RHSA-2026:34094HighCVSS 7.8

Red Hat Security Advisory: kernel security, bug fix, and enhancement update

Published
July 1, 2026
Last Modified
August 18, 2026

🔗 CVE IDs covered (18)

CVE-2026-43501 →CVE-2026-45852 →CVE-2026-46173 →CVE-2026-46244 →CVE-2026-31669 →CVE-2026-43329 →CVE-2026-46227 →CVE-2025-21648 →CVE-2026-23191 →CVE-2026-43125 →CVE-2026-46176 →CVE-2026-43128 →CVE-2026-43198 →CVE-2026-43414 →CVE-2026-46090 →CVE-2026-46181 →CVE-2025-21691 →CVE-2026-43027 →

📋 Description

CVE-2025-21648 — kernel: netfilter: conntrack: clamp maximum hashtable size to INT_MAX CVE-2025-21691 — kernel: cachestat: fix page cache statistics permission checking CVE-2026-23191 — kernel: ALSA: aloop: Fix racy access at PCM trigger CVE-2026-31669 — kernel: mptcp: fix slab-use-after-free in __inet_lookup_established CVE-2026-43027 — kernel: netfilter: nf_conntrack_helper: pass helper to expect cleanup CVE-2026-43125 — kernel: dlm: validate length in dlm_search_rsb_tree CVE-2026-43128 — kernel: RDMA/umem: Fix double dma_buf_unpin in failure path CVE-2026-43198 — kernel: tcp: fix potential race in tcp_v6_syn_recv_sock() CVE-2026-43329 — kernel: netfilter: flowtable: strictly check for maximum number of actions CVE-2026-43414 — kernel: scsi: qla2xxx: Completely fix fcport double free CVE-2026-43501 — kernel: ipv6: rpl: reserve mac_len headroom when recompressed SRH grows CVE-2026-45852 — kernel: RDMA/rxe: Fix double free in rxe_srq_from_init CVE-2026-46090 — kernel: ALSA: aloop: Fix peer runtime UAF during format-change stop CVE-2026-46173 — kernel: exit: prevent preemption of oopsing TASK_DEAD task CVE-2026-46176 — kernel: RDMA/mlx5: Fix error path fall-through in mlx5_ib_dev_res_srq_init() CVE-2026-46181 — kernel: RDMA/mlx4: Fix mis-use of RCU in mlx4_srq_event() CVE-2026-46227 — kernel: sctp: revalidate list cursor after sctp_sendmsg_to_asoc() in SCTP_SENDALL CVE-2026-46244 — kernel: netfilter: nft_inner: Fix IPv6 inner_thoff desync

🎯 Affected products200

  • Red Hat CodeReady Linux Builder EUS (v.9.6)
  • Red Hat Enterprise Linux AppStream EUS (v.9.6)
  • Red Hat Enterprise Linux BaseOS EUS (v.9.6)
  • Red Hat Enterprise Linux Real Time EUS (v.9.6)
  • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.6)
  • kernel-0:5.14.0-570.125.1.el9_6.aarch64 as a component of Red Hat Enterprise Linux BaseOS EUS (v.9.6)
  • kernel-0:5.14.0-570.125.1.el9_6.ppc64le as a component of Red Hat Enterprise Linux BaseOS EUS (v.9.6)
  • kernel-0:5.14.0-570.125.1.el9_6.s390x as a component of Red Hat Enterprise Linux BaseOS EUS (v.9.6)
  • kernel-0:5.14.0-570.125.1.el9_6.src as a component of Red Hat Enterprise Linux BaseOS EUS (v.9.6)
  • kernel-0:5.14.0-570.125.1.el9_6.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS (v.9.6)
  • kernel-64k-0:5.14.0-570.125.1.el9_6.aarch64 as a component of Red Hat Enterprise Linux BaseOS EUS (v.9.6)
  • kernel-64k-core-0:5.14.0-570.125.1.el9_6.aarch64 as a component of Red Hat Enterprise Linux BaseOS EUS (v.9.6)
  • kernel-64k-debug-0:5.14.0-570.125.1.el9_6.aarch64 as a component of Red Hat Enterprise Linux BaseOS EUS (v.9.6)
  • kernel-64k-debug-core-0:5.14.0-570.125.1.el9_6.aarch64 as a component of Red Hat Enterprise Linux BaseOS EUS (v.9.6)
  • kernel-64k-debug-debuginfo-0:5.14.0-570.125.1.el9_6.aarch64 as a component of Red Hat CodeReady Linux Builder EUS (v.9.6)
  • kernel-64k-debug-debuginfo-0:5.14.0-570.125.1.el9_6.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6)
  • kernel-64k-debug-debuginfo-0:5.14.0-570.125.1.el9_6.aarch64 as a component of Red Hat Enterprise Linux BaseOS EUS (v.9.6)
  • kernel-64k-debug-debuginfo-0:5.14.0-570.125.1.el9_6.aarch64 as a component of Red Hat Enterprise Linux Real Time EUS (v.9.6)
  • kernel-64k-debug-devel-0:5.14.0-570.125.1.el9_6.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6)
  • kernel-64k-debug-devel-matched-0:5.14.0-570.125.1.el9_6.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6)
  • kernel-64k-debug-modules-0:5.14.0-570.125.1.el9_6.aarch64 as a component of Red Hat Enterprise Linux BaseOS EUS (v.9.6)
  • kernel-64k-debug-modules-core-0:5.14.0-570.125.1.el9_6.aarch64 as a component of Red Hat Enterprise Linux BaseOS EUS (v.9.6)
  • kernel-64k-debug-modules-extra-0:5.14.0-570.125.1.el9_6.aarch64 as a component of Red Hat Enterprise Linux BaseOS EUS (v.9.6)
  • kernel-64k-debuginfo-0:5.14.0-570.125.1.el9_6.aarch64 as a component of Red Hat CodeReady Linux Builder EUS (v.9.6)
  • kernel-64k-debuginfo-0:5.14.0-570.125.1.el9_6.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6)
  • kernel-64k-debuginfo-0:5.14.0-570.125.1.el9_6.aarch64 as a component of Red Hat Enterprise Linux BaseOS EUS (v.9.6)
  • kernel-64k-debuginfo-0:5.14.0-570.125.1.el9_6.aarch64 as a component of Red Hat Enterprise Linux Real Time EUS (v.9.6)
  • kernel-64k-devel-0:5.14.0-570.125.1.el9_6.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6)
  • kernel-64k-devel-matched-0:5.14.0-570.125.1.el9_6.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.6)
  • kernel-64k-modules-0:5.14.0-570.125.1.el9_6.aarch64 as a component of Red Hat Enterprise Linux BaseOS EUS (v.9.6)
  • +170 more not shown

✅ Remediation

For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect. Workaround: Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability. Workaround: To mitigate this issue, disable IPv6 Source Routing by setting the `accept_source_route` sysctl parameter to 0 for all IPv6 interfaces. This can prevent the kernel from processing IPv6 Source Routing Headers, thereby avoiding the vulnerable code path. To disable IPv6 Source Routing: `sysctl -w net.ipv6.conf.all.accept_source_route=0` `sysctl -w net.ipv6.conf.default.accept_source_route=0` To make this change persistent across reboots, add the following lines to `/etc/sysctl.d/99-disable-ipv6-srh.conf`: `net.ipv6.conf.all.accept_source_route = 0` `net.ipv6.conf.default.accept_source_route = 0` Then, apply the changes with: `sysctl --system` Disabling IPv6 Source Routing may impact network configurations that rely on this feature. Workaround: To mitigate this issue, prevent module sctp from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.

🔗 References (21)