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OpenAdvisories
Critical RHSA-2026:64770 7 CVEs

Red Hat Security Advisory: kernel-rt security update

Published Sep 8, 2026 · Updated Nov 13, 2026

Ecosystem: Red Hat

Fixed packages 28

ReleasePackageFixed in
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt 0:4.18.0-553.160.1.rt7.501.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-core 0:4.18.0-553.160.1.rt7.501.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debug 0:4.18.0-553.160.1.rt7.501.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debug-core 0:4.18.0-553.160.1.rt7.501.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debug-debuginfo 0:4.18.0-553.160.1.rt7.501.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debug-devel 0:4.18.0-553.160.1.rt7.501.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debug-kvm 0:4.18.0-553.160.1.rt7.501.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debug-modules 0:4.18.0-553.160.1.rt7.501.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debug-modules-extra 0:4.18.0-553.160.1.rt7.501.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debuginfo 0:4.18.0-553.160.1.rt7.501.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debuginfo-common-x86_64 0:4.18.0-553.160.1.rt7.501.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-devel 0:4.18.0-553.160.1.rt7.501.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-kvm 0:4.18.0-553.160.1.rt7.501.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-modules 0:4.18.0-553.160.1.rt7.501.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-modules-extra 0:4.18.0-553.160.1.rt7.501.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt 0:4.18.0-553.160.1.rt7.501.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-core 0:4.18.0-553.160.1.rt7.501.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debug 0:4.18.0-553.160.1.rt7.501.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debug-core 0:4.18.0-553.160.1.rt7.501.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debug-debuginfo 0:4.18.0-553.160.1.rt7.501.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debug-devel 0:4.18.0-553.160.1.rt7.501.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debug-modules 0:4.18.0-553.160.1.rt7.501.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debug-modules-extra 0:4.18.0-553.160.1.rt7.501.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debuginfo 0:4.18.0-553.160.1.rt7.501.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debuginfo-common-x86_64 0:4.18.0-553.160.1.rt7.501.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-devel 0:4.18.0-553.160.1.rt7.501.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-modules 0:4.18.0-553.160.1.rt7.501.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-modules-extra 0:4.18.0-553.160.1.rt7.501.el8_10

Vulnerabilities 7

  • Critical 9.8
    CVE-2026-43493

    crypto: pcrypt - Fix handling of MAY_BACKLOG requests

    In the Linux kernel, the following vulnerability has been resolved: crypto: pcrypt - Fix handling of MAY_BACKLOG requests MAY_BACKLOG requests can return EBUSY. Handle them by checking for that value and filtering out EINPROGRESS notifications.

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  • Critical 9.8
    CVE-2026-53002

    netfilter: conntrack: remove sprintf usage

    In the Linux kernel, the following vulnerability has been resolved: netfilter: conntrack: remove sprintf usage Replace it with scnprintf, the buffer sizes are expected to be large enough to hold the result, no need for snprintf+overflow check. Increase buffer…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  • Critical 9.8
    CVE-2026-64007

    netfilter: synproxy: refresh tcphdr after skb_ensure_writable

    In the Linux kernel, the following vulnerability has been resolved: netfilter: synproxy: refresh tcphdr after skb_ensure_writable synproxy_tstamp_adjust() rewrites the TCP timestamp option in place and then patches the TCP checksum via inet_proto_csum_replace…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  • Critical 9.8
    CVE-2026-72129

    nvmet-rdma: handle inline data with a nonzero offset

    In the Linux kernel, the following vulnerability has been resolved: nvmet-rdma: handle inline data with a nonzero offset nvmet_rdma_use_inline_sg() maps the host-controlled inline data offset into the per-command inline scatterlist. The bounds check admits an…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  • Critical 9.8
    CVE-2026-74480

    net: bridge: stop fast-leave after deleting a port group

    In the Linux kernel, the following vulnerability has been resolved: net: bridge: stop fast-leave after deleting a port group br_multicast_leave_group() iterates mp->ports with pp = &p->next in its fast-leave path. After br_multicast_del_pg() removes p, contin…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  • Critical 9.1
    CVE-2026-68343

    smb: client: validate DFS referral PathConsumed

    In the Linux kernel, the following vulnerability has been resolved: smb: client: validate DFS referral PathConsumed parse_dfs_referrals() validates that the response contains the fixed referral entry array and, on for-next, the per-referral string offsets. Ho…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  • High 7.8
    CVE-2026-64563 Public exploit

    rhashtable: clear stale iter->p on table restart

    In the Linux kernel, the following vulnerability has been resolved: rhashtable: clear stale iter->p on table restart rhashtable_walk_start_check() has two restart paths when resuming a walk. When iter->walker.tbl is valid, it re-validates iter->p against the …

    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=2479812
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2492329
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2502361
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2510892
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2513373
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2516731
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2517046
  • advisory
    https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_64770.json
  • report
    https://access.redhat.com/security/cve/CVE-2026-43493
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-43493
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-43493
  • article
    https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-43493.mbox
  • report
    https://access.redhat.com/security/cve/CVE-2026-53002
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-53002
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-53002
  • article
    https://lore.kernel.org/linux-cve-announce/2026062447-CVE-2026-53002-8577@gregkh/T
  • report
    https://access.redhat.com/security/cve/CVE-2026-64007
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-64007
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-64007
  • article
    https://lore.kernel.org/linux-cve-announce/2026071908-CVE-2026-64007-5e61@gregkh/T
  • report
    https://access.redhat.com/security/cve/CVE-2026-64563
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-64563
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-64563
  • article
    https://lore.kernel.org/linux-cve-announce/2026080404-CVE-2026-64563-9d7f@gregkh/T
  • report
    https://access.redhat.com/security/cve/CVE-2026-68343
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-68343
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-68343
  • article
    https://kernelcve.org/list/?q=CVE-2026-68343
  • article
    https://lore.kernel.org/linux-cve-announce/2026081037-CVE-2026-68343-843c@gregkh/T
  • report
    https://access.redhat.com/security/cve/CVE-2026-72129
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-72129
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-72129
  • article
    https://lore.kernel.org/linux-cve-announce/2026081530-CVE-2026-72129-841e@gregkh/T
  • report
    https://access.redhat.com/security/cve/CVE-2026-74480
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-74480
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-74480
  • article
    https://lore.kernel.org/linux-cve-announce/2026081536-CVE-2026-74480-e620@gregkh/T