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OpenAdvisories
High 1 exploited CVE RHSA-2026:19875 8 CVEs

Red Hat Security Advisory: kernel-rt security update

Published May 21, 2026 · Updated Nov 13, 2026

Ecosystem: Red Hat

Fixed packages 32

ReleasePackageFixed in
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::nfv kernel-rt 0:5.14.0-284.172.1.rt14.457.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::nfv kernel-rt-core 0:5.14.0-284.172.1.rt14.457.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::nfv kernel-rt-debug 0:5.14.0-284.172.1.rt14.457.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::nfv kernel-rt-debug-core 0:5.14.0-284.172.1.rt14.457.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::nfv kernel-rt-debug-debuginfo 0:5.14.0-284.172.1.rt14.457.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::nfv kernel-rt-debug-devel 0:5.14.0-284.172.1.rt14.457.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::nfv kernel-rt-debug-kvm 0:5.14.0-284.172.1.rt14.457.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::nfv kernel-rt-debug-modules 0:5.14.0-284.172.1.rt14.457.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::nfv kernel-rt-debug-modules-core 0:5.14.0-284.172.1.rt14.457.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::nfv kernel-rt-debug-modules-extra 0:5.14.0-284.172.1.rt14.457.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::nfv kernel-rt-debuginfo 0:5.14.0-284.172.1.rt14.457.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::nfv kernel-rt-debuginfo-common-x86_64 0:5.14.0-284.172.1.rt14.457.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::nfv kernel-rt-devel 0:5.14.0-284.172.1.rt14.457.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::nfv kernel-rt-kvm 0:5.14.0-284.172.1.rt14.457.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::nfv kernel-rt-modules 0:5.14.0-284.172.1.rt14.457.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::nfv kernel-rt-modules-core 0:5.14.0-284.172.1.rt14.457.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::nfv kernel-rt-modules-extra 0:5.14.0-284.172.1.rt14.457.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::realtime kernel-rt 0:5.14.0-284.172.1.rt14.457.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::realtime kernel-rt-core 0:5.14.0-284.172.1.rt14.457.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::realtime kernel-rt-debug 0:5.14.0-284.172.1.rt14.457.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::realtime kernel-rt-debug-core 0:5.14.0-284.172.1.rt14.457.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::realtime kernel-rt-debug-debuginfo 0:5.14.0-284.172.1.rt14.457.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::realtime kernel-rt-debug-devel 0:5.14.0-284.172.1.rt14.457.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::realtime kernel-rt-debug-modules 0:5.14.0-284.172.1.rt14.457.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::realtime kernel-rt-debug-modules-core 0:5.14.0-284.172.1.rt14.457.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::realtime kernel-rt-debug-modules-extra 0:5.14.0-284.172.1.rt14.457.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::realtime kernel-rt-debuginfo 0:5.14.0-284.172.1.rt14.457.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::realtime kernel-rt-debuginfo-common-x86_64 0:5.14.0-284.172.1.rt14.457.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::realtime kernel-rt-devel 0:5.14.0-284.172.1.rt14.457.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::realtime kernel-rt-modules 0:5.14.0-284.172.1.rt14.457.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::realtime kernel-rt-modules-core 0:5.14.0-284.172.1.rt14.457.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::realtime kernel-rt-modules-extra 0:5.14.0-284.172.1.rt14.457.el9_2

Vulnerabilities 8

  • 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 8.1
    CVE-2026-23401

    KVM: x86/mmu: Drop/zap existing present SPTE even when creating an MMIO SPTE

    In the Linux kernel, the following vulnerability has been resolved: KVM: x86/mmu: Drop/zap existing present SPTE even when creating an MMIO SPTE When installing an emulated MMIO SPTE, do so *after* dropping/zapping the existing SPTE (if it's shadow-present). …

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  • High 7.8
    CVE-2025-21999

    proc: fix UAF in proc_get_inode()

    In the Linux kernel, the following vulnerability has been resolved: proc: fix UAF in proc_get_inode() Fix race between rmmod and /proc/XXX's inode instantiation. The bug is that pde->proc_ops don't belong to /proc, it belongs to a module, therefore dereferenc…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  • High 7.8
    CVE-2026-23243

    RDMA/umad: Reject negative data_len in ib_umad_write

    In the Linux kernel, the following vulnerability has been resolved: RDMA/umad: Reject negative data_len in ib_umad_write ib_umad_write computes data_len from user-controlled count and the MAD header sizes. With a mismatched user MAD header size and RMPP heade…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  • High 7.8
    CVE-2026-31532

    can: raw: fix ro->uniq use-after-free in raw_rcv()

    In the Linux kernel, the following vulnerability has been resolved: can: raw: fix ro->uniq use-after-free in raw_rcv() raw_release() unregisters raw CAN receive filters via can_rx_unregister(), but receiver deletion is deferred with call_rcu(). This leaves a …

    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
  • Unscored —
    CVE-2025-71238

    scsi: qla2xxx: Fix bsg_done() causing double free

    In the Linux kernel, the following vulnerability has been resolved: scsi: qla2xxx: Fix bsg_done() causing double free Kernel panic observed on system, [5353358.825191] BUG: unable to handle page fault for address: ff5f5e897b024000 [5353358.825194] #PF: superv…

    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=2357134
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2444398
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2448594
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2453803
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2461107
  • 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_19875.json
  • report
    https://access.redhat.com/security/cve/CVE-2025-21999
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2025-21999
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2025-21999
  • article
    https://lore.kernel.org/linux-cve-announce/2025040348-CVE-2025-21999-bc57@gregkh/T
  • report
    https://access.redhat.com/security/cve/CVE-2025-71238
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2025-71238
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2025-71238
  • article
    https://lore.kernel.org/linux-cve-announce/2026030437-CVE-2025-71238-76bc@gregkh/T
  • report
    https://access.redhat.com/security/cve/CVE-2026-23243
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-23243
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-23243
  • article
    https://lore.kernel.org/linux-cve-announce/2026031816-CVE-2026-23243-b88e@gregkh/T
  • report
    https://access.redhat.com/security/cve/CVE-2026-23401
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-23401
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-23401
  • article
    https://lore.kernel.org/linux-cve-announce/2026040108-CVE-2026-23401-956d@gregkh/T
  • report
    https://access.redhat.com/security/cve/CVE-2026-31532
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-31532
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-31532
  • article
    https://lore.kernel.org/linux-cve-announce/2026042349-CVE-2026-31532-a820@gregkh/T
  • 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