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OpenAdvisories
Critical RHSA-2026:36348 6 CVEs

Red Hat Security Advisory: kernel-rt security, bug fix, and enhancement update

Published Jul 8, 2026 · Updated Oct 20, 2026

Ecosystem: Red Hat

Fixed packages 28

ReleasePackageFixed in
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt 0:4.18.0-553.140.1.rt7.481.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-core 0:4.18.0-553.140.1.rt7.481.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debug 0:4.18.0-553.140.1.rt7.481.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debug-core 0:4.18.0-553.140.1.rt7.481.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debug-debuginfo 0:4.18.0-553.140.1.rt7.481.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debug-devel 0:4.18.0-553.140.1.rt7.481.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debug-kvm 0:4.18.0-553.140.1.rt7.481.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debug-modules 0:4.18.0-553.140.1.rt7.481.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debug-modules-extra 0:4.18.0-553.140.1.rt7.481.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debuginfo 0:4.18.0-553.140.1.rt7.481.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debuginfo-common-x86_64 0:4.18.0-553.140.1.rt7.481.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-devel 0:4.18.0-553.140.1.rt7.481.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-kvm 0:4.18.0-553.140.1.rt7.481.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-modules 0:4.18.0-553.140.1.rt7.481.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-modules-extra 0:4.18.0-553.140.1.rt7.481.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt 0:4.18.0-553.140.1.rt7.481.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-core 0:4.18.0-553.140.1.rt7.481.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debug 0:4.18.0-553.140.1.rt7.481.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debug-core 0:4.18.0-553.140.1.rt7.481.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debug-debuginfo 0:4.18.0-553.140.1.rt7.481.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debug-devel 0:4.18.0-553.140.1.rt7.481.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debug-modules 0:4.18.0-553.140.1.rt7.481.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debug-modules-extra 0:4.18.0-553.140.1.rt7.481.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debuginfo 0:4.18.0-553.140.1.rt7.481.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debuginfo-common-x86_64 0:4.18.0-553.140.1.rt7.481.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-devel 0:4.18.0-553.140.1.rt7.481.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-modules 0:4.18.0-553.140.1.rt7.481.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-modules-extra 0:4.18.0-553.140.1.rt7.481.el8_10

Vulnerabilities 6

  • Critical 9.8
    CVE-2026-43198

    tcp: fix potential race in tcp_v6_syn_recv_sock()

    In the Linux kernel, the following vulnerability has been resolved: tcp: fix potential race in tcp_v6_syn_recv_sock() Code in tcp_v6_syn_recv_sock() after the call to tcp_v4_syn_recv_sock() is done too late. After tcp_v4_syn_recv_sock(), the child socket is a…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  • Critical 9.1
    CVE-2025-10263 Public exploit

    Arm C1-Ultra, C1-Premium, Neoverse V3 & V3AE, Neoverse V2, Neoverse V1, Neoverse-N2, Neoverse-N1, Cortex-X925, Cortex-X…

    Arm Cortex-X4 Neoverse V3AE Cortex-X925 Debian Ubuntu Alpine
  • High 7.8
    CVE-2026-46209

    drm/gem: Fix inconsistent plane dimension calculation in drm_gem_fb_init_with_funcs()

    In the Linux kernel, the following vulnerability has been resolved: drm/gem: Fix inconsistent plane dimension calculation in drm_gem_fb_init_with_funcs() drm_gem_fb_init_with_funcs() computes sub-sampled plane dimensions using plain integer division: unsigned…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  • High 7.8
    CVE-2026-46227

    sctp: revalidate list cursor after sctp_sendmsg_to_asoc() in SCTP_SENDALL

    In the Linux kernel, the following vulnerability has been resolved: sctp: revalidate list cursor after sctp_sendmsg_to_asoc() in SCTP_SENDALL The SCTP_SENDALL path in sctp_sendmsg() iterates ep->asocs with list_for_each_entry_safe(), which caches the next ent…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  • High 7.8
    CVE-2026-46259

    procfs: fix missing RCU protection when reading real_parent in do_task_stat()

    In the Linux kernel, the following vulnerability has been resolved: procfs: fix missing RCU protection when reading real_parent in do_task_stat() When reading /proc/[pid]/stat, do_task_stat() accesses task->real_parent without proper RCU protection, which lea…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  • Unscored —
    CVE-2026-43450

    netfilter: nfnetlink_cthelper: fix OOB read in nfnl_cthelper_dump_table()

    In the Linux kernel, the following vulnerability has been resolved: netfilter: nfnetlink_cthelper: fix OOB read in nfnl_cthelper_dump_table() nfnl_cthelper_dump_table() has a 'goto restart' that jumps to a label inside the for loop body. When the "last" helpe…

    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=2467228
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2468228
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2482564
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2482636
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2484477
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2486958
  • advisory
    https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_36348.json
  • report
    https://access.redhat.com/security/cve/CVE-2025-10263
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2025-10263
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2025-10263
  • article
    https://developer.arm.com/documentation/112137
  • report
    https://access.redhat.com/security/cve/CVE-2026-43198
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-43198
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-43198
  • article
    https://lore.kernel.org/linux-cve-announce/2026050645-CVE-2026-43198-0870@gregkh/T
  • report
    https://access.redhat.com/security/cve/CVE-2026-43450
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-43450
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-43450
  • article
    https://lore.kernel.org/linux-cve-announce/2026050857-CVE-2026-43450-8919@gregkh/T
  • report
    https://access.redhat.com/security/cve/CVE-2026-46209
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-46209
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-46209
  • article
    https://lore.kernel.org/linux-cve-announce/2026052834-CVE-2026-46209-e4e9@gregkh/T
  • report
    https://access.redhat.com/security/cve/CVE-2026-46227
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-46227
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-46227
  • article
    https://lore.kernel.org/linux-cve-announce/2026052838-CVE-2026-46227-4bf1@gregkh/T
  • report
    https://access.redhat.com/security/cve/CVE-2026-46259
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-46259
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-46259
  • article
    https://lore.kernel.org/linux-cve-announce/2026060336-CVE-2026-46259-6c94@gregkh/T