Skip to content
OpenAdvisories
High RHSA-2026:39983 5 CVEs

Red Hat Security Advisory: kernel-rt security update

Published Jul 16, 2026 · Updated Oct 14, 2026

Ecosystem: Red Hat

Fixed packages 32

ReleasePackageFixed in
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::nfv kernel-rt 0:5.14.0-284.181.1.rt14.466.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::nfv kernel-rt-core 0:5.14.0-284.181.1.rt14.466.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::nfv kernel-rt-debug 0:5.14.0-284.181.1.rt14.466.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::nfv kernel-rt-debug-core 0:5.14.0-284.181.1.rt14.466.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::nfv kernel-rt-debug-debuginfo 0:5.14.0-284.181.1.rt14.466.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::nfv kernel-rt-debug-devel 0:5.14.0-284.181.1.rt14.466.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::nfv kernel-rt-debug-kvm 0:5.14.0-284.181.1.rt14.466.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::nfv kernel-rt-debug-modules 0:5.14.0-284.181.1.rt14.466.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::nfv kernel-rt-debug-modules-core 0:5.14.0-284.181.1.rt14.466.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::nfv kernel-rt-debug-modules-extra 0:5.14.0-284.181.1.rt14.466.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::nfv kernel-rt-debuginfo 0:5.14.0-284.181.1.rt14.466.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::nfv kernel-rt-debuginfo-common-x86_64 0:5.14.0-284.181.1.rt14.466.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::nfv kernel-rt-devel 0:5.14.0-284.181.1.rt14.466.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::nfv kernel-rt-kvm 0:5.14.0-284.181.1.rt14.466.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::nfv kernel-rt-modules 0:5.14.0-284.181.1.rt14.466.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::nfv kernel-rt-modules-core 0:5.14.0-284.181.1.rt14.466.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::nfv kernel-rt-modules-extra 0:5.14.0-284.181.1.rt14.466.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::realtime kernel-rt 0:5.14.0-284.181.1.rt14.466.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::realtime kernel-rt-core 0:5.14.0-284.181.1.rt14.466.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::realtime kernel-rt-debug 0:5.14.0-284.181.1.rt14.466.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::realtime kernel-rt-debug-core 0:5.14.0-284.181.1.rt14.466.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::realtime kernel-rt-debug-debuginfo 0:5.14.0-284.181.1.rt14.466.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::realtime kernel-rt-debug-devel 0:5.14.0-284.181.1.rt14.466.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::realtime kernel-rt-debug-modules 0:5.14.0-284.181.1.rt14.466.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::realtime kernel-rt-debug-modules-core 0:5.14.0-284.181.1.rt14.466.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::realtime kernel-rt-debug-modules-extra 0:5.14.0-284.181.1.rt14.466.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::realtime kernel-rt-debuginfo 0:5.14.0-284.181.1.rt14.466.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::realtime kernel-rt-debuginfo-common-x86_64 0:5.14.0-284.181.1.rt14.466.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::realtime kernel-rt-devel 0:5.14.0-284.181.1.rt14.466.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::realtime kernel-rt-modules 0:5.14.0-284.181.1.rt14.466.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::realtime kernel-rt-modules-core 0:5.14.0-284.181.1.rt14.466.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::realtime kernel-rt-modules-extra 0:5.14.0-284.181.1.rt14.466.el9_2

Vulnerabilities 5

  • High 8.8
    CVE-2026-46113

    KVM: x86: Fix shadow paging use-after-free due to unexpected GFN

    In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Fix shadow paging use-after-free due to unexpected GFN The shadow MMU computes GFNs for direct shadow pages using sp->gfn plus the SPTE index. This assumption breaks for shadow pagi…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  • High 8.8
    CVE-2026-53359 Public exploit

    KVM: x86: Fix shadow paging use-after-free due to unexpected role

    In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Fix shadow paging use-after-free due to unexpected role Commit 0cb2af2ea66ad ("KVM: x86: Fix shadow paging use-after-free due to unexpected GFN") fixed a shadow paging mismatch betw…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  • High 7.8
    CVE-2026-43499 Public exploit

    rtmutex: Use waiter::task instead of current in remove_waiter()

    In the Linux kernel, the following vulnerability has been resolved: rtmutex: Use waiter::task instead of current in remove_waiter() remove_waiter() is used by the slowlock paths, but it is also used for proxy-lock rollback in rt_mutex_start_proxy_lock() when …

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  • Unscored —
    CVE-2026-43027

    netfilter: nf_conntrack_helper: pass helper to expect cleanup

    In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_conntrack_helper: pass helper to expect cleanup nf_conntrack_helper_unregister() calls nf_ct_expect_iterate_destroy() to remove expectations belonging to the helper being unregi…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  • Unscored —
    CVE-2026-53166 Rejected

    This CVE ID has been rejected or withdrawn by its CVE Numbering Authority.

    linux-raspi2 linux-hwe linux-azure linux-riscv Ubuntu

References

  • article
    https://access.redhat.com/security/updates/classification/#moderate
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2464369
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2480453
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2482587
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2492805
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2497033
  • advisory
    https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_39983.json
  • report
    https://access.redhat.com/security/cve/CVE-2026-43027
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-43027
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-43027
  • article
    https://lore.kernel.org/linux-cve-announce/2026050159-CVE-2026-43027-5711@gregkh/T
  • report
    https://access.redhat.com/security/cve/CVE-2026-43499
  • article
    https://access.redhat.com/security/vulnerabilities/RHSB-2026-010
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-43499
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-43499
  • article
    https://lore.kernel.org/linux-cve-announce/2026052158-CVE-2026-43499-1294@gregkh/T
  • report
    https://access.redhat.com/security/cve/CVE-2026-46113
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-46113
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-46113
  • article
    https://lore.kernel.org/linux-cve-announce/2026052813-CVE-2026-46113-f083@gregkh/T
  • report
    https://access.redhat.com/security/cve/CVE-2026-53166
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-53166
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-53166
  • article
    https://lore.kernel.org/linux-cve-announce/2026062551-CVE-2026-53166-2861@gregkh/T
  • report
    https://access.redhat.com/security/cve/CVE-2026-53359
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-53359
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-53359
  • article
    https://lore.kernel.org/linux-cve-announce/2026070403-CVE-2026-53359-4f57@gregkh/T
  • article
    https://www.openwall.com/lists/oss-security/2026/07/06/7