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OpenAdvisories
Critical RHSA-2026:81371 4 CVEs

Red Hat Security Advisory: kernel-rt security, bug fix, and enhancement update

Published Oct 14, 2026 · Updated Oct 15, 2026

Ecosystem: Red Hat

Fixed packages 11

ReleasePackageFixed in
Red Hat · Rhel Extras Rt Els 7 rhel_extras_rt_els:7 kernel-rt 0:3.10.0-1160.167.1.rt56.1319.el7
Red Hat · Rhel Extras Rt Els 7 rhel_extras_rt_els:7 kernel-rt-debug 0:3.10.0-1160.167.1.rt56.1319.el7
Red Hat · Rhel Extras Rt Els 7 rhel_extras_rt_els:7 kernel-rt-debug-debuginfo 0:3.10.0-1160.167.1.rt56.1319.el7
Red Hat · Rhel Extras Rt Els 7 rhel_extras_rt_els:7 kernel-rt-debug-devel 0:3.10.0-1160.167.1.rt56.1319.el7
Red Hat · Rhel Extras Rt Els 7 rhel_extras_rt_els:7 kernel-rt-debuginfo 0:3.10.0-1160.167.1.rt56.1319.el7
Red Hat · Rhel Extras Rt Els 7 rhel_extras_rt_els:7 kernel-rt-debuginfo-common-x86_64 0:3.10.0-1160.167.1.rt56.1319.el7
Red Hat · Rhel Extras Rt Els 7 rhel_extras_rt_els:7 kernel-rt-devel 0:3.10.0-1160.167.1.rt56.1319.el7
Red Hat · Rhel Extras Rt Els 7 rhel_extras_rt_els:7 kernel-rt-doc 0:3.10.0-1160.167.1.rt56.1319.el7
Red Hat · Rhel Extras Rt Els 7 rhel_extras_rt_els:7 kernel-rt-trace 0:3.10.0-1160.167.1.rt56.1319.el7
Red Hat · Rhel Extras Rt Els 7 rhel_extras_rt_els:7 kernel-rt-trace-debuginfo 0:3.10.0-1160.167.1.rt56.1319.el7
Red Hat · Rhel Extras Rt Els 7 rhel_extras_rt_els:7 kernel-rt-trace-devel 0:3.10.0-1160.167.1.rt56.1319.el7

Vulnerabilities 4

  • Critical 10.0
    CVE-2026-74705

    udp: fix potential use-after-free in tunnel segmentation

    In the Linux kernel, the following vulnerability has been resolved: udp: fix potential use-after-free in tunnel segmentation __skb_udp_tunnel_segment() gets the UDP header before ensuring the tunnel header is in the skb head. If the pull reallocates skb->head…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  • 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
  • High 8.8
    CVE-2026-74580 Public exploit

    vhost: reset the vring metadata cache on vring reconfiguration

    In the Linux kernel, the following vulnerability has been resolved: vhost: reset the vring metadata cache on vring reconfiguration vq->meta_iotlb[] caches the vhost_iotlb_map that backs each vring metadata region, and iotlb_access_ok() returns early on a cach…

    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=2492329
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2502361
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2521055
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2521498
  • advisory
    https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_81371.json
  • 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-2026-74580
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-74580
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-74580
  • article
    https://lore.kernel.org/linux-cve-announce/2026082158-CVE-2026-74580-5db9@gregkh/T
  • report
    https://access.redhat.com/security/cve/CVE-2026-74705
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-74705
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-74705
  • article
    https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-74705.mbox