RHSA-2025:16880MediumCVSS 7.5

Red Hat Security Advisory: kernel security update

Published
September 29, 2025
Last Modified
July 30, 2026

🔗 CVE IDs covered (5)

CVE-2025-38718 →CVE-2025-39682 →CVE-2025-39698 →CVE-2025-38472 →CVE-2025-38527 →

📋 Description

CVE-2025-38472 — kernel: netfilter: nf_conntrack: fix crash due to removal of uninitialised entry CVE-2025-38527 — kernel: smb: client: fix use-after-free in cifs_oplock_break CVE-2025-38718 — kernel: sctp: linearize cloned gso packets in sctp_rcv CVE-2025-39682 — kernel: tls: fix handling of zero-length records on the rx_list CVE-2025-39698 — kernel: io_uring/futex: ensure io_futex_wait() cleans up properly on failure

🎯 Affected products200

  • Red Hat Enterprise Linux AppStream (v. 9)
  • Red Hat Enterprise Linux BaseOS (v. 9)
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
  • Red Hat Enterprise Linux Real Time (v. 9)
  • Red Hat Enterprise Linux Real Time for NFV (v. 9)
  • kernel-0:5.14.0-570.49.1.el9_6.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • kernel-0:5.14.0-570.49.1.el9_6.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • kernel-0:5.14.0-570.49.1.el9_6.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • kernel-0:5.14.0-570.49.1.el9_6.src as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • kernel-0:5.14.0-570.49.1.el9_6.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • kernel-64k-0:5.14.0-570.49.1.el9_6.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • kernel-64k-core-0:5.14.0-570.49.1.el9_6.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • kernel-64k-debug-0:5.14.0-570.49.1.el9_6.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • kernel-64k-debug-core-0:5.14.0-570.49.1.el9_6.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • kernel-64k-debug-debuginfo-0:5.14.0-570.49.1.el9_6.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • kernel-64k-debug-debuginfo-0:5.14.0-570.49.1.el9_6.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • kernel-64k-debug-debuginfo-0:5.14.0-570.49.1.el9_6.aarch64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
  • kernel-64k-debug-debuginfo-0:5.14.0-570.49.1.el9_6.aarch64 as a component of Red Hat Enterprise Linux Real Time (v. 9)
  • kernel-64k-debug-devel-0:5.14.0-570.49.1.el9_6.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • kernel-64k-debug-devel-matched-0:5.14.0-570.49.1.el9_6.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • kernel-64k-debug-modules-0:5.14.0-570.49.1.el9_6.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • kernel-64k-debug-modules-core-0:5.14.0-570.49.1.el9_6.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • kernel-64k-debug-modules-extra-0:5.14.0-570.49.1.el9_6.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • kernel-64k-debuginfo-0:5.14.0-570.49.1.el9_6.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • kernel-64k-debuginfo-0:5.14.0-570.49.1.el9_6.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • kernel-64k-debuginfo-0:5.14.0-570.49.1.el9_6.aarch64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
  • kernel-64k-debuginfo-0:5.14.0-570.49.1.el9_6.aarch64 as a component of Red Hat Enterprise Linux Real Time (v. 9)
  • kernel-64k-devel-0:5.14.0-570.49.1.el9_6.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • kernel-64k-devel-matched-0:5.14.0-570.49.1.el9_6.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • kernel-64k-modules-0:5.14.0-570.49.1.el9_6.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 9)
  • +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: In order to trigger the issue, it requires the ability to create user/net namespaces. On non-containerized deployments of Red Hat Enterprise Linux 8, you can disable user namespaces by setting user.max_user_namespaces to 0: # echo "user.max_user_namespaces=0" > /etc/sysctl.d/userns.conf # sysctl -p /etc/sysctl.d/userns.conf On containerized deployments, such as Red Hat OpenShift Container Platform, do not use this mitigation as the functionality is needed to be enabled. If nf_conntrack not being used with netfilter, then disabled it. To mitigate this issue, prevent module nf_conntrack from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically. Also check the solution about Kernel panic in __nf_ct_delete_from_lists for workaround at https://access.redhat.com/solutions/7130481 with broader details. 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. Workaround: To mitigate this issue, prevent module tls 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 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.

🔗 References (8)