Skip to content
OpenAdvisories
Critical RHSA-2026:0443 3 CVEs

Red Hat Security Advisory: kernel-rt security update

Published Jan 14, 2026 · Updated Nov 13, 2026

Ecosystem: Red Hat

Fixed packages 28

ReleasePackageFixed in
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt 0:4.18.0-553.92.1.rt7.433.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-core 0:4.18.0-553.92.1.rt7.433.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debug 0:4.18.0-553.92.1.rt7.433.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debug-core 0:4.18.0-553.92.1.rt7.433.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debug-debuginfo 0:4.18.0-553.92.1.rt7.433.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debug-devel 0:4.18.0-553.92.1.rt7.433.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debug-kvm 0:4.18.0-553.92.1.rt7.433.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debug-modules 0:4.18.0-553.92.1.rt7.433.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debug-modules-extra 0:4.18.0-553.92.1.rt7.433.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debuginfo 0:4.18.0-553.92.1.rt7.433.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debuginfo-common-x86_64 0:4.18.0-553.92.1.rt7.433.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-devel 0:4.18.0-553.92.1.rt7.433.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-kvm 0:4.18.0-553.92.1.rt7.433.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-modules 0:4.18.0-553.92.1.rt7.433.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-modules-extra 0:4.18.0-553.92.1.rt7.433.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt 0:4.18.0-553.92.1.rt7.433.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-core 0:4.18.0-553.92.1.rt7.433.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debug 0:4.18.0-553.92.1.rt7.433.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debug-core 0:4.18.0-553.92.1.rt7.433.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debug-debuginfo 0:4.18.0-553.92.1.rt7.433.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debug-devel 0:4.18.0-553.92.1.rt7.433.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debug-modules 0:4.18.0-553.92.1.rt7.433.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debug-modules-extra 0:4.18.0-553.92.1.rt7.433.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debuginfo 0:4.18.0-553.92.1.rt7.433.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debuginfo-common-x86_64 0:4.18.0-553.92.1.rt7.433.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-devel 0:4.18.0-553.92.1.rt7.433.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-modules 0:4.18.0-553.92.1.rt7.433.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-modules-extra 0:4.18.0-553.92.1.rt7.433.el8_10

Vulnerabilities 3

  • Critical 9.8
    CVE-2025-68285

    libceph: fix potential use-after-free in have_mon_and_osd_map()

    In the Linux kernel, the following vulnerability has been resolved: libceph: fix potential use-after-free in have_mon_and_osd_map() The wait loop in __ceph_open_session() can race with the client receiving a new monmap or osdmap shortly after the initial map …

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  • High 7.8
    CVE-2025-39993

    media: rc: fix races with imon_disconnect()

    In the Linux kernel, the following vulnerability has been resolved: media: rc: fix races with imon_disconnect() Syzbot reports a KASAN issue as below: BUG: KASAN: use-after-free in __create_pipe include/linux/usb.h:1945 [inline] BUG: KASAN: use-after-free in …

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  • High 7.5
    CVE-2025-40240

    sctp: avoid NULL dereference when chunk data buffer is missing

    In the Linux kernel, the following vulnerability has been resolved: sctp: avoid NULL dereference when chunk data buffer is missing chunk->skb pointer is dereferenced in the if-block where it's supposed to be NULL only. chunk->skb can only be NULL if chunk->he…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux

References

  • article
    https://access.redhat.com/security/updates/classification/#important
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2404121
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2418832
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2422801
  • advisory
    https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_0443.json
  • report
    https://access.redhat.com/security/cve/CVE-2025-39993
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2025-39993
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2025-39993
  • article
    https://lore.kernel.org/linux-cve-announce/2025101527-CVE-2025-39993-caef@gregkh/T
  • report
    https://access.redhat.com/security/cve/CVE-2025-40240
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2025-40240
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2025-40240
  • article
    https://kernelcve.org/list/?q=CVE-2025-40240
  • article
    https://lore.kernel.org/linux-cve-announce/2025120403-CVE-2025-40240-745a@gregkh/T
  • report
    https://access.redhat.com/security/cve/CVE-2025-68285
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2025-68285
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2025-68285
  • article
    https://lore.kernel.org/linux-cve-announce/2025121638-CVE-2025-68285-8339@gregkh/T