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OpenAdvisories
High 1 exploited CVE RHSA-2026:39082 8 CVEs

Red Hat Security Advisory: kernel-rt security update

Published Jul 14, 2026 · Updated Oct 17, 2026

Ecosystem: Red Hat

Fixed packages 28

ReleasePackageFixed in
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt 0:4.18.0-553.143.1.rt7.484.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-core 0:4.18.0-553.143.1.rt7.484.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debug 0:4.18.0-553.143.1.rt7.484.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debug-core 0:4.18.0-553.143.1.rt7.484.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debug-debuginfo 0:4.18.0-553.143.1.rt7.484.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debug-devel 0:4.18.0-553.143.1.rt7.484.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debug-kvm 0:4.18.0-553.143.1.rt7.484.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debug-modules 0:4.18.0-553.143.1.rt7.484.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debug-modules-extra 0:4.18.0-553.143.1.rt7.484.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debuginfo 0:4.18.0-553.143.1.rt7.484.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debuginfo-common-x86_64 0:4.18.0-553.143.1.rt7.484.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-devel 0:4.18.0-553.143.1.rt7.484.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-kvm 0:4.18.0-553.143.1.rt7.484.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-modules 0:4.18.0-553.143.1.rt7.484.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-modules-extra 0:4.18.0-553.143.1.rt7.484.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt 0:4.18.0-553.143.1.rt7.484.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-core 0:4.18.0-553.143.1.rt7.484.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debug 0:4.18.0-553.143.1.rt7.484.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debug-core 0:4.18.0-553.143.1.rt7.484.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debug-debuginfo 0:4.18.0-553.143.1.rt7.484.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debug-devel 0:4.18.0-553.143.1.rt7.484.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debug-modules 0:4.18.0-553.143.1.rt7.484.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debug-modules-extra 0:4.18.0-553.143.1.rt7.484.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debuginfo 0:4.18.0-553.143.1.rt7.484.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debuginfo-common-x86_64 0:4.18.0-553.143.1.rt7.484.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-devel 0:4.18.0-553.143.1.rt7.484.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-modules 0:4.18.0-553.143.1.rt7.484.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-modules-extra 0:4.18.0-553.143.1.rt7.484.el8_10

Vulnerabilities 8

  • High 8.8
    CVE-2026-53266 Exploited Public exploit

    netfilter: bridge: make ebt_snat ARP rewrite writable

    In the Linux kernel, the following vulnerability has been resolved: netfilter: bridge: make ebt_snat ARP rewrite writable The ebtables SNAT target keeps the Ethernet source address rewrite behind skb_ensure_writable(skb, 0). This is intentional: at the bridge…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
    KEV Sep 18, 2026
  • 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-2025-71066

    net/sched: ets: Always remove class from active list before deleting in ets_qdisc_change

    In the Linux kernel, the following vulnerability has been resolved: net/sched: ets: Always remove class from active list before deleting in ets_qdisc_change zdi-disclosures@trendmicro.com says: The vulnerability is a race condition between `ets_qdisc_dequeue`…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  • High 7.8
    CVE-2025-71089

    iommu: disable SVA when CONFIG_X86 is set

    In the Linux kernel, the following vulnerability has been resolved: iommu: disable SVA when CONFIG_X86 is set Patch series "Fix stale IOTLB entries for kernel address space", v7. This proposes a fix for a security vulnerability related to IOMMU Shared Virtual…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  • 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-2026-31411

    net: atm: fix crash due to unvalidated vcc pointer in sigd_send()

    In the Linux kernel, the following vulnerability has been resolved: net: atm: fix crash due to unvalidated vcc pointer in sigd_send() Reproducer available at [1]. The ATM send path (sendmsg -> vcc_sendmsg -> sigd_send) reads the vcc pointer from msg->vcc and …

    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/#important
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2429036
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2429104
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2456521
  • 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=2485368
  • 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_39082.json
  • report
    https://access.redhat.com/security/cve/CVE-2025-71066
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2025-71066
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2025-71066
  • article
    https://lore.kernel.org/linux-cve-announce/2026011323-CVE-2025-71066-f1fa@gregkh/T
  • report
    https://access.redhat.com/security/cve/CVE-2025-71089
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2025-71089
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2025-71089
  • article
    https://lore.kernel.org/linux-cve-announce/2026011341-CVE-2025-71089-a642@gregkh/T
  • report
    https://access.redhat.com/security/cve/CVE-2026-31411
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-31411
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-31411
  • article
    https://lore.kernel.org/linux-cve-announce/2026040820-CVE-2026-31411-7ef9@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-2026-53266
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-53266
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-53266
  • article
    https://lore.kernel.org/linux-cve-announce/2026062517-CVE-2026-53266-6162@gregkh/T/#u