Red Hat Security Advisory

RHSA-2026:36645

kernel update

Released 2026-07-08 · Red Hat rating Important · View on Red Hat →

Fixed in

Red Hat Enterprise Linux AppStream (v. 9) kernel-64k-debug-devel-5.14.0-687.23.1.el9_8, kernel-64k-debug-devel-matched-5.14.0-687.23.1.el9_8, kernel-64k-devel-5.14.0-687.23.1.el9_8 +12
Red Hat Enterprise Linux BaseOS (v. 9) kernel-5.14.0-687.23.1.el9_8, kernel-64k-5.14.0-687.23.1.el9_8, kernel-64k-core-5.14.0-687.23.1.el9_8 +28
Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) kernel-tools-libs-devel-5.14.0-687.23.1.el9_8, libperf-5.14.0-687.23.1.el9_8
Red Hat Enterprise Linux Real Time (v. 9) kernel-rt-5.14.0-687.23.1.el9_8, kernel-rt-64k-5.14.0-687.23.1.el9_8, kernel-rt-64k-core-5.14.0-687.23.1.el9_8 +21
Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt-5.14.0-687.23.1.el9_8, kernel-rt-core-5.14.0-687.23.1.el9_8, kernel-rt-debug-5.14.0-687.23.1.el9_8 +9

Fixes 3 records

TI-2026-38352 CVE-2026-53266 · GHSA-xmhg-rr34-2chj

netfilter: bridge: make ebt_snat ARP rewrite writable

CRITICAL 97KEV

In the Linux kernel, the following vulnerability has been resolved: netfilter: bridge: make ebt_snat ARP rewrite writable The ebtables SNAT target keeps the Ethernet source address rewrite behind skb_ensure_writable(skb,…

CVSS 3.1HIGH 8.8 Local Low privileges No interaction EPSS 0.00934 Published 2026-06-25 Fixed in 5.5, 5.9 +9 CWE-787

TI-2026-33963 CVE-2026-46242 · GHSA-h4r8-4j67-99mx

eventpoll: fix ep_remove struct eventpoll / struct file UAF

MEDIUM 43

In the Linux kernel, the following vulnerability has been resolved: eventpoll: fix ep_remove struct eventpoll / struct file UAF ep_remove() (via ep_remove_file()) cleared file->f_ep under file->f_lock but then kept using…

CVSS 3.1HIGH 7.8 Local Low privileges No interaction EPSS 0.04576 Published 2026-05-30 Partial fix · 5.15.222, 6.1.178 +5 CWE-416

TI-2026-31254 CVE-2026-43074 · GHSA-4j6h-qqh4-vpw7

eventpoll: defer struct eventpoll free to RCU grace period

LOW 37

In the Linux kernel, the following vulnerability has been resolved: eventpoll: defer struct eventpoll free to RCU grace period In certain situations, ep_free() in eventpoll.c will kfree the epi->ep eventpoll struct while…

CVSS 3.1HIGH 7.8 Local Low privileges No interaction EPSS 0.00482 Published 2026-05-06 Fixed in 6.6.136, 6.12.83 +3 CWE-416