18.0-147.56.1.el8_1.ppc64le.rpm
kernel-debug-4.18.0-147.56.1.el8_1.ppc64le.rpm
kernel-debug-core-4.18.0-147.56.1.el8_1.ppc64le.rpm
kernel-debug-debuginfo-4.18.0-147.56.1.el8_1.ppc64le.rpm
kernel-debug-devel-4.18.0-147.56.1.el8_1.ppc64le.rpm
kernel-debug-modules-4.18.0-147.56.1.el8_1.ppc64le.rpm
kernel-debug-modules-extra-4.18.0-147.56.1.el8_1.ppc64le.rpm
kernel-debuginfo-4.18.0-147.56.1.el8_1.ppc64le.rpm
kernel-debuginfo-common-ppc64le-4.18.0-147.56.1.el8_1.ppc64le.rpm
kernel-devel-4.18.0-147.56.1.el8_1.ppc64le.rpm
kernel-headers-4.18.0-147.56.1.el8_1.ppc64le.rpm
kernel-modules-4.18.0-147.56.1.el8_1.ppc64le.rpm
kernel-modules-extra-4.18.0-147.56.1.el8_1.ppc64le.rpm
kernel-tools-4.18.0-147.56.1.el8_1.ppc64le.rpm
kernel-tools-debuginfo-4.18.0-147.56.1.el8_1.ppc64le.rpm
kernel-tools-libs-4.18.0-147.56.1.el8_1.ppc64le.rpm
perf-4.18.0-147.56.1.el8_1.ppc64le.rpm
perf-debuginfo-4.18.0-147.56.1.el8_1.ppc64le.rpm
python3-perf-4.18.0-147.56.1.el8_1.ppc64le.rpm
python3-perf-debuginfo-4.18.0-147.56.1.el8_1.ppc64le.rpm
s390x:
bpftool-4.18.0-147.56.1.el8_1.s390x.rpm
bpftool-debuginfo-4.18.0-147.56.1.el8_1.s390x.rpm
kernel-4.18.0-147.56.1.el8_1.s390x.rpm
kernel-core-4.18.0-147.56.1.el8_1.s390x.rpm
kernel-cross-headers-4.18.0-147.56.1.el8_1.s390x.rpm
kernel-debug-4.18.0-147.56.1.el8_1.s390x.rpm
kernel-debug-core-4.18.0-147.56.1.el8_1.s390x.rpm
kernel-debug-debuginfo-4.18.0-147.56.1.el8_1.s390x.rpm
kernel-debug-devel-4.18.0-147.56.1.el8_1.s390x.rpm
kernel-debug-modules-4.18.0-147.56.1.el8_1.s390x.rpm
kernel-debug-modules-extra-4.18.0-147.56.1.el8_1.s390x.rpm
kernel-debuginfo-4.18.0-147.56.1.el8_1.s390x.rpm
kernel-debuginfo-common-s390x-4.18.0-147.56.1.el8_1.s390x.rpm
kernel-devel-4.18.0-147.56.1.el8_1.s390x.rpm
kernel-headers-4.18.0-147.56.1.el8_1.s390x.rpm
kernel-modules-4.18.0-147.56.1.el8_1.s390x.rpm
kernel-modules-extra-4.18.0-147.56.1.el8_1.s390x.rpm
kernel-tools-4.18.0-147.56.1.el8_1.s390x.rpm
kernel-tools-debuginfo-4.18.0-147.56.1.el8_1.s390x.rpm
kernel-zfcpdump-4.18.0-147.56.1.el8_1.s390x.rpm
kernel-zfcpdump-core-4.18.0-147.56.1.el8_1.s390x.rpm
kernel-zfcpdump-debuginfo-4.18.0-147.56.1.el8_1.s390x.rpm
kernel-zfcpdump-devel-4.18.0-147.56.1.el8_1.s390x.rpm
kernel-zfcpdump-modules-4.18.0-147.56.1.el8_1.s390x.rpm
kernel-zfcpdump-modules-extra-4.18.0-147.56.1.el8_1.s390x.rpm
perf-4.18.0-147.56.1.el8_1.s390x.rpm
perf-debuginfo-4.18.0-147.56.1.el8_1.s390x.rpm
python3-perf-4.18.0-147.56.1.el8_1.s390x.rpm
python3-perf-debuginfo-4.18.0-147.56.1.el8_1.s390x.rpm
x86_64:
bpftool-4.18.0-147.56.1.el8_1.x86_64.rpm
bpftool-debuginfo-4.18.0-147.56.1.el8_1.x86_64.rpm
kernel-4.18.0-147.56.1.el8_1.x86_64.rpm
kernel-core-4.18.0-147.56.1.el8_1.x86_64.rpm
kernel-cross-headers-4.18.0-147.56.1.el8_1.x86_64.rpm
kernel-debug-4.18.0-147.56.1.el8_1.x86_64.rpm
kernel-debug-core-4.18.0-147.56.1.el8_1.x86_64.rpm
kernel-debug-debuginfo-4.18.0-147.56.1.el8_1.x86_64.rpm
kernel-debug-devel-4.18.0-147.56.1.el8_1.x86_64.rpm
