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OpenAdvisories
High RHSA-2026:9512 9 CVEs

Red Hat Security Advisory: kernel-rt security update

Published Apr 22, 2026 · Updated Sep 11, 2026

Ecosystem: Red Hat

Fixed packages 32

ReleasePackageFixed in
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::nfv kernel-rt 0:5.14.0-284.166.1.rt14.451.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::nfv kernel-rt-core 0:5.14.0-284.166.1.rt14.451.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::nfv kernel-rt-debug 0:5.14.0-284.166.1.rt14.451.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::nfv kernel-rt-debug-core 0:5.14.0-284.166.1.rt14.451.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::nfv kernel-rt-debug-debuginfo 0:5.14.0-284.166.1.rt14.451.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::nfv kernel-rt-debug-devel 0:5.14.0-284.166.1.rt14.451.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::nfv kernel-rt-debug-kvm 0:5.14.0-284.166.1.rt14.451.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::nfv kernel-rt-debug-modules 0:5.14.0-284.166.1.rt14.451.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::nfv kernel-rt-debug-modules-core 