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OpenAdvisories
High RHSA-2026:87374 7 CVEs

Red Hat Security Advisory: kernel-rt security update

Published Nov 13, 2026 · Updated Nov 13, 2026

Ecosystem: Red Hat

Fixed packages 28

ReleasePackageFixed in
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt 0:4.18.0-553.177.1.rt7.518.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-core 0:4.18.0-553.177.1.rt7.518.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debug 0:4.18.0-553.177.1.rt7.518.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debug-core 0:4.18.0-553.177.1.rt7.518.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debug-debuginfo 0:4.18.0-553.177.1.rt7.518.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debug-devel 0:4.18.0-553.177.1.rt7.518.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debug-kvm 0:4.18.0-553.177.1.rt7.518.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debug-modules 0:4.18.0-553.177.1.rt7.518.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debug-modules-extra 0:4.18.0-553.177.1.rt7.518.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debuginfo 0:4.18.0-553.177.1.rt7.518.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debuginfo-common-x86_64 0:4.18.0-553.177.1.rt7.518.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-devel 0:4.18.0-553.177.1.rt7.518.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-kvm 0:4.18.0-553.177.1.rt7.518.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-modules 0:4.18.0-553.177.1.rt7.518.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-modules-extra 0:4.18.0-553.177.1.rt7.518.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt 0:4.18.0-553.177.1.rt7.518.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-core 0:4.18.0-553.177.1.rt7.518.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debug 0:4.18.0-553.177.1.rt7.518.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debug-core 0:4.18.0-553.177.1.rt7.518.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debug-debuginfo 0:4.18.0-553.177.1.rt7.518.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debug-devel 0:4.18.0-553.177.1.rt7.518.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debug-modules 0:4.18.0-553.177.1.rt7.518.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debug-modules-extra 0:4.18.0-553.177.1.rt7.518.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debuginfo 0:4.18.0-553.177.1.rt7.518.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debuginfo-common-x86_64 0:4.18.0-553.177.1.rt7.518.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-devel 0:4.18.0-553.177.1.rt7.518.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-modules 0:4.18.0-553.177.1.rt7.518.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-modules-extra 0:4.18.0-553.177.1.rt7.518.el8_10

Vulnerabilities 7

  • High 8.8
    CVE-2026-89777

    vfio/pci: clear vdev->msi_perm after freeing it on init failure

    In the Linux kernel, the following vulnerability has been resolved: vfio/pci: clear vdev->msi_perm after freeing it on init failure vfio_msi_cap_len() lazily allocates the per-device MSI permission table: vdev->msi_perm = kmalloc_obj(struct perm_bits, GFP_KER…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  • High 8.6
    CVE-2026-80590

    inet: frags: strip GSO state from fragments before reassembly

    In the Linux kernel, the following vulnerability has been resolved: inet: frags: strip GSO state from fragments before reassembly A virtio_net_hdr (tun/tap, or AF_PACKET with PACKET_VNET_HDR) can mark an IPv4 or IPv6 fragment as GSO; nothing relates gso_type …

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  • High 8.4
    CVE-2026-80536

    xfs: bounds-check buffer log item's dirty bitmap

    In the Linux kernel, the following vulnerability has been resolved: xfs: bounds-check buffer log item's dirty bitmap xlog_recover_do_reg_buffer() replays each dirty region described by a buffer log item's bitmap into the buffer read for that item: memcpy(xfs_…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  • High 7.8
    CVE-2026-64114

    ipv4: raw: reject IP_HDRINCL packets with ihl < 5

    In the Linux kernel, the following vulnerability has been resolved: ipv4: raw: reject IP_HDRINCL packets with ihl < 5 raw_send_hdrinc() validates that the caller-supplied IPv4 header fits within the message length: iphlen = iph->ihl * 4; err = -EINVAL; if (ip…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  • High 7.8
    CVE-2026-64266

    fuse: re-lock request before returning from fuse_ref_folio()

    In the Linux kernel, the following vulnerability has been resolved: fuse: re-lock request before returning from fuse_ref_folio() fuse_ref_folio() unlocks the request but does not re-lock it before returning. fuse_chan_abort() can end the request and the async…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  • High 7.8
    CVE-2026-68202

    ALSA: seq: close a re-opened queue timer in the destructor

    In the Linux kernel, the following vulnerability has been resolved: ALSA: seq: close a re-opened queue timer in the destructor queue_delete() closes the queue timer, then frees it. snd_seq_timer_close() clears q->timer->timeri. snd_use_lock_sync() then drains…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  • Unscored —
    CVE-2026-64572

    ipv4: fib: free fib_alias with kfree_rcu() on insert error path

    In the Linux kernel, the following vulnerability has been resolved: ipv4: fib: free fib_alias with kfree_rcu() on insert error path fib_table_insert() publishes new_fa into the leaf's fa_list with fib_insert_alias() before calling the fib entry notifiers. Whe…

    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=2502486
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2507098
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2511413
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2513245
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2524501
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2525413
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2535066
  • advisory
    https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_87374.json
  • report
    https://access.redhat.com/security/cve/CVE-2026-64114
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-64114
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-64114
  • article
    https://kernelcve.org/list/?q=CVE-2026-64114
  • article
    https://lore.kernel.org/linux-cve-announce/2026071923-CVE-2026-64114-d584@gregkh/T
  • report
    https://access.redhat.com/security/cve/CVE-2026-64266
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-64266
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-64266
  • article
    https://kernelcve.org/list/?q=CVE-2026-64266
  • article
    https://lore.kernel.org/linux-cve-announce/2026072558-CVE-2026-64266-67e6@gregkh/T
  • report
    https://access.redhat.com/security/cve/CVE-2026-64572
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-64572
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-64572
  • article
    https://lore.kernel.org/linux-cve-announce/2026080559-CVE-2026-64572-e260@gregkh/T
  • report
    https://access.redhat.com/security/cve/CVE-2026-68202
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-68202
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-68202
  • article
    https://lore.kernel.org/linux-cve-announce/2026081011-CVE-2026-68202-e7fa@gregkh/T
  • report
    https://access.redhat.com/security/cve/CVE-2026-80536
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-80536
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-80536
  • article
    https://lore.kernel.org/linux-cve-announce/2026082604-CVE-2026-80536-5666@gregkh/T
  • report
    https://access.redhat.com/security/cve/CVE-2026-80590
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-80590
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-80590
  • article
    https://lore.kernel.org/linux-cve-announce/2026082816-CVE-2026-80590-241e@gregkh/T
  • report
    https://access.redhat.com/security/cve/CVE-2026-89777
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-89777
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-89777
  • article
    https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89777.mbox