Linux · 
Rocky Linux · Security advisory · May 30, 2026
Rocky Linux · Security advisory · May 30, 2026RLSA-2026:21556: kernel security update
RLSA-2026:21556, released May 30, 2026, fixes 19 CVEs in kernel (version 0:5.14.0-687.12.1.el9_8). None of them is reported as exploited. Patch Radar priority: High.
High
CVEs closed
19
None rated Critical
Exploited
0
None reported
Highest CVSS
9.4
Base score, 0 to 10
Highest EPSS
0.0159
75th percentile
Priority of the 19 CVEs
Patch now 0
Urgent 0
High 19
Routine 0
Fixed package versions
| Product | Release | Fixed in |
|---|---|---|
| kernel | rocky 9 | 0:5.14.0-687.12.1.el9_8 |
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-2026-31685 | netfilter: ip6t_eui64: reject invalid MAC header for all packets | 9.4 | 0.0049 | None reported |
| High | CVE-2026-43158 | kernel-64kb: xfs: fix freemap adjustments when adding xattrs to leaf blocks (bsc#1264595). | 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-2026-31709 | smb: client: validate the whole DACL before rewriting it in cifsacl | 8.8 | 0.0035 | None reported |
| High | CVE-2026-31408 | Bluetooth: SCO: Fix use-after-free in sco_recv_frame() due to missing sock_hold | 8.8 | 0.0032 | None reported |
| High | CVE-2026-43110 | kernel-default: wifi: brcmfmac: validate bsscfg indices in IF events (bsc#1264482). | 8.8 | 0.0027 | None reported |
| High | CVE-2026-43051 | kernel-64kb: Security update for the Linux Kernel | 8.1 | 0.0026 | None reported |
| High | CVE-2025-68366 | kernel-64kb: nbd: defer config unlock in nbd_genl_connect (bsc#1255622). | 8.8 | 0.0020 | None reported |
| High | CVE-2025-38653 | proc: use the same treatment to check proc_lseek as ones for proc_read_iter et.al | 7.8 | 0.0018 | 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-2025-71089 | iommu: disable SVA when CONFIG_X86 is set | 7.8 | 0.0016 | 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-2025-68724 | linux: In the Linux kernel, the following vulnerability has been resolved: crypto: asymmetric_keys - prevent overflow in as... | 8.1 | 0.0014 | None reported |
| High | CVE-2026-43027 | kernel-default: netfilter: nf_conntrack_helper: pass helper to expect cleanup (bsc#1263933). | 7.8 | 0.0013 | None reported |
| High | CVE-2026-43020 | kernel-64kb: Security update for the Linux Kernel | 7.8 | 0.0013 | None reported |
| High | CVE-2026-31684 | net: sched: act_csum: validate nested VLAN headers | 7.8 | 0.0012 | None reported |
| High | CVE-2026-43023 | kernel-default: Bluetooth: SCO: fix race conditions in sco_sock_connect() (bsc#1264137). | 7.8 | 0.0010 | None reported |
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