RHSA-2025:21118MediumCVSS 7.6

Red Hat Security Advisory: kernel security update

Published
November 12, 2025
Last Modified
July 30, 2026

🔗 CVE IDs covered (12)

CVE-2025-39702 →CVE-2025-39727 →CVE-2025-39757 →CVE-2025-39817 →CVE-2025-39841 →CVE-2025-39849 →CVE-2025-39697 →CVE-2025-39718 →CVE-2025-39751 · pendingCVE-2025-39881 →CVE-2025-40300 →CVE-2025-38498 →

📋 Description

CVE-2025-38498 — kernel: do_change_type(): refuse to operate on unmounted/not ours mounts CVE-2025-39697 — kernel: NFS: Fix a race when updating an existing write CVE-2025-39702 — kernel: ipv6: sr: Fix MAC comparison to be constant-time CVE-2025-39718 — kernel: vsock/virtio: Validate length in packet header before skb_put() CVE-2025-39727 — kernel: mm: swap: fix potential buffer overflow in setup_clusters() CVE-2025-39751 — kernel: Linux kernel ALSA hda/ca0132 buffer overflow CVE-2025-39757 — kernel: ALSA: usb-audio: Validate UAC3 cluster segment descriptors CVE-2025-39817 — kernel: efivarfs: Fix slab-out-of-bounds in efivarfs_d_compare CVE-2025-39841 — kernel: scsi: lpfc: Fix buffer free/clear order in deferred receive path CVE-2025-39849 — kernel: wifi: cfg80211: sme: cap SSID length in __cfg80211_connect_result() CVE-2025-39881 — kernel: kernfs: Fix UAF in polling when open file is released CVE-2025-40300 — kernel: x86/vmscape: Add conditional IBPB mitigation

🎯 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-0:6.12.0-124.9.1.el10_1.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • kernel-0:6.12.0-124.9.1.el10_1.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • kernel-0:6.12.0-124.9.1.el10_1.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • kernel-0:6.12.0-124.9.1.el10_1.src as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • kernel-0:6.12.0-124.9.1.el10_1.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • kernel-64k-0:6.12.0-124.9.1.el10_1.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • kernel-64k-core-0:6.12.0-124.9.1.el10_1.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • kernel-64k-debug-0:6.12.0-124.9.1.el10_1.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • kernel-64k-debug-core-0:6.12.0-124.9.1.el10_1.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • kernel-64k-debug-debuginfo-0:6.12.0-124.9.1.el10_1.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • kernel-64k-debug-debuginfo-0:6.12.0-124.9.1.el10_1.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • kernel-64k-debug-debuginfo-0:6.12.0-124.9.1.el10_1.aarch64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)
  • kernel-64k-debug-debuginfo-0:6.12.0-124.9.1.el10_1.aarch64 as a component of Red Hat Enterprise Linux Real Time (v. 10)
  • kernel-64k-debug-devel-0:6.12.0-124.9.1.el10_1.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • kernel-64k-debug-devel-matched-0:6.12.0-124.9.1.el10_1.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • kernel-64k-debug-modules-0:6.12.0-124.9.1.el10_1.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • kernel-64k-debug-modules-core-0:6.12.0-124.9.1.el10_1.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • kernel-64k-debug-modules-extra-0:6.12.0-124.9.1.el10_1.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • kernel-64k-debuginfo-0:6.12.0-124.9.1.el10_1.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • kernel-64k-debuginfo-0:6.12.0-124.9.1.el10_1.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10)
  • kernel-64k-debuginfo-0:6.12.0-124.9.1.el10_1.aarch64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)
  • kernel-64k-debuginfo-0:6.12.0-124.9.1.el10_1.aarch64 as a component of Red Hat Enterprise Linux Real Time (v. 10)
  • kernel-64k-devel-0:6.12.0-124.9.1.el10_1.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • kernel-64k-devel-matched-0:6.12.0-124.9.1.el10_1.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
  • kernel-64k-modules-0:6.12.0-124.9.1.el10_1.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: 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 nfs 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 vmw_vsock_virtio_transport 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 cfg80211 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 IBPB each time the kernel returns to QEMU.

🔗 References (15)