RHSA-2026:21557HighCVSS 7.5

Red Hat Security Advisory: kernel security update

Published
May 28, 2026
Last Modified
July 31, 2026

🔗 CVE IDs covered (18)

CVE-2026-43006 →CVE-2026-43303 →CVE-2026-43116 →CVE-2025-68183 →CVE-2026-23375 →CVE-2026-43051 →CVE-2026-43110 →CVE-2026-43158 →CVE-2026-43190 →CVE-2026-31685 →CVE-2026-43027 →CVE-2026-43205 →CVE-2026-23455 →CVE-2026-31684 →CVE-2026-43020 →CVE-2026-43023 →CVE-2024-56645 →CVE-2026-23392 →

📋 Description

CVE-2024-56645 — kernel: can: j1939: j1939_session_new(): fix skb reference counting CVE-2025-68183 — kernel: ima: don't clear IMA_DIGSIG flag when setting or removing non-IMA xattr CVE-2026-23375 — kernel: mm: thp: deny THP for files on anonymous inodes CVE-2026-23392 — kernel: netfilter: nf_tables: release flowtable after rcu grace period on error CVE-2026-23455 — kernel: netfilter: nf_conntrack_h323: check for zero length in DecodeQ931() CVE-2026-31684 — kernel: net: sched: act_csum: validate nested VLAN headers CVE-2026-31685 — kernel: netfilter: ip6t_eui64: reject invalid MAC header for all packets CVE-2026-43006 — kernel: io_uring/rsrc: reject zero-length fixed buffer import CVE-2026-43020 — kernel: Bluetooth: MGMT: validate LTK enc_size on load CVE-2026-43023 — kernel: Bluetooth: SCO: fix race conditions in sco_sock_connect() CVE-2026-43027 — kernel: netfilter: nf_conntrack_helper: pass helper to expect cleanup CVE-2026-43051 — kernel: HID: wacom: fix out-of-bounds read in wacom_intuos_bt_irq CVE-2026-43110 — kernel: wifi: brcmfmac: validate bsscfg indices in IF events CVE-2026-43116 — kernel: netfilter: ctnetlink: ensure safe access to master conntrack CVE-2026-43158 — kernel: xfs: fix freemap adjustments when adding xattrs to leaf blocks CVE-2026-43190 — kernel: netfilter: xt_tcpmss: check remaining length before reading optlen CVE-2026-43205 — kernel: Linux kernel dpaa2-switch: Kernel memory corruption via out-of-bounds write CVE-2026-43303 — kernel: mm/page_alloc: clear page->private in free_pages_prepare()

🎯 Affected products200

  • Red Hat Enterprise Linux AppStream (v. 10)
  • Red Hat Enterprise Linux BaseOS (v. 10)
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)
  • Red Hat Enterprise Linux Real Time (v. 10)
  • Red Hat Enterprise Linux Real Time for NFV (v. 10)
  • kernel-0:6.12.0-211.18.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • kernel-0:6.12.0-211.18.1.el10_2.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • kernel-0:6.12.0-211.18.1.el10_2.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • kernel-0:6.12.0-211.18.1.el10_2.src as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • kernel-0:6.12.0-211.18.1.el10_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • kernel-64k-0:6.12.0-211.18.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • kernel-64k-core-0:6.12.0-211.18.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • kernel-64k-debug-0:6.12.0-211.18.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • kernel-64k-debug-core-0:6.12.0-211.18.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • kernel-64k-debug-debuginfo-0:6.12.0-211.18.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • kernel-64k-debug-debuginfo-0:6.12.0-211.18.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • kernel-64k-debug-debuginfo-0:6.12.0-211.18.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)
  • kernel-64k-debug-debuginfo-0:6.12.0-211.18.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux Real Time (v. 10)
  • kernel-64k-debug-devel-0:6.12.0-211.18.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • kernel-64k-debug-devel-matched-0:6.12.0-211.18.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • kernel-64k-debug-modules-0:6.12.0-211.18.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • kernel-64k-debug-modules-core-0:6.12.0-211.18.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • kernel-64k-debug-modules-extra-0:6.12.0-211.18.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • kernel-64k-debuginfo-0:6.12.0-211.18.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • kernel-64k-debuginfo-0:6.12.0-211.18.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • kernel-64k-debuginfo-0:6.12.0-211.18.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)
  • kernel-64k-debuginfo-0:6.12.0-211.18.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux Real Time (v. 10)
  • kernel-64k-devel-0:6.12.0-211.18.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • kernel-64k-devel-matched-0:6.12.0-211.18.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • kernel-64k-modules-0:6.12.0-211.18.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • +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: To mitigate this issue, prevent module brcmfmac from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically. Workaround: Mitigation for this issue is to skip loading the affected module "netfilter" onto the system till we have a fix available, this can be done by a blacklist mechanism, this will ensure the driver is not loaded at the boot time. ~~~ How do I blacklist a kernel module to prevent it from loading automatically? https://access.redhat.com/solutions/41278 ~~~ 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, prevent module fsl-dpaa2-eth 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)