Red Hat Security Advisory

RHSA-2026:9515

kernel security update

Released 2026-04-22 · Red Hat rating Moderate · View on Red Hat →

Fixed in

Red Hat Enterprise Linux BaseOS E4S (v.8.8) bpftool-4.18.0-477.136.1.el8_8, kernel-4.18.0-477.136.1.el8_8, kernel-abi-stablelists-4.18.0-477.136.1.el8_8 +14
Red Hat Enterprise Linux BaseOS TUS (v.8.8) bpftool-4.18.0-477.136.1.el8_8, kernel-4.18.0-477.136.1.el8_8, kernel-abi-stablelists-4.18.0-477.136.1.el8_8 +14

Fixes 2 records

TI-2026-18668 CVE-2026-23231 · GHSA-gxm6-px42-mpjc

netfilter: nf_tables: fix use-after-free in nf_tables_addchain()

LOW 38

In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: fix use-after-free in nf_tables_addchain() nf_tables_addchain() publishes the chain to table->chains via list_add_tail_rcu() (in n…

CVSS 3.1HIGH 7.8 Local Low privileges No interaction EPSS 0.01045 Published 2026-03-04 Partial fix · 6.1.165, 6.6.128 +4 CWE-416

TI-2026-18641 CVE-2026-23204 · GHSA-rf63-9f5h-hhg6

net/sched: cls_u32: use skb_header_pointer_careful()

LOW 30

In the Linux kernel, the following vulnerability has been resolved: net/sched: cls_u32: use skb_header_pointer_careful() skb_header_pointer() does not fully validate negative @offset values.

CVSS 3.1HIGH 7.1 Local Low privileges No interaction EPSS 0.00152 Published 2026-02-14 Partial fix · 5.10.260, 5.15.209 +5 CWE-125