RHSA-2021:3088: Security update for 12 packages

RHSA-2021:3088, released August 10, 2021, fixes 3 CVEs across 12 products. One of them is being exploited (CVE-2021-22555); 1 on CISA KEV. Patch Radar priority: Patch now.

Patch now1 on CISA KEV

CVEs closed

None rated Critical

Exploited

CVE-2021-22555

Highest CVSS

7.8

Base score, 0 to 10

Highest EPSS

0.7868

99th percentile

Priority of the 3 CVEs

Patch now 1
                                Urgent 0
                                High 2
                                Routine 0

Fixed package versions

Product	Release	Fixed in
kernel-rt	RHEL 8	0:4.18.0-305.12.1.rt7.84.el8_4
kernel-rt-core	RHEL 8	0:4.18.0-305.12.1.rt7.84.el8_4
kernel-rt-debug	RHEL 8	0:4.18.0-305.12.1.rt7.84.el8_4
kernel-rt-debug-core	RHEL 8	0:4.18.0-305.12.1.rt7.84.el8_4
kernel-rt-debug-devel	RHEL 8	0:4.18.0-305.12.1.rt7.84.el8_4
kernel-rt-debug-kvm	RHEL 8	0:4.18.0-305.12.1.rt7.84.el8_4
kernel-rt-debug-modules	RHEL 8	0:4.18.0-305.12.1.rt7.84.el8_4
kernel-rt-debug-modules-extra	RHEL 8	0:4.18.0-305.12.1.rt7.84.el8_4
kernel-rt-devel	RHEL 8	0:4.18.0-305.12.1.rt7.84.el8_4
kernel-rt-kvm	RHEL 8	0:4.18.0-305.12.1.rt7.84.el8_4
kernel-rt-modules	RHEL 8	0:4.18.0-305.12.1.rt7.84.el8_4
kernel-rt-modules-extra	RHEL 8	0:4.18.0-305.12.1.rt7.84.el8_4

CVEs this fix closes

Priority	CVE	Title	CVSS	EPSS	Exploitation
Patch now	CVE-2021-22555	bpftool: The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * kernel: r...	7.8	0.7868	KEVExploited
High	CVE-2021-22543	kpatch-patch-4_18_0-305_3_1: This is a kernel live patch module which is automatically loaded by the RPM post-install script to modify the code of...	7.8	0.0066	None reported
High	CVE-2021-3609	bpftool: The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * kernel: r...	7.0	0.0043	None reported

Also fixes CVE-2021-22555

ELSA-2021-3057
bpftool, kernel, kernel-abi-stablelists and 17 more on ol 8
RHSA-2021:3044
kpatch-patch-4_18_0-305, kpatch-patch-4_18_0-305_10_2, kpatch-patch-4_18_0-305_3_1 and 1 more on RHEL 8
RHSA-2021:3057
bpftool, kernel, kernel-abi-stablelists and 20 more on RHEL 8

Vendor advisory

https://access.redhat.com/errata/RHSA-2021:3088

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