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OpenAdvisories
Critical RHSA-2026:77500 3 CVEs

Red Hat Security Advisory: kernel-rt security update

Published Oct 8, 2026 · Updated Oct 17, 2026

Ecosystem: Red Hat

Fixed packages 28

ReleasePackageFixed in
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt 0:4.18.0-553.172.1.rt7.513.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-core 0:4.18.0-553.172.1.rt7.513.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debug 0:4.18.0-553.172.1.rt7.513.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debug-core 0:4.18.0-553.172.1.rt7.513.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debug-debuginfo 0:4.18.0-553.172.1.rt7.513.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debug-devel 0:4.18.0-553.172.1.rt7.513.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debug-kvm 0:4.18.0-553.172.1.rt7.513.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debug-modules 0:4.18.0-553.172.1.rt7.513.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debug-modules-extra 0:4.18.0-553.172.1.rt7.513.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debuginfo 0:4.18.0-553.172.1.rt7.513.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debuginfo-common-x86_64 0:4.18.0-553.172.1.rt7.513.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-devel 0:4.18.0-553.172.1.rt7.513.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-kvm 0:4.18.0-553.172.1.rt7.513.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-modules 0:4.18.0-553.172.1.rt7.513.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-modules-extra 0:4.18.0-553.172.1.rt7.513.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt 0:4.18.0-553.172.1.rt7.513.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-core 0:4.18.0-553.172.1.rt7.513.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debug 0:4.18.0-553.172.1.rt7.513.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debug-core 0:4.18.0-553.172.1.rt7.513.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debug-debuginfo 0:4.18.0-553.172.1.rt7.513.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debug-devel 0:4.18.0-553.172.1.rt7.513.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debug-modules 0:4.18.0-553.172.1.rt7.513.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debug-modules-extra 0:4.18.0-553.172.1.rt7.513.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debuginfo 0:4.18.0-553.172.1.rt7.513.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debuginfo-common-x86_64 0:4.18.0-553.172.1.rt7.513.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-devel 0:4.18.0-553.172.1.rt7.513.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-modules 0:4.18.0-553.172.1.rt7.513.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-modules-extra 0:4.18.0-553.172.1.rt7.513.el8_10

Vulnerabilities 3

  • Critical 9.8
    CVE-2026-89530

    svcrdma: Reject inline replies that overflow the pull-up buffer

    In the Linux kernel, the following vulnerability has been resolved: svcrdma: Reject inline replies that overflow the pull-up buffer An RPC-over-RDMA client can request a reply, such as an NFS READ payload, without providing a Write list or a Reply chunk to ca…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  • High 8.8
    CVE-2026-64115

    vsock/vmci: fix UAF when peer resets connection during handshake

    In the Linux kernel, the following vulnerability has been resolved: vsock/vmci: fix UAF when peer resets connection during handshake vmci_transport_recv_connecting_server() returned err = 0 for a peer RST in its default switch arm: err = pkt->type == VMCI_TRA…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  • High 7.8
    CVE-2026-74582

    packet: use consistent hard_header_len in non-ring send paths

    In the Linux kernel, the following vulnerability has been resolved: packet: use consistent hard_header_len in non-ring send paths packet_snd() reads dev->hard_header_len multiple times while allocating and constructing an skb. Device reconfiguration can chang…

    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=2502593
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2519475
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2521057
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2532218
  • advisory
    https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_77500.json
  • report
    https://access.redhat.com/security/cve/CVE-2026-64115
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-64115
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-64115
  • article
    https://lore.kernel.org/linux-cve-announce/2026071923-CVE-2026-64115-de9e@gregkh/T
  • report
    https://access.redhat.com/security/cve/CVE-2026-74582
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-74582
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-74582
  • article
    https://lore.kernel.org/linux-cve-announce/2026082100-CVE-2026-74582-3296@gregkh/T
  • report
    https://access.redhat.com/security/cve/CVE-2026-89530
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-89530
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-89530
  • article
    https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89530.mbox