RHSA-2026:27713 — Security Advisory

An update for kernel is now available for Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

The kernel packages contain the Linux kernel, the core of any Linux operating system.

Security Fix(es):

• kernel: netfilter: nf_conntrack_h323: check for zero length in DecodeQ931() (CVE-2026-23455)

• kernel: mptcp: fix slab-use-after-free in __inet_lookup_established (CVE-2026-31669)

• kernel: RDMA/umem: Fix double dma_buf_unpin in failure path (CVE-2026-43128)

• kernel: netfilter: flowtable: strictly check for maximum number of actions (CVE-2026-43329)

• kernel: net/sched: act_pedit: extend the writable skb range per key (CVE-2026-46331)

• kernel: ipv6: rpl: reserve mac_len headroom when recompressed SRH grows (CVE-2026-43501)

• kernel: RDMA/rxe: Fix double free in rxe_srq_from_init (CVE-2026-45852)

• kernel: exit: prevent preemption of oopsing TASK_DEAD task (CVE-2026-46173)

Bug Fix(es) and Enhancement(s):

• [rhel-9] WARNING: possible recursive locking detected - vmd_enable_domain+0x757/0x910 [rhel-9.4.z] (JIRA:RHEL-174468)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.