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OpenAdvisories
High 1 exploited CVE RHSA-2026:19664 3 CVEs

Red Hat Security Advisory: kernel-rt security update

Published May 21, 2026 · Updated Nov 13, 2026

Ecosystem: Red Hat

Fixed packages 28

ReleasePackageFixed in
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt 0:4.18.0-553.125.1.rt7.466.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-core 0:4.18.0-553.125.1.rt7.466.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debug 0:4.18.0-553.125.1.rt7.466.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debug-core 0:4.18.0-553.125.1.rt7.466.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debug-debuginfo 0:4.18.0-553.125.1.rt7.466.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debug-devel 0:4.18.0-553.125.1.rt7.466.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debug-kvm 0:4.18.0-553.125.1.rt7.466.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debug-modules 0:4.18.0-553.125.1.rt7.466.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debug-modules-extra 0:4.18.0-553.125.1.rt7.466.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debuginfo 0:4.18.0-553.125.1.rt7.466.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debuginfo-common-x86_64 0:4.18.0-553.125.1.rt7.466.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-devel 0:4.18.0-553.125.1.rt7.466.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-kvm 0:4.18.0-553.125.1.rt7.466.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-modules 0:4.18.0-553.125.1.rt7.466.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-modules-extra 0:4.18.0-553.125.1.rt7.466.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt 0:4.18.0-553.125.1.rt7.466.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-core 0:4.18.0-553.125.1.rt7.466.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debug 0:4.18.0-553.125.1.rt7.466.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debug-core 0:4.18.0-553.125.1.rt7.466.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debug-debuginfo 0:4.18.0-553.125.1.rt7.466.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debug-devel 0:4.18.0-553.125.1.rt7.466.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debug-modules 0:4.18.0-553.125.1.rt7.466.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debug-modules-extra 0:4.18.0-553.125.1.rt7.466.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debuginfo 0:4.18.0-553.125.1.rt7.466.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debuginfo-common-x86_64 0:4.18.0-553.125.1.rt7.466.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-devel 0:4.18.0-553.125.1.rt7.466.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-modules 0:4.18.0-553.125.1.rt7.466.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-modules-extra 0:4.18.0-553.125.1.rt7.466.el8_10

Vulnerabilities 3

  • High 7.8
    CVE-2026-46300 Exploited Public exploit EPSS 16%

    net: skbuff: preserve shared-frag marker during coalescing

    In the Linux kernel, the following vulnerability has been resolved: net: skbuff: preserve shared-frag marker during coalescing skb_try_coalesce() can attach paged frags from @from to @to. If @from has SKBFL_SHARED_FRAG set, the resulting @to skb can contain t…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
    KEV Oct 28, 2026
  • High 8.8
    CVE-2026-43503 Public exploit

    net: skbuff: propagate shared-frag marker through frag-transfer helpers

    In the Linux kernel, the following vulnerability has been resolved: net: skbuff: propagate shared-frag marker through frag-transfer helpers Two frag-transfer helpers (__pskb_copy_fclone() and skb_shift()) fail to propagate the SKBFL_SHARED_FRAG bit in skb_shi…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  • High 7.1
    CVE-2026-46333 Public exploit

    ptrace: slightly saner 'get_dumpable()' logic

    In the Linux kernel, the following vulnerability has been resolved: ptrace: slightly saner 'get_dumpable()' logic The 'dumpability' of a task is fundamentally about the memory image of the task - the concept comes from whether it can core dump or not - and ma…

    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=2477015
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2477802
  • advisory
    https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_19664.json
  • report
    https://access.redhat.com/security/cve/CVE-2026-43503
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2480902
  • article
    https://access.redhat.com/security/vulnerabilities/RHSB-2026-003
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-43503
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-43503
  • article
    https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-43503.mbox
  • report
    https://access.redhat.com/security/cve/CVE-2026-46300
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-46300
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-46300
  • article
    https://www.cisa.gov/known-exploited-vulnerabilities-catalog
  • report
    https://access.redhat.com/security/cve/CVE-2026-46333
  • article
    https://access.redhat.com/security/vulnerabilities/RHSB-2026-004
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-46333
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-46333
  • article
    https://blog.qualys.com/vulnerabilities-threat-research/2026/05/20/cve-2026-46333-local-root-privilege-escalation-and-credential-disclosure-in-the-linux-kernel-ptrace-path
  • article
    https://github.com/torvalds/linux/commit/31e62c2ebbfdc3fe3dbdf5e02c92a9dc67087a3a