ALSA-2026:21557: Security update for 75 packages

ALSA-2026:21557, released May 28, 2026, fixes 18 CVEs across 75 products. None of them is reported as exploited. Patch Radar priority: High.

High

CVEs closed

None rated Critical

Exploited

None reported

Highest CVSS

9.4

Base score, 0 to 10

Highest EPSS

0.0159

75th percentile

Priority of the 18 CVEs

Patch now 0
                                Urgent 0
                                High 18
                                Routine 0

Fixed package versions

Product	Release	Fixed in
kernel	almalinux 10	6.12.0-211.18.1.el10_2
kernel-64k	almalinux 10	6.12.0-211.18.1.el10_2
kernel-64k-core	almalinux 10	6.12.0-211.18.1.el10_2
kernel-64k-debug	almalinux 10	6.12.0-211.18.1.el10_2
kernel-64k-debug-core	almalinux 10	6.12.0-211.18.1.el10_2
kernel-64k-debug-devel	almalinux 10	6.12.0-211.18.1.el10_2
kernel-64k-debug-devel-matched	almalinux 10	6.12.0-211.18.1.el10_2
kernel-64k-debug-modules	almalinux 10	6.12.0-211.18.1.el10_2
kernel-64k-debug-modules-core	almalinux 10	6.12.0-211.18.1.el10_2
kernel-64k-debug-modules-extra	almalinux 10	6.12.0-211.18.1.el10_2
kernel-64k-devel	almalinux 10	6.12.0-211.18.1.el10_2
kernel-64k-devel-matched	almalinux 10	6.12.0-211.18.1.el10_2
kernel-64k-modules	almalinux 10	6.12.0-211.18.1.el10_2
kernel-64k-modules-core	almalinux 10	6.12.0-211.18.1.el10_2
kernel-64k-modules-extra	almalinux 10	6.12.0-211.18.1.el10_2
kernel-abi-stablelists	almalinux 10	6.12.0-211.18.1.el10_2
kernel-core	almalinux 10	6.12.0-211.18.1.el10_2
kernel-cross-headers	almalinux 10	6.12.0-211.18.1.el10_2
kernel-debug	almalinux 10	6.12.0-211.18.1.el10_2
kernel-debug-core	almalinux 10	6.12.0-211.18.1.el10_2
kernel-debug-devel	almalinux 10	6.12.0-211.18.1.el10_2
kernel-debug-devel-matched	almalinux 10	6.12.0-211.18.1.el10_2
kernel-debug-modules	almalinux 10	6.12.0-211.18.1.el10_2
kernel-debug-modules-core	almalinux 10	6.12.0-211.18.1.el10_2
kernel-debug-modules-extra	almalinux 10	6.12.0-211.18.1.el10_2
kernel-debug-uki-virt	almalinux 10	6.12.0-211.18.1.el10_2
kernel-devel	almalinux 10	6.12.0-211.18.1.el10_2
kernel-devel-matched	almalinux 10	6.12.0-211.18.1.el10_2
kernel-doc	almalinux 10	6.12.0-211.18.1.el10_2
kernel-headers	almalinux 10	6.12.0-211.18.1.el10_2
kernel-modules	almalinux 10	6.12.0-211.18.1.el10_2
kernel-modules-core	almalinux 10	6.12.0-211.18.1.el10_2
kernel-modules-extra	almalinux 10	6.12.0-211.18.1.el10_2
kernel-modules-extra-matched	almalinux 10	6.12.0-211.18.1.el10_2
kernel-rt	almalinux 10	6.12.0-211.18.1.el10_2
kernel-rt-64k	almalinux 10	6.12.0-211.18.1.el10_2
kernel-rt-64k-core	almalinux 10	6.12.0-211.18.1.el10_2
kernel-rt-64k-debug	almalinux 10	6.12.0-211.18.1.el10_2
kernel-rt-64k-debug-core	almalinux 10	6.12.0-211.18.1.el10_2
kernel-rt-64k-debug-devel	almalinux 10	6.12.0-211.18.1.el10_2
kernel-rt-64k-debug-modules	almalinux 10	6.12.0-211.18.1.el10_2
kernel-rt-64k-debug-modules-core	almalinux 10	6.12.0-211.18.1.el10_2
kernel-rt-64k-debug-modules-extra	almalinux 10	6.12.0-211.18.1.el10_2
kernel-rt-64k-devel	almalinux 10	6.12.0-211.18.1.el10_2
kernel-rt-64k-modules	almalinux 10	6.12.0-211.18.1.el10_2
kernel-rt-64k-modules-core	almalinux 10	6.12.0-211.18.1.el10_2
kernel-rt-64k-modules-extra	almalinux 10	6.12.0-211.18.1.el10_2
kernel-rt-core	almalinux 10	6.12.0-211.18.1.el10_2
kernel-rt-debug	almalinux 10	6.12.0-211.18.1.el10_2
kernel-rt-debug-core	almalinux 10	6.12.0-211.18.1.el10_2
kernel-rt-debug-devel	almalinux 10	6.12.0-211.18.1.el10_2
kernel-rt-debug-modules	almalinux 10	6.12.0-211.18.1.el10_2
kernel-rt-debug-modules-core	almalinux 10	6.12.0-211.18.1.el10_2
kernel-rt-debug-modules-extra	almalinux 10	6.12.0-211.18.1.el10_2
kernel-rt-devel	almalinux 10	6.12.0-211.18.1.el10_2
kernel-rt-modules	almalinux 10	6.12.0-211.18.1.el10_2
kernel-rt-modules-core	almalinux 10	6.12.0-211.18.1.el10_2
kernel-rt-modules-extra	almalinux 10	6.12.0-211.18.1.el10_2
kernel-tools	almalinux 10	6.12.0-211.18.1.el10_2
kernel-tools-libs	almalinux 10	6.12.0-211.18.1.el10_2
kernel-tools-libs-devel	almalinux 10	6.12.0-211.18.1.el10_2
kernel-uki-virt	almalinux 10	6.12.0-211.18.1.el10_2
kernel-uki-virt-addons	almalinux 10	6.12.0-211.18.1.el10_2
kernel-zfcpdump	almalinux 10	6.12.0-211.18.1.el10_2
kernel-zfcpdump-core	almalinux 10	6.12.0-211.18.1.el10_2
kernel-zfcpdump-devel	almalinux 10	6.12.0-211.18.1.el10_2
kernel-zfcpdump-devel-matched	almalinux 10	6.12.0-211.18.1.el10_2
kernel-zfcpdump-modules	almalinux 10	6.12.0-211.18.1.el10_2
kernel-zfcpdump-modules-core	almalinux 10	6.12.0-211.18.1.el10_2
kernel-zfcpdump-modules-extra	almalinux 10	6.12.0-211.18.1.el10_2
libperf	almalinux 10	6.12.0-211.18.1.el10_2
perf	almalinux 10	6.12.0-211.18.1.el10_2
python3-perf	almalinux 10	6.12.0-211.18.1.el10_2
rtla	almalinux 10	6.12.0-211.18.1.el10_2
rv	almalinux 10	6.12.0-211.18.1.el10_2

