RHSA-2026:85774: Security update for 12 packages

RHSA-2026:85774, released October 20, 2026, fixes 9 CVEs across 12 products. None of them is reported as exploited. Patch Radar priority: Urgent.

Urgent

CVEs closed

3 rated Critical

Exploited

None reported

Highest CVSS

9.8

Base score, 0 to 10

Highest EPSS

0.0052

44th percentile

Priority of the 9 CVEs

Patch now 0
                                Urgent 3
                                High 6
                                Routine 0

Fixed package versions

Product	Release	Fixed in
kernel-rt	RHEL 8	0:4.18.0-553.176.1.rt7.517.el8_10
kernel-rt-core	RHEL 8	0:4.18.0-553.176.1.rt7.517.el8_10
kernel-rt-debug	RHEL 8	0:4.18.0-553.176.1.rt7.517.el8_10
kernel-rt-debug-core	RHEL 8	0:4.18.0-553.176.1.rt7.517.el8_10
kernel-rt-debug-devel	RHEL 8	0:4.18.0-553.176.1.rt7.517.el8_10
kernel-rt-debug-kvm	RHEL 8	0:4.18.0-553.176.1.rt7.517.el8_10
kernel-rt-debug-modules	RHEL 8	0:4.18.0-553.176.1.rt7.517.el8_10
kernel-rt-debug-modules-extra	RHEL 8	0:4.18.0-553.176.1.rt7.517.el8_10
kernel-rt-devel	RHEL 8	0:4.18.0-553.176.1.rt7.517.el8_10
kernel-rt-kvm	RHEL 8	0:4.18.0-553.176.1.rt7.517.el8_10
kernel-rt-modules	RHEL 8	0:4.18.0-553.176.1.rt7.517.el8_10
kernel-rt-modules-extra	RHEL 8	0:4.18.0-553.176.1.rt7.517.el8_10

CVEs this fix closes

Priority	CVE	Title	CVSS	EPSS	Exploitation
Urgent	CVE-2026-89479	sctp: stop processing a packet once its association is deleted	9.8	0.0050	None reported
Urgent	CVE-2026-89631	smb: client: reject a tree connect response whose byte count is too small	9.1	0.0049	None reported
Urgent	CVE-2026-98320	netfilter: flowtable: hold reference on ct until flow is released	9.8	0.0014	None reported
High	CVE-2026-74752	sctp: validate cookie AUTH state before use	9.8	0.0052	None reported
High	CVE-2026-74588	sctp: keep chunk->transport in step with the list it is queued on	9.8	0.0050	None reported
High	CVE-2026-53196	USB: serial: io_ti: fix heap overflow in get_manuf_info()	8.8	0.0027	None reported
High	CVE-2026-93288	netfilter: nfnetlink_log: wait for rcu grace period before freeing pernet state	8.8	0.0013	None reported
High	CVE-2026-93817	perf: Fix addr_filter_ranges lifetime	8.8	0.0013	None reported
High	CVE-2026-52935	xfrm: espintcp: do not reuse an in-progress partial send	8.8	0.0010	None reported

Also fixes CVE-2026-89479

SUSE-SU-2026:4660-1
kernel-default, kernel-default-base, kernel-docs and 4 more on sles 15.6
SUSE-SU-2026:4640-1
kernel-livepatch-SLE15-SP7-RT_Update_21 on sles 15.7
SUSE-SU-2026:4706-1
kernel-64kb, kernel-azure, kernel-default and 7 more on sles 15.7
OPENSUSE-SU-2026:22091-1
dtb-aarch64, kernel-64kb, kernel-azure and 10 more on opensuse-leap 16.0
SUSE-SU-2026:24197-1
kernel-default on sles 16.0
SUSE-SU-2026:24235-1
kernel-64kb, kernel-azure, kernel-default-base and 6 more on sles 16.0
ELSA-2026-500374
kernel-uek, kernel-uek-core, kernel-uek-debug and 32 more on ol 10, ol 9
ALAS2023-2026-3196
bpftool6.12, bpftool6.12-debuginfo, kernel-livepatch-6.12.110-135.201 and 15 more on amzn 2023

Vendor advisory

https://access.redhat.com/errata/RHSA-2026:85774

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