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Red Hat Security Advisory
Synopsis: Important: kernel security and bug fix update
Advisory ID: RHSA-2021:2666-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:2666
Issue date: 2021-07-07
CVE Names: CVE-2020-26541 CVE-2021-33034
=====================================================================
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 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 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: use-after-free in net/bluetooth/hci_event.c when destroying an
hci_chan (CVE-2021-33034)
* kernel: security bypass in certs/blacklist.c and certs/system_keyring.c
(CVE-2020-26541)
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):
* [Azure][RHEL8.4] Two Patches Needed To Enable Azure Host Time-syncing in
VMs (BZ#1963052)
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/):
1886285 - CVE-2020-26541 kernel: security bypass in certs/blacklist.c and certs/system_keyring.c
1961305 - CVE-2021-33034 kernel: use-after-free in net/bluetooth/hci_event.c when destroying an hci_chan
6. Package List:
Red Hat Enterprise Linux BaseOS EUS (v. 8.1):
Source:
kernel-4.18.0-147.51.1.el8_1.src.rpm
aarch64:
bpftool-4.18.0-147.51.1.el8_1.aarch64.rpm
bpftool-debuginfo-4.18.0-147.51.1.el8_1.aarch64.rpm
kernel-4.18.0-147.51.1.el8_1.aarch64.rpm
kernel-core-4.18.0-147.51.1.el8_1.aarch64.rpm
kernel-cross-headers-4.18.0-147.51.1.el8_1.aarch64.rpm
kernel-debug-4.18.0-147.51.1.el8_1.aarch64.rpm
kernel-debug-core-4.18.0-147.51.1.el8_1.aarch64.rpm
kernel-debug-debuginfo-4.18.0-147.51.1.el8_1.aarch64.rpm
kernel-debug-devel-4.18.0-147.51.1.el8_1.aarch64.rpm
kernel-debug-modules-4.18.0-147.51.1.el8_1.aarch64.rpm
kernel-debug-modules-extra-4.18.0-147.51.1.el8_1.aarch64.rpm
kernel-debuginfo-4.18.0-147.51.1.el8_1.aarch64.rpm
kernel-debuginfo-common-aarch64-4.18.0-147.51.1.el8_1.aarch64.rpm
kernel-devel-4.18.0-147.51.1.el8_1.aarch64.rpm
kernel-headers-4.18.0-147.51.1.el8_1.aarch64.rpm
kernel-modules-4.18.0-147.51.1.el8_1.aarch64.rpm
kernel-modules-extra-4.18.0-147.51.1.el8_1.aarch64.rpm
kernel-tools-4.18.0-147.51.1.el8_1.aarch64.rpm
kernel-tools-debuginfo-4.18.0-147.51.1.el8_1.aarch64.rpm
kernel-tools-libs-4.18.0-147.51.1.el8_1.aarch64.rpm
perf-4.18.0-147.51.1.el8_1.aarch64.rpm
perf-debuginfo-4.18.0-147.51.1.el8_1.aarch64.rpm
python3-perf-4.18.0-147.51.1.el8_1.aarch64.rpm
python3-perf-debuginfo-4.18.0-147.51.1.el8_1.aarch64.rpm
noarch:
kernel-abi-whitelists-4.18.0-147.51.1.el8_1.noarch.rpm
kernel-doc-4.18.0-147.51.1.el8_1.noarch.rpm
ppc64le:
bpftool-4.18.0-147.51.1.el8_1.ppc64le.rpm
bpftool-debuginfo-4.18.0-147.51.1.el8_1.ppc64le.rpm
kernel-4.18.0-147.51.1.el8_1.ppc64le.rpm
kernel-core-4.18.0-147.51.1.el8_1.ppc64le.rpm
