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OpenAdvisories
High RHSA-2026:1148 4 CVEs

Red Hat Security Advisory: kernel-rt security update

Published Jan 26, 2026 · Updated Nov 13, 2026

Ecosystem: Red Hat

Fixed packages 28

ReleasePackageFixed in
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt 0:4.18.0-553.97.1.rt7.438.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-core 0:4.18.0-553.97.1.rt7.438.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debug 0:4.18.0-553.97.1.rt7.438.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debug-core 0:4.18.0-553.97.1.rt7.438.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debug-debuginfo 0:4.18.0-553.97.1.rt7.438.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debug-devel 0:4.18.0-553.97.1.rt7.438.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debug-kvm 0:4.18.0-553.97.1.rt7.438.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debug-modules 0:4.18.0-553.97.1.rt7.438.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debug-modules-extra 0:4.18.0-553.97.1.rt7.438.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debuginfo 0:4.18.0-553.97.1.rt7.438.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debuginfo-common-x86_64 0:4.18.0-553.97.1.rt7.438.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-devel 0:4.18.0-553.97.1.rt7.438.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-kvm 0:4.18.0-553.97.1.rt7.438.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-modules 0:4.18.0-553.97.1.rt7.438.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-modules-extra 0:4.18.0-553.97.1.rt7.438.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt 0:4.18.0-553.97.1.rt7.438.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-core 0:4.18.0-553.97.1.rt7.438.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debug 0:4.18.0-553.97.1.rt7.438.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debug-core 0:4.18.0-553.97.1.rt7.438.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debug-debuginfo 0:4.18.0-553.97.1.rt7.438.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debug-devel 0:4.18.0-553.97.1.rt7.438.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debug-modules 0:4.18.0-553.97.1.rt7.438.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debug-modules-extra 0:4.18.0-553.97.1.rt7.438.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debuginfo 0:4.18.0-553.97.1.rt7.438.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debuginfo-common-x86_64 0:4.18.0-553.97.1.rt7.438.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-devel 0:4.18.0-553.97.1.rt7.438.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-modules 0:4.18.0-553.97.1.rt7.438.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-modules-extra 0:4.18.0-553.97.1.rt7.438.el8_10

Vulnerabilities 4

  • High 8.8
    CVE-2023-53673

    Bluetooth: hci_event: call disconnect callback before deleting conn

    In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_event: call disconnect callback before deleting conn In hci_cs_disconnect, we do hci_conn_del even if disconnection failed. ISO, L2CAP and SCO connections refer to the hci_conn…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  • High 7.8
    CVE-2025-40248

    vsock: Ignore signal/timeout on connect() if already established

    In the Linux kernel, the following vulnerability has been resolved: vsock: Ignore signal/timeout on connect() if already established During connect(), acting on a signal/timeout by disconnecting an already established socket leads to several issues: 1. connec…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  • High 7.8
    CVE-2025-40277

    drm/vmwgfx: Validate command header size against SVGA_CMD_MAX_DATASIZE

    In the Linux kernel, the following vulnerability has been resolved: drm/vmwgfx: Validate command header size against SVGA_CMD_MAX_DATASIZE This data originates from userspace and is used in buffer offset calculations which could potentially overflow causing a…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  • Unscored —
    CVE-2025-40154

    ASoC: Intel: bytcr_rt5640: Fix invalid quirk input mapping

    In the Linux kernel, the following vulnerability has been resolved: ASoC: Intel: bytcr_rt5640: Fix invalid quirk input mapping When an invalid value is passed via quirk option, currently bytcr_rt5640 driver only shows an error message but leaves as is. This m…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu

References

  • article
    https://access.redhat.com/security/updates/classification/#important
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2402193
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2414494
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2418872
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2419954
  • advisory
    https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_1148.json
  • report
    https://access.redhat.com/security/cve/CVE-2023-53673
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2023-53673
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2023-53673
  • article
    https://lore.kernel.org/linux-cve-announce/2025100706-CVE-2023-53673-36b9@gregkh/T
  • report
    https://access.redhat.com/security/cve/CVE-2025-40154
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2025-40154
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2025-40154
  • article
    https://lore.kernel.org/linux-cve-announce/2025111258-CVE-2025-40154-fd98@gregkh/T
  • report
    https://access.redhat.com/security/cve/CVE-2025-40248
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2025-40248
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2025-40248
  • article
    https://lore.kernel.org/linux-cve-announce/2025120430-CVE-2025-40248-506e@gregkh/T
  • report
    https://access.redhat.com/security/cve/CVE-2025-40277
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2025-40277
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2025-40277
  • article
    https://lore.kernel.org/linux-cve-announce/2025120717-CVE-2025-40277-d511@gregkh/T