RHSA-2026:15883: kernel security update

RHSA-2026:15883, released March 12, 2026, fixes 6 CVEs in kernel (version 6.12.0-55.72.1.el10_0). None of them is reported as exploited. Patch Radar priority: Urgent.

Urgent

CVEs closed

1 rated Critical

Exploited

None reported

Highest CVSS

9.8

Base score, 0 to 10

Highest EPSS

0.0122

68th percentile

Priority of the 6 CVEs

Patch now 0
                                Urgent 1
                                High 5
                                Routine 0

Fixed package versions

Product	Release	Fixed in
kernel	RHEL 10	6.12.0-55.72.1.el10_0

CVEs this fix closes

Priority	CVE	Title	CVSS	EPSS	Exploitation
Urgent	CVE-2026-31402	kernel-default: The SUSE Linux Enterprise 15 SP6 kernel was updated to fix various security issues The following security issues wer...	9.8	0.0122	None reported
High	CVE-2026-23139	linux: In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_conncount: update last_gc only whe...	7.6	0.0038	None reported
High	CVE-2026-23401	KVM: x86/mmu: Drop/zap existing present SPTE even when creating an MMIO SPTE	8.8	0.0019	None reported
High	CVE-2026-23243	RDMA/umad: Reject negative data_len in ib_umad_write	7.8	0.0018	None reported
High	CVE-2026-31532	can: raw: fix ro->uniq use-after-free in raw_rcv()	8.8	0.0017	None reported
High	CVE-2026-23097	kernel-core: The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * kernel: L...	7.5	0.0011	None reported

Also fixes CVE-2026-31402

RXSA-2026:13577
kernel on rocky 8
RHSA-2026:13577
bpftool, kernel, kernel-abi-stablelists and 20 more on RHEL 8
RHSA-2026:13578
kernel-rt, kernel-rt-core, kernel-rt-debug and 9 more on RHEL 8
ALSA-2026:13577
bpftool, kernel, kernel-abi-stablelists and 22 more on almalinux 8
ALSA-2026:13578
kernel-rt, kernel-rt-core, kernel-rt-debug and 7 more on almalinux 8
RLSA-2026:13578
kernel-rt on rocky 8
ELSA-2026-13577
bpftool, kernel, kernel-abi-stablelists and 17 more on ol 8
ELSA-2026-13565
kernel, kernel-abi-stablelists, kernel-core and 26 more on ol 9

Vendor advisory

https://access.redhat.com/errata/RHSA-2026:15883

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