Red Hat Security Advisory

RHSA-2026:6036

kernel-rt security update

Released 2026-03-30 · Red Hat rating Moderate · View on Red Hat →

Fixed in

Red Hat Enterprise Linux NFV (v. 8) kernel-rt-4.18.0-553.115.1.rt7.456.el8_10, kernel-rt-core-4.18.0-553.115.1.rt7.456.el8_10, kernel-rt-debug-4.18.0-553.115.1.rt7.456.el8_10 +9
Red Hat Enterprise Linux RT (v. 8) kernel-rt-4.18.0-553.115.1.rt7.456.el8_10, kernel-rt-core-4.18.0-553.115.1.rt7.456.el8_10, kernel-rt-debug-4.18.0-553.115.1.rt7.456.el8_10 +7

Fixes 3 records

TI-2026-18646 CVE-2026-23209 · GHSA-89j4-f3cq-gm32

macvlan: fix error recovery in macvlan_common_newlink()

LOW 35

In the Linux kernel, the following vulnerability has been resolved: macvlan: fix error recovery in macvlan_common_newlink() valis provided a nice repro to crash the kernel: ip link add p1 type veth peer p2 ip link set ad…

CVSS 3.1HIGH 7.8 Local Low privileges No interaction EPSS 0.00176 Published 2026-02-14 Partial fix · 5.10.250, 5.15.200 +5 CWE-416

TI-2025-25520 CVE-2025-38180 · GHSA-qp5r-frvf-p8mw

net: atm: fix /proc/net/atm/lec handling

LOW 35

In the Linux kernel, the following vulnerability has been resolved: net: atm: fix /proc/net/atm/lec handling /proc/net/atm/lec must ensure safety against dev_lec[] changes.

CVSS 3.1HIGH 7.8 Local Low privileges No interaction EPSS 0.0021 Published 2025-07-04 Partial fix · 5.4.295, 5.10.239 +6 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