kernel-cross-headers-4.18.0-147.51.1.el8_1.ppc64le.rpm
kernel-debug-4.18.0-147.51.1.el8_1.ppc64le.rpm
kernel-debug-core-4.18.0-147.51.1.el8_1.ppc64le.rpm
kernel-debug-debuginfo-4.18.0-147.51.1.el8_1.ppc64le.rpm
kernel-debug-devel-4.18.0-147.51.1.el8_1.ppc64le.rpm
kernel-debug-modules-4.18.0-147.51.1.el8_1.ppc64le.rpm
kernel-debug-modules-extra-4.18.0-147.51.1.el8_1.ppc64le.rpm
kernel-debuginfo-4.18.0-147.51.1.el8_1.ppc64le.rpm
kernel-debuginfo-common-ppc64le-4.18.0-147.51.1.el8_1.ppc64le.rpm
kernel-devel-4.18.0-147.51.1.el8_1.ppc64le.rpm
kernel-headers-4.18.0-147.51.1.el8_1.ppc64le.rpm
kernel-modules-4.18.0-147.51.1.el8_1.ppc64le.rpm
kernel-modules-extra-4.18.0-147.51.1.el8_1.ppc64le.rpm
kernel-tools-4.18.0-147.51.1.el8_1.ppc64le.rpm
kernel-tools-debuginfo-4.18.0-147.51.1.el8_1.ppc64le.rpm
kernel-tools-libs-4.18.0-147.51.1.el8_1.ppc64le.rpm
perf-4.18.0-147.51.1.el8_1.ppc64le.rpm
perf-debuginfo-4.18.0-147.51.1.el8_1.ppc64le.rpm
python3-perf-4.18.0-147.51.1.el8_1.ppc64le.rpm
python3-perf-debuginfo-4.18.0-147.51.1.el8_1.ppc64le.rpm
s390x:
bpftool-4.18.0-147.51.1.el8_1.s390x.rpm
bpftool-debuginfo-4.18.0-147.51.1.el8_1.s390x.rpm
kernel-4.18.0-147.51.1.el8_1.s390x.rpm
kernel-core-4.18.0-147.51.1.el8_1.s390x.rpm
kernel-cross-headers-4.18.0-147.51.1.el8_1.s390x.rpm
kernel-debug-4.18.0-147.51.1.el8_1.s390x.rpm
kernel-debug-core-4.18.0-147.51.1.el8_1.s390x.rpm
kernel-debug-debuginfo-4.18.0-147.51.1.el8_1.s390x.rpm
kernel-debug-devel-4.18.0-147.51.1.el8_1.s390x.rpm
kernel-debug-modules-4.18.0-147.51.1.el8_1.s390x.rpm
kernel-debug-modules-extra-4.18.0-147.51.1.el8_1.s390x.rpm
kernel-debuginfo-4.18.0-147.51.1.el8_1.s390x.rpm
kernel-debuginfo-common-s390x-4.18.0-147.51.1.el8_1.s390x.rpm
kernel-devel-4.18.0-147.51.1.el8_1.s390x.rpm
kernel-headers-4.18.0-147.51.1.el8_1.s390x.rpm
kernel-modules-4.18.0-147.51.1.el8_1.s390x.rpm
kernel-modules-extra-4.18.0-147.51.1.el8_1.s390x.rpm
kernel-tools-4.18.0-147.51.1.el8_1.s390x.rpm
kernel-tools-debuginfo-4.18.0-147.51.1.el8_1.s390x.rpm
kernel-zfcpdump-4.18.0-147.51.1.el8_1.s390x.rpm
kernel-zfcpdump-core-4.18.0-147.51.1.el8_1.s390x.rpm
kernel-zfcpdump-debuginfo-4.18.0-147.51.1.el8_1.s390x.rpm
kernel-zfcpdump-devel-4.18.0-147.51.1.el8_1.s390x.rpm
kernel-zfcpdump-modules-4.18.0-147.51.1.el8_1.s390x.rpm
kernel-zfcpdump-modules-extra-4.18.0-147.51.1.el8_1.s390x.rpm
perf-4.18.0-147.51.1.el8_1.s390x.rpm
perf-debuginfo-4.18.0-147.51.1.el8_1.s390x.rpm
python3-perf-4.18.0-147.51.1.el8_1.s390x.rpm
python3-perf-debuginfo-4.18.0-147.51.1.el8_1.s390x.rpm
x86_64:
bpftool-4.18.0-147.51.1.el8_1.x86_64.rpm
bpftool-debuginfo-4.18.0-147.51.1.el8_1.x86_64.rpm
kernel-4.18.0-147.51.1.el8_1.x86_64.rpm
kernel-core-4.18.0-147.51.1.el8_1.x86_64.rpm
kernel-cross-headers-4.18.0-147.51.1.el8_1.x86_64.rpm
kernel-debug-4.18.0-147.51.1.el8_1.x86_64.rpm
kernel-debug-core-4.18.0-147.51.1.el8_1.x86_64.rpm
kernel-debug-debuginfo-4.18.0-147.51.1.el8_1.x86_64.rpm
kernel-debug-devel-4.18.0-147.51.1.el8_1.x86_64.rpm
kernel-debug-modules-4.18.0-147.51.1.el8_1.x86_64.rpm
kernel-debug-modules-extra-4.18.0-147.51.1.el8_1.x86_64.rpm
kernel-debuginfo-4.18.0-147.51.1.el8_1.x86_64.rpm
kernel-debuginfo-common-x86_64-4.18.0-147.51.1.el8_1.x86_64.rpm
kernel-devel-4.18.0-147.51.1.el8_1.x86_64.rpm
kernel-headers-4.18.0-147.51.1.el8_1.x86_64.rpm
kernel-modules-4.18.0-147.51.1.el8_1.x86_64.rpm
kernel-modules-extra-4.18.0-147.51.1.el8_1.x86_64.rpm
kernel-tools-4.18.0-147.51.1.el8_1.x86_64.rpm
kernel-tools-debuginfo-4.18.0-147.51.1.el8_1.x86_64.rpm
kernel-tools-libs-4.18.0-147.51.1.el8_1.x86_64.rpm
perf-4.18.0-147.51.1.el8_1.x86_64.rpm
perf-debuginfo-4.18.0-147.51.1.el8_1.x86_64.rpm
python3-perf-4.18.0-147.51.1.el8_1.x86_64.rpm
python3-perf-debuginfo-4.18.0-147.51.1.el8_1.x86_64.rpm
Red Hat CodeReady Linux Builder EUS (v. 8.1):
aarch64:
bpftool-debuginfo-4.18.0-147.51.1.el8_1.aarch64.rpm
kernel-debug-debuginfo-4.18.0-147.51.1.el8_1.aarch64.rpm
kernel-debuginfo-4.18.0-147.51.1.el8_1.aarch64.rpm
kernel-debuginfo-common-aarch64-4.18.0-147.51.1.el8_1.aarch64.rpm
kernel-tools-debuginfo-4.18.0-147.51.1.el8_1.aarch64.rpm
kernel-tools-libs-devel-4.18.0-147.51.1.el8_1.aarch64.rpm
perf-debuginfo-4.18.0-147.51.1.el8_1.aarch64.rpm
python3-perf-debuginfo-4.18.0-147.51.1.el8_1.aarch64.rpm
ppc64le:
bpftool-debuginfo-4.18.0-147.51.1.el8_1.ppc64le.rpm
kernel-debug-debuginfo-4.18.0-147.51.1.el8_1.ppc64le.rpm
kernel-debuginfo-4.18.0-147.51.1.el8_1.ppc64le.rpm
kernel-debuginfo-common-ppc64le-4.18.0-147.51.1.el8_1.ppc64le.rpm
kernel-tools-debuginfo-4.18.0-147.51.1.el8_1.ppc64le.rpm
kernel-tools-libs-devel-4.18.0-147.51.1.el8_1.ppc64le.rpm
perf-debuginfo-4.18.0-147.51.1.el8_1.ppc64le.rpm
python3-perf-debuginfo-4.18.0-147.51.1.el8_1.ppc64le.rpm
x86_64:
bpftool-debuginfo-4.18.0-147.51.1.el8_1.x86_64.rpm
kernel-debug-debuginfo-4.18.0-147.51.1.el8_1.x86_64.rpm
kernel-debuginfo-4.18.0-147.51.1.el8_1.x86_64.rpm
kernel-debuginfo-common-x86_64-4.18.0-147.51.1.el8_1.x86_64.rpm
kernel-tools-debuginfo-4.18.0-147.51.1.el8_1.x86_64.rpm
kernel-tools-libs-devel-4.18.0-147.51.1.el8_1.x86_64.rpm
perf-debuginfo-4.18.0-147.51.1.el8_1.x86_64.rpm
python3-perf-debuginfo-4.18.0-147.51.1.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-2020-26541
https://access.redhat.com/security/cve/CVE-2021-33034
https://access.redhat.com/security/updates/classification/#important
8. Contact:
The Red Hat security contact is <[email protected]>. More contact
details at https://access.redhat.com/security/team/contact/
Copyright 2021 Red Hat, Inc.
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