kernel-debug-modules-4.18.0-147.56.1.el8_1.x86_64.rpm
kernel-debug-modules-extra-4.18.0-147.56.1.el8_1.x86_64.rpm
kernel-debuginfo-4.18.0-147.56.1.el8_1.x86_64.rpm
kernel-debuginfo-common-x86_64-4.18.0-147.56.1.el8_1.x86_64.rpm
kernel-devel-4.18.0-147.56.1.el8_1.x86_64.rpm
kernel-headers-4.18.0-147.56.1.el8_1.x86_64.rpm
kernel-modules-4.18.0-147.56.1.el8_1.x86_64.rpm
kernel-modules-extra-4.18.0-147.56.1.el8_1.x86_64.rpm
kernel-tools-4.18.0-147.56.1.el8_1.x86_64.rpm
kernel-tools-debuginfo-4.18.0-147.56.1.el8_1.x86_64.rpm
kernel-tools-libs-4.18.0-147.56.1.el8_1.x86_64.rpm
perf-4.18.0-147.56.1.el8_1.x86_64.rpm
perf-debuginfo-4.18.0-147.56.1.el8_1.x86_64.rpm
python3-perf-4.18.0-147.56.1.el8_1.x86_64.rpm
python3-perf-debuginfo-4.18.0-147.56.1.el8_1.x86_64.rpm
Red Hat CodeReady Linux Builder EUS (v. 8.1):
aarch64:
bpftool-debuginfo-4.18.0-147.56.1.el8_1.aarch64.rpm
kernel-debug-debuginfo-4.18.0-147.56.1.el8_1.aarch64.rpm
kernel-debuginfo-4.18.0-147.56.1.el8_1.aarch64.rpm
kernel-debuginfo-common-aarch64-4.18.0-147.56.1.el8_1.aarch64.rpm
kernel-tools-debuginfo-4.18.0-147.56.1.el8_1.aarch64.rpm
kernel-tools-libs-devel-4.18.0-147.56.1.el8_1.aarch64.rpm
perf-debuginfo-4.18.0-147.56.1.el8_1.aarch64.rpm
python3-perf-debuginfo-4.18.0-147.56.1.el8_1.aarch64.rpm
ppc64le:
bpftool-debuginfo-4.18.0-147.56.1.el8_1.ppc64le.rpm
kernel-debug-debuginfo-4.18.0-147.56.1.el8_1.ppc64le.rpm
kernel-debuginfo-4.18.0-147.56.1.el8_1.ppc64le.rpm
kernel-debuginfo-common-ppc64le-4.18.0-147.56.1.el8_1.ppc64le.rpm
kernel-tools-debuginfo-4.18.0-147.56.1.el8_1.ppc64le.rpm
kernel-tools-libs-devel-4.18.0-147.56.1.el8_1.ppc64le.rpm
perf-debuginfo-4.18.0-147.56.1.el8_1.ppc64le.rpm
python3-perf-debuginfo-4.18.0-147.56.1.el8_1.ppc64le.rpm
x86_64:
bpftool-debuginfo-4.18.0-147.56.1.el8_1.x86_64.rpm
kernel-debug-debuginfo-4.18.0-147.56.1.el8_1.x86_64.rpm
kernel-debuginfo-4.18.0-147.56.1.el8_1.x86_64.rpm
kernel-debuginfo-common-x86_64-4.18.0-147.56.1.el8_1.x86_64.rpm
kernel-tools-debuginfo-4.18.0-147.56.1.el8_1.x86_64.rpm
kernel-tools-libs-devel-4.18.0-147.56.1.el8_1.x86_64.rpm
perf-debuginfo-4.18.0-147.56.1.el8_1.x86_64.rpm
python3-perf-debuginfo-4.18.0-147.56.1.el8_1.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/updates/classification/#moderate
8. Contact:
The Red Hat security contact is . More contact
details at https://access.redhat.com/security/team/contact/
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in this document is accurate. However, the decision to use the information
described is the responsibility of each user or organisation. The decision to
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the responsibility of each user or organisation, and should be considered in
accordance with your organisation's site policies and procedures. ZMCERT
takes no responsibility for consequences which may arise from following or
acting on information or advice contained in this security bulletin.
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