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Red Hat Security Advisory
Synopsis: Important: kernel security and bug fix update
Advisory ID: RHSA-2021:3399-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:3399
Issue date: 2021-08-31
CVE Names: CVE-2021-3347 CVE-2021-22555 CVE-2021-32399
=====================================================================
1. Summary:
An update for kernel is now available for Red Hat Enterprise Linux 7.2
Advanced 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 Enterprise Linux Server AUS (v. 7.2) - noarch, x86_64
Red Hat Enterprise Linux Server Optional AUS (v. 7.2) - 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 via PI futex state (CVE-2021-3347)
* kernel: out-of-bounds write in xt_compat_target_from_user() in
net/netfilter/x_tables.c (CVE-2021-22555)
* kernel: race condition for removal of the HCI controller (CVE-2021-32399)
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):
* [CKI kernel builds]: x86 binaries in non-x86 kernel rpms breaks systemtap
[7.9.z] (BZ#1975163)
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/):
1922249 - CVE-2021-3347 kernel: Use after free via PI futex state
1970807 - CVE-2021-32399 kernel: race condition for removal of the HCI controller
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 Server AUS (v. 7.2):
Source:
kernel-3.10.0-327.100.1.el7.src.rpm
noarch:
kernel-abi-whitelists-3.10.0-327.100.1.el7.noarch.rpm
kernel-doc-3.10.0-327.100.1.el7.noarch.rpm
x86_64:
kernel-3.10.0-327.100.1.el7.x86_64.rpm
kernel-debug-3.10.0-327.100.1.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-327.100.1.el7.x86_64.rpm
kernel-debug-devel-3.10.0-327.100.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-327.100.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-327.100.1.el7.x86_64.rpm
kernel-devel-3.10.0-327.100.1.el7.x86_64.rpm
kernel-headers-3.10.0-327.100.1.el7.x86_64.rpm
kernel-tools-3.10.0-327.100.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-327.100.1.el7.x86_64.rpm
kernel-tools-libs-3.10.0-327.100.1.el7.x86_64.rpm
perf-3.10.0-327.100.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-327.100.1.el7.x86_64.rpm
python-perf-3.10.0-327.100.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-327.100.1.el7.x86_64.rpm
Red Hat Enterprise Linux Server Optional AUS (v. 7.2):
x86_64:
kernel-debug-debuginfo-3.10.0-327.100.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-327.100.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-327.100.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-327.100.1.el7.x86_64.rpm
kernel-tools-libs-devel-3.10.0-327.100.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-327.100.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-327.100.1.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-2021-3347
https://access.redhat.com/security/cve/CVE-2021-22555
https://access.redhat.com/security/cve/CVE-2021-32399
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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