RHSA-2025:21760MediumCVSS 7.8

Red Hat Security Advisory: kernel security update

Published
November 19, 2025
Last Modified
August 4, 2026

🔗 CVE IDs covered (9)

CVE-2025-38729 →CVE-2025-39697 →CVE-2025-39702 →CVE-2025-39817 →CVE-2025-39849 →CVE-2025-38718 →CVE-2025-39757 →CVE-2025-40300 →CVE-2023-53494 →

📋 Description

CVE-2023-53494 — kernel: crypto: xts - Handle EBUSY correctly CVE-2025-38718 — kernel: sctp: linearize cloned gso packets in sctp_rcv CVE-2025-38729 — kernel: ALSA: usb-audio: Validate UAC3 power domain descriptors, too 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-2025-39757 — kernel: ALSA: usb-audio: Validate UAC3 cluster segment descriptors CVE-2025-39817 — kernel: efivarfs: Fix slab-out-of-bounds in efivarfs_d_compare CVE-2025-39849 — kernel: wifi: cfg80211: sme: cap SSID length in __cfg80211_connect_result() CVE-2025-40300 — kernel: x86/vmscape: Add conditional IBPB mitigation

🎯 Affected products200

  • Red Hat CodeReady Linux Builder EUS (v.9.4)
  • Red Hat Enterprise Linux AppStream EUS (v.9.4)
  • Red Hat Enterprise Linux BaseOS EUS (v.9.4)
  • Red Hat Enterprise Linux Real Time EUS (v.9.4)
  • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.4)
  • bpftool-0:7.3.0-427.100.1.el9_4.aarch64 as a component of Red Hat Enterprise Linux BaseOS EUS (v.9.4)
  • bpftool-0:7.3.0-427.100.1.el9_4.ppc64le as a component of Red Hat Enterprise Linux BaseOS EUS (v.9.4)
  • bpftool-0:7.3.0-427.100.1.el9_4.s390x as a component of Red Hat Enterprise Linux BaseOS EUS (v.9.4)
  • bpftool-0:7.3.0-427.100.1.el9_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS (v.9.4)
  • bpftool-debuginfo-0:7.3.0-427.100.1.el9_4.aarch64 as a component of Red Hat CodeReady Linux Builder EUS (v.9.4)
  • bpftool-debuginfo-0:7.3.0-427.100.1.el9_4.aarch64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.4)
  • bpftool-debuginfo-0:7.3.0-427.100.1.el9_4.aarch64 as a component of Red Hat Enterprise Linux BaseOS EUS (v.9.4)
  • bpftool-debuginfo-0:7.3.0-427.100.1.el9_4.ppc64le as a component of Red Hat CodeReady Linux Builder EUS (v.9.4)
  • bpftool-debuginfo-0:7.3.0-427.100.1.el9_4.ppc64le as a component of Red Hat Enterprise Linux AppStream EUS (v.9.4)
  • bpftool-debuginfo-0:7.3.0-427.100.1.el9_4.ppc64le as a component of Red Hat Enterprise Linux BaseOS EUS (v.9.4)
  • bpftool-debuginfo-0:7.3.0-427.100.1.el9_4.s390x as a component of Red Hat CodeReady Linux Builder EUS (v.9.4)
  • bpftool-debuginfo-0:7.3.0-427.100.1.el9_4.s390x as a component of Red Hat Enterprise Linux AppStream EUS (v.9.4)
  • bpftool-debuginfo-0:7.3.0-427.100.1.el9_4.s390x as a component of Red Hat Enterprise Linux BaseOS EUS (v.9.4)
  • bpftool-debuginfo-0:7.3.0-427.100.1.el9_4.x86_64 as a component of Red Hat CodeReady Linux Builder EUS (v.9.4)
  • bpftool-debuginfo-0:7.3.0-427.100.1.el9_4.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS (v.9.4)
  • bpftool-debuginfo-0:7.3.0-427.100.1.el9_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS (v.9.4)
  • bpftool-debuginfo-0:7.3.0-427.100.1.el9_4.x86_64 as a component of Red Hat Enterprise Linux Real Time EUS (v.9.4)
  • bpftool-debuginfo-0:7.3.0-427.100.1.el9_4.x86_64 as a component of Red Hat Enterprise Linux Real Time for NFV EUS (v.9.4)
  • kernel-0:5.14.0-427.100.1.el9_4.aarch64 as a component of Red Hat Enterprise Linux BaseOS EUS (v.9.4)
  • kernel-0:5.14.0-427.100.1.el9_4.ppc64le as a component of Red Hat Enterprise Linux BaseOS EUS (v.9.4)
  • kernel-0:5.14.0-427.100.1.el9_4.s390x as a component of Red Hat Enterprise Linux BaseOS EUS (v.9.4)
  • kernel-0:5.14.0-427.100.1.el9_4.src as a component of Red Hat Enterprise Linux BaseOS EUS (v.9.4)
  • kernel-0:5.14.0-427.100.1.el9_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS (v.9.4)
  • kernel-64k-0:5.14.0-427.100.1.el9_4.aarch64 as a component of Red Hat Enterprise Linux BaseOS EUS (v.9.4)
  • kernel-64k-core-0:5.14.0-427.100.1.el9_4.aarch64 as a component of Red Hat Enterprise Linux BaseOS EUS (v.9.4)
  • +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 xts 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 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: 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 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 (12)