CVEs this fix closes

Priority	CVE	Title	CVSS	EPSS	Exploitation
High	CVE-2026-23455	kernel: In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_conntrack_h323: check for zero leng...	9.1	0.0159	None reported
High	CVE-2024-56645	kernel: The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * kernel: c...	7.8	0.0068	None reported
High	CVE-2026-31685	netfilter: ip6t_eui64: reject invalid MAC header for all packets	9.4	0.0049	None reported
High	CVE-2026-43158	linux: In the Linux kernel, the following vulnerability has been resolved: xfs: fix freemap adjustments when adding xattrs...	8.8	0.0047	None reported
High	CVE-2026-43190	kernel: In the Linux kernel, the following vulnerability has been resolved: netfilter: xt_tcpmss: check remaining length befo...	8.2	0.0046	None reported
High	CVE-2026-43110	linux: In the Linux kernel, the following vulnerability has been resolved: wifi: brcmfmac: validate bsscfg indices in IF ev...	8.8	0.0027	None reported
High	CVE-2026-43051	linux: In the Linux kernel, the following vulnerability has been resolved: HID: wacom: fix out-of-bounds read in wacom_intu...	8.1	0.0026	None reported
High	CVE-2026-43303	mm/page_alloc: clear page->private in free_pages_prepare()	7.8	0.0017	None reported
High	CVE-2026-23392	netfilter: nf_tables: release flowtable after rcu grace period on error	8.8	0.0017	None reported
High	CVE-2025-68183	linux: In the Linux kernel, the following vulnerability has been resolved: ima: don't clear IMA_DIGSIG flag when setting or...	7.8	0.0015	None reported
High	CVE-2026-43205	linux: In the Linux kernel, the following vulnerability has been resolved: dpaa2-switch: validate num_ifs to prevent out-of...	7.8	0.0014	None reported
High	CVE-2026-43027	linux: In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_conntrack_helper: pass helper to e...	7.8	0.0013	None reported
High	CVE-2026-43020	linux: In the Linux kernel, the following vulnerability has been resolved: Bluetooth: MGMT: validate LTK enc_size on load...	7.8	0.0013	None reported
High	CVE-2026-43006	linux: In the Linux kernel, the following vulnerability has been resolved: io_uring/rsrc: reject zero-length fixed buffer i...	7.5	0.0012	None reported
High	CVE-2026-23375	kernel: In the Linux kernel, the following vulnerability has been resolved: mm: thp: deny THP for files on anonymous inodes f...	7.5	0.0012	None reported
High	CVE-2026-31684	net: sched: act_csum: validate nested VLAN headers	7.8	0.0012	None reported
High	CVE-2026-43116	netfilter: ctnetlink: ensure safe access to master conntrack	8.8	0.0010	None reported
High	CVE-2026-43023	kernel: In the Linux kernel, the following vulnerability has been resolved: Bluetooth: SCO: fix race conditions in sco_sock_c...	7.8	0.0010	None reported

Also fixes CVE-2026-23455

SUSE-SU-2026:2238-1
kernel-64kb, kernel-azure, kernel-default and 7 more on sles 15.7
ELSA-2026-50372
kernel-uek, kernel-uek-core, kernel-uek-debug and 32 more on ol 10, ol 9
ALAS2023-2026-1681
bpftool, bpftool-debuginfo, kernel and 19 more on amzn 2023
ALAS2023-2026-1596
bpftool6.18, bpftool6.18-debuginfo, kernel-livepatch-6.18.20-20.229 and 19 more on amzn 2023
ALAS2023-2026-1594
bpftool6.12, bpftool6.12-debuginfo, kernel-livepatch-6.12.79-101.147 and 19 more on amzn 2023
ELSA-2026-21556
kernel, kernel-abi-stablelists, kernel-core and 26 more on ol 9
RHSA-2026:21556
kernel, kernel-64k, kernel-64k-core and 69 more on RHEL 9
ALSA-2026:21556
kernel, kernel-64k, kernel-64k-core and 71 more on almalinux 9

Vendor advisory

https://osv.dev/vulnerability/ALSA-2026:21557

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