RHSA-2025:14692HighCVSS 7.3

Red Hat Security Advisory: kernel security update

Published
August 27, 2025
Last Modified
November 2, 2026

🔗 CVE IDs covered (9)

CVE-2025-38250 →CVE-2022-49977 →CVE-2025-38001 →CVE-2025-38079 →CVE-2025-38350 →CVE-2021-47670 →CVE-2025-37890 →CVE-2025-38000 →CVE-2025-38177 →

📋 Description

CVE-2021-47670 — kernel: can: peak_usb: fix use after free bugs CVE-2022-49977 — kernel: ftrace: Fix NULL pointer dereference in is_ftrace_trampoline when ftrace is dead CVE-2025-37890 — kernel: net_sched: hfsc: Fix a UAF vulnerability in class with netem as child qdisc CVE-2025-38000 — kernel: sch_hfsc: Fix qlen accounting bug when using peek in hfsc_enqueue() CVE-2025-38001 — kernel: net_sched: hfsc: Address reentrant enqueue adding class to eltree twice CVE-2025-38079 — kernel: crypto: algif_hash - fix double free in hash_accept CVE-2025-38177 — kernel: sch_hfsc: make hfsc_qlen_notify() idempotent CVE-2025-38250 — kernel: Bluetooth: hci_core: Fix use-after-free in vhci_flush() CVE-2025-38350 — kernel: net/sched: Always pass notifications when child class becomes empty

🎯 Affected products149

  • Red Hat Enterprise Linux BaseOS AUS (v.8.6)
  • Red Hat Enterprise Linux BaseOS E4S (v.8.6)
  • Red Hat Enterprise Linux BaseOS TUS (v.8.6)
  • bpftool-0:4.18.0-372.158.1.el8_6.aarch64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.6)
  • bpftool-0:4.18.0-372.158.1.el8_6.ppc64le as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.6)
  • bpftool-0:4.18.0-372.158.1.el8_6.s390x as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.6)
  • bpftool-0:4.18.0-372.158.1.el8_6.x86_64 as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.6)
  • bpftool-0:4.18.0-372.158.1.el8_6.x86_64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.6)
  • bpftool-0:4.18.0-372.158.1.el8_6.x86_64 as a component of Red Hat Enterprise Linux BaseOS TUS (v.8.6)
  • bpftool-debuginfo-0:4.18.0-372.158.1.el8_6.aarch64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.6)
  • bpftool-debuginfo-0:4.18.0-372.158.1.el8_6.ppc64le as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.6)
  • bpftool-debuginfo-0:4.18.0-372.158.1.el8_6.s390x as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.6)
  • bpftool-debuginfo-0:4.18.0-372.158.1.el8_6.x86_64 as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.6)
  • bpftool-debuginfo-0:4.18.0-372.158.1.el8_6.x86_64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.6)
  • bpftool-debuginfo-0:4.18.0-372.158.1.el8_6.x86_64 as a component of Red Hat Enterprise Linux BaseOS TUS (v.8.6)
  • kernel-0:4.18.0-372.158.1.el8_6.aarch64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.6)
  • kernel-0:4.18.0-372.158.1.el8_6.ppc64le as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.6)
  • kernel-0:4.18.0-372.158.1.el8_6.s390x as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.6)
  • kernel-0:4.18.0-372.158.1.el8_6.src as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.6)
  • kernel-0:4.18.0-372.158.1.el8_6.src as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.6)
  • kernel-0:4.18.0-372.158.1.el8_6.src as a component of Red Hat Enterprise Linux BaseOS TUS (v.8.6)
  • kernel-0:4.18.0-372.158.1.el8_6.x86_64 as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.6)
  • kernel-0:4.18.0-372.158.1.el8_6.x86_64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.6)
  • kernel-0:4.18.0-372.158.1.el8_6.x86_64 as a component of Red Hat Enterprise Linux BaseOS TUS (v.8.6)
  • kernel-abi-stablelists-0:4.18.0-372.158.1.el8_6.noarch as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.6)
  • kernel-abi-stablelists-0:4.18.0-372.158.1.el8_6.noarch as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.6)
  • kernel-abi-stablelists-0:4.18.0-372.158.1.el8_6.noarch as a component of Red Hat Enterprise Linux BaseOS TUS (v.8.6)
  • kernel-core-0:4.18.0-372.158.1.el8_6.aarch64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.6)
  • kernel-core-0:4.18.0-372.158.1.el8_6.ppc64le as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.6)
  • kernel-core-0:4.18.0-372.158.1.el8_6.s390x as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.6)
  • +119 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 sch_hfsc 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 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 the sch_cbs module from being loaded. Please see https://access.redhat.com/solutions/41278 for how information on how to blacklist a kernel module to prevent it from loading automatically.

🔗 References (12)