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OpenAdvisories
High RHSA-2026:6036 3 CVEs

Red Hat Security Advisory: kernel-rt security update

Published Mar 31, 2026 · Updated Aug 22, 2026

Ecosystem: Red Hat

Fixed packages 28

ReleasePackageFixed in
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt 0:4.18.0-553.115.1.rt7.456.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-core 0:4.18.0-553.115.1.rt7.456.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debug 0:4.18.0-553.115.1.rt7.456.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debug-core 0:4.18.0-553.115.1.rt7.456.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debug-debuginfo 0:4.18.0-553.115.1.rt7.456.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debug-devel 0:4.18.0-553.115.1.rt7.456.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debug-kvm 0:4.18.0-553.115.1.rt7.456.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debug-modules 0:4.18.0-553.115.1.rt7.456.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debug-modules-extra 0:4.18.0-553.115.1.rt7.456.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debuginfo 0:4.18.0-553.115.1.rt7.456.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debuginfo-common-x86_64 0:4.18.0-553.115.1.rt7.456.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-devel 0:4.18.0-553.115.1.rt7.456.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-kvm 0:4.18.0-553.115.1.rt7.456.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-modules 0:4.18.0-553.115.1.rt7.456.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-modules-extra 0:4.18.0-553.115.1.rt7.456.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt 0:4.18.0-553.115.1.rt7.456.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-core 0:4.18.0-553.115.1.rt7.456.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debug 0:4.18.0-553.115.1.rt7.456.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debug-core 0:4.18.0-553.115.1.rt7.456.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debug-debuginfo 0:4.18.0-553.115.1.rt7.456.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debug-devel 0:4.18.0-553.115.1.rt7.456.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debug-modules 0:4.18.0-553.115.1.rt7.456.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debug-modules-extra 0:4.18.0-553.115.1.rt7.456.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debuginfo 0:4.18.0-553.115.1.rt7.456.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debuginfo-common-x86_64 0:4.18.0-553.115.1.rt7.456.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-devel 0:4.18.0-553.115.1.rt7.456.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-modules 0:4.18.0-553.115.1.rt7.456.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-modules-extra 0:4.18.0-553.115.1.rt7.456.el8_10

Vulnerabilities 3

  • High 7.8
    CVE-2025-38180

    net: atm: fix /proc/net/atm/lec handling

    In the Linux kernel, the following vulnerability has been resolved: net: atm: fix /proc/net/atm/lec handling /proc/net/atm/lec must ensure safety against dev_lec[] changes. It appears it had dev_put() calls without prior dev_hold(), leading to imbalance and U…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  • High 7.8
    CVE-2026-23209

    macvlan: fix error recovery in macvlan_common_newlink()

    In the Linux kernel, the following vulnerability has been resolved: macvlan: fix error recovery in macvlan_common_newlink() valis provided a nice repro to crash the kernel: ip link add p1 type veth peer p2 ip link set address 00:00:00:00:00:20 dev p1 ip link …

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  • High 7.1
    CVE-2026-23204

    net/sched: cls_u32: use skb_header_pointer_careful()

    In the Linux kernel, the following vulnerability has been resolved: net/sched: cls_u32: use skb_header_pointer_careful() skb_header_pointer() does not fully validate negative @offset values. Use skb_header_pointer_careful() instead. GangMin Kim provided a rep…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux

References

  • article
    https://access.redhat.com/security/updates/classification/#moderate
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2376376
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2439900
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2439931
  • advisory
    https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_6036.json
  • report
    https://access.redhat.com/security/cve/CVE-2025-38180
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2025-38180
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2025-38180
  • article
    https://lore.kernel.org/linux-cve-announce/2025070410-CVE-2025-38180-c6d0@gregkh/T
  • report
    https://access.redhat.com/security/cve/CVE-2026-23204
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-23204
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-23204
  • article
    https://lore.kernel.org/linux-cve-announce/2026021437-CVE-2026-23204-be85@gregkh/T
  • report
    https://access.redhat.com/security/cve/CVE-2026-23209
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-23209
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-23209
  • article
    https://lore.kernel.org/linux-cve-announce/2026021439-CVE-2026-23209-9ad6@gregkh/T