RHSA-2025:14985MediumCVSS 7.3

Red Hat Security Advisory: kernel security update

Published
September 2, 2025
Last Modified
July 30, 2026

🔗 CVE IDs covered (4)

CVE-2025-21759 →CVE-2025-38085 →CVE-2025-38250 →CVE-2025-38464 →

📋 Description

CVE-2025-21759 — kernel: ipv6: mcast: extend RCU protection in igmp6_send() CVE-2025-38085 — kernel: mm/hugetlb: fix huge_pmd_unshare() vs GUP-fast race CVE-2025-38250 — kernel: Bluetooth: hci_core: Fix use-after-free in vhci_flush() CVE-2025-38464 — kernel: tipc: Fix use-after-free in tipc_conn_close()

🎯 Affected products74

  • Red Hat Enterprise Linux BaseOS E4S (v.8.8)
  • Red Hat Enterprise Linux BaseOS TUS (v.8.8)
  • bpftool-0:4.18.0-477.108.1.el8_8.ppc64le as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.8)
  • bpftool-0:4.18.0-477.108.1.el8_8.x86_64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.8)
  • bpftool-0:4.18.0-477.108.1.el8_8.x86_64 as a component of Red Hat Enterprise Linux BaseOS TUS (v.8.8)
  • bpftool-debuginfo-0:4.18.0-477.108.1.el8_8.ppc64le as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.8)
  • bpftool-debuginfo-0:4.18.0-477.108.1.el8_8.x86_64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.8)
  • bpftool-debuginfo-0:4.18.0-477.108.1.el8_8.x86_64 as a component of Red Hat Enterprise Linux BaseOS TUS (v.8.8)
  • kernel-0:4.18.0-477.108.1.el8_8.ppc64le as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.8)
  • kernel-0:4.18.0-477.108.1.el8_8.src as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.8)
  • kernel-0:4.18.0-477.108.1.el8_8.src as a component of Red Hat Enterprise Linux BaseOS TUS (v.8.8)
  • kernel-0:4.18.0-477.108.1.el8_8.x86_64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.8)
  • kernel-0:4.18.0-477.108.1.el8_8.x86_64 as a component of Red Hat Enterprise Linux BaseOS TUS (v.8.8)
  • kernel-abi-stablelists-0:4.18.0-477.108.1.el8_8.noarch as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.8)
  • kernel-abi-stablelists-0:4.18.0-477.108.1.el8_8.noarch as a component of Red Hat Enterprise Linux BaseOS TUS (v.8.8)
  • kernel-core-0:4.18.0-477.108.1.el8_8.ppc64le as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.8)
  • kernel-core-0:4.18.0-477.108.1.el8_8.x86_64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.8)
  • kernel-core-0:4.18.0-477.108.1.el8_8.x86_64 as a component of Red Hat Enterprise Linux BaseOS TUS (v.8.8)
  • kernel-debug-0:4.18.0-477.108.1.el8_8.ppc64le as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.8)
  • kernel-debug-0:4.18.0-477.108.1.el8_8.x86_64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.8)
  • kernel-debug-0:4.18.0-477.108.1.el8_8.x86_64 as a component of Red Hat Enterprise Linux BaseOS TUS (v.8.8)
  • kernel-debug-core-0:4.18.0-477.108.1.el8_8.ppc64le as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.8)
  • kernel-debug-core-0:4.18.0-477.108.1.el8_8.x86_64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.8)
  • kernel-debug-core-0:4.18.0-477.108.1.el8_8.x86_64 as a component of Red Hat Enterprise Linux BaseOS TUS (v.8.8)
  • kernel-debug-debuginfo-0:4.18.0-477.108.1.el8_8.ppc64le as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.8)
  • kernel-debug-debuginfo-0:4.18.0-477.108.1.el8_8.x86_64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.8)
  • kernel-debug-debuginfo-0:4.18.0-477.108.1.el8_8.x86_64 as a component of Red Hat Enterprise Linux BaseOS TUS (v.8.8)
  • kernel-debug-devel-0:4.18.0-477.108.1.el8_8.ppc64le as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.8)
  • kernel-debug-devel-0:4.18.0-477.108.1.el8_8.x86_64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.8)
  • kernel-debug-devel-0:4.18.0-477.108.1.el8_8.x86_64 as a component of Red Hat Enterprise Linux BaseOS TUS (v.8.8)
  • +44 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 these vulnerabilities on the operating system level, disable the Bluetooth functionality via blocklisting kernel modules in the Linux kernel. The kernel modules can be prevented from being loaded by using system-wide modprobe rules. Instructions on how to disable Bluetooth modules are available on the customer portal at https://access.redhat.com/solutions/2682931. Alternatively, bluetooth can be disabled within the hardware or at the BIOS level, which will also provide effective mitigation as the kernel will not detect Bluetooth hardware on the system. Workaround: To mitigate this issue, prevent module tipc 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 (7)