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AUSCERT External Security Bulletin Redistribution
ESB-2021.1434
kernel-alt security and bug fix update
28 April 2021
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: kernel-alt
Publisher: Red Hat
Operating System: Red Hat
Impact/Access: Execute Arbitrary Code/Commands -- Existing Account
Increased Privileges -- Existing Account
Denial of Service -- Existing Account
Access Confidential Data -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2021-27365 CVE-2021-27364 CVE-2021-3347
CVE-2020-11669
Reference: ESB-2021.1406
ESB-2021.1340
ESB-2020.1585
Original Bulletin:
https://access.redhat.com/errata/RHSA-2021:1379
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Red Hat Security Advisory
Synopsis: Important: kernel-alt security and bug fix update
Advisory ID: RHSA-2021:1379-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:1379
Issue date: 2021-04-27
CVE Names: CVE-2020-11669 CVE-2021-3347 CVE-2021-27364
CVE-2021-27365
=====================================================================
1. Summary:
An update for kernel-alt is now available for Red Hat Enterprise Linux 7.
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 for ARM and IBM Power LE (POWER9) Server (v. 7) - aarch64, noarch, ppc64le, s390x
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) - aarch64, noarch, ppc64le
3. Description:
The kernel-alt packages provide the Linux kernel version 4.x.
Security Fix(es):
* kernel: Use after free via PI futex state (CVE-2021-3347)
* kernel: out-of-bounds read in libiscsi module (CVE-2021-27364)
* kernel: heap buffer overflow in the iSCSI subsystem (CVE-2021-27365)
* kernel: powerpc: guest can cause DoS on POWER9 KVM hosts (CVE-2020-11669)
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):
* Kernel oops when resizing ext4 filesystem [rhel-alt-7.6.z] (BZ#1790900)
* [ipv6][ipsec]:unregister_netdevice: waiting for lo to become free. Usage
count = 4 (BZ#1920805)
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/):
1824803 - CVE-2020-11669 kernel: powerpc: guest can cause DoS on POWER9 KVM hosts
1922249 - CVE-2021-3347 kernel: Use after free via PI futex state
1930078 - CVE-2021-27365 kernel: heap buffer overflow in the iSCSI subsystem
1930080 - CVE-2021-27364 kernel: out-of-bounds read in libiscsi module
6. Package List:
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7):
Source:
kernel-alt-4.14.0-115.36.1.el7a.src.rpm
aarch64:
kernel-4.14.0-115.36.1.el7a.aarch64.rpm
kernel-debug-4.14.0-115.36.1.el7a.aarch64.rpm
kernel-debug-debuginfo-4.14.0-115.36.1.el7a.aarch64.rpm
kernel-debug-devel-4.14.0-115.36.1.el7a.aarch64.rpm
kernel-debuginfo-4.14.0-115.36.1.el7a.aarch64.rpm
kernel-debuginfo-common-aarch64-4.14.0-115.36.1.el7a.aarch64.rpm
kernel-devel-4.14.0-115.36.1.el7a.aarch64.rpm
kernel-headers-4.14.0-115.36.1.el7a.aarch64.rpm
kernel-tools-4.14.0-115.36.1.el7a.aarch64.rpm
kernel-tools-debuginfo-4.14.0-115.36.1.el7a.aarch64.rpm
kernel-tools-libs-4.14.0-115.36.1.el7a.aarch64.rpm
perf-4.14.0-115.36.1.el7a.aarch64.rpm
perf-debuginfo-4.14.0-115.36.1.el7a.aarch64.rpm
python-perf-4.14.0-115.36.1.el7a.aarch64.rpm
python-perf-debuginfo-4.14.0-115.36.1.el7a.aarch64.rpm
noarch:
kernel-abi-whitelists-4.14.0-115.36.1.el7a.noarch.rpm
kernel-doc-4.14.0-115.36.1.el7a.noarch.rpm
ppc64le:
kernel-4.14.0-115.36.1.el7a.ppc64le.rpm
kernel-bootwrapper-4.14.0-115.36.1.el7a.ppc64le.rpm
kernel-debug-4.14.0-115.36.1.el7a.ppc64le.rpm
kernel-debug-debuginfo-4.14.0-115.36.1.el7a.ppc64le.rpm
kernel-debuginfo-4.14.0-115.36.1.el7a.ppc64le.rpm
kernel-debuginfo-common-ppc64le-4.14.0-115.36.1.el7a.ppc64le.rpm
kernel-devel-4.14.0-115.36.1.el7a.ppc64le.rpm
kernel-headers-4.14.0-115.36.1.el7a.ppc64le.rpm
kernel-tools-4.14.0-115.36.1.el7a.ppc64le.rpm
kernel-tools-debuginfo-4.14.0-115.36.1.el7a.ppc64le.rpm
kernel-tools-libs-4.14.0-115.36.1.el7a.ppc64le.rpm
perf-4.14.0-115.36.1.el7a.ppc64le.rpm
perf-debuginfo-4.14.0-115.36.1.el7a.ppc64le.rpm
python-perf-4.14.0-115.36.1.el7a.ppc64le.rpm
python-perf-debuginfo-4.14.0-115.36.1.el7a.ppc64le.rpm
s390x:
kernel-4.14.0-115.36.1.el7a.s390x.rpm
kernel-debug-4.14.0-115.36.1.el7a.s390x.rpm
kernel-debug-debuginfo-4.14.0-115.36.1.el7a.s390x.rpm
kernel-debug-devel-4.14.0-115.36.1.el7a.s390x.rpm
kernel-debuginfo-4.14.0-115.36.1.el7a.s390x.rpm
kernel-debuginfo-common-s390x-4.14.0-115.36.1.el7a.s390x.rpm
kernel-devel-4.14.0-115.36.1.el7a.s390x.rpm
kernel-headers-4.14.0-115.36.1.el7a.s390x.rpm
kernel-kdump-4.14.0-115.36.1.el7a.s390x.rpm
kernel-kdump-debuginfo-4.14.0-115.36.1.el7a.s390x.rpm
kernel-kdump-devel-4.14.0-115.36.1.el7a.s390x.rpm
perf-4.14.0-115.36.1.el7a.s390x.rpm
perf-debuginfo-4.14.0-115.36.1.el7a.s390x.rpm
python-perf-4.14.0-115.36.1.el7a.s390x.rpm
python-perf-debuginfo-4.14.0-115.36.1.el7a.s390x.rpm
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7):
aarch64:
kernel-debug-debuginfo-4.14.0-115.36.1.el7a.aarch64.rpm
kernel-debuginfo-4.14.0-115.36.1.el7a.aarch64.rpm
kernel-debuginfo-common-aarch64-4.14.0-115.36.1.el7a.aarch64.rpm
kernel-tools-debuginfo-4.14.0-115.36.1.el7a.aarch64.rpm
kernel-tools-libs-devel-4.14.0-115.36.1.el7a.aarch64.rpm
perf-debuginfo-4.14.0-115.36.1.el7a.aarch64.rpm
python-perf-debuginfo-4.14.0-115.36.1.el7a.aarch64.rpm
noarch:
kernel-doc-4.14.0-115.36.1.el7a.noarch.rpm
ppc64le:
kernel-debug-debuginfo-4.14.0-115.36.1.el7a.ppc64le.rpm
kernel-debug-devel-4.14.0-115.36.1.el7a.ppc64le.rpm
kernel-debuginfo-4.14.0-115.36.1.el7a.ppc64le.rpm
kernel-debuginfo-common-ppc64le-4.14.0-115.36.1.el7a.ppc64le.rpm
kernel-tools-debuginfo-4.14.0-115.36.1.el7a.ppc64le.rpm
kernel-tools-libs-devel-4.14.0-115.36.1.el7a.ppc64le.rpm
perf-debuginfo-4.14.0-115.36.1.el7a.ppc64le.rpm
python-perf-debuginfo-4.14.0-115.36.1.el7a.ppc64le.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-2020-11669
https://access.redhat.com/security/cve/CVE-2021-3347
https://access.redhat.com/security/cve/CVE-2021-27364
https://access.redhat.com/security/cve/CVE-2021-27365
https://access.redhat.com/security/updates/classification/#important
8. Contact:
The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/
Copyright 2021 Red Hat, Inc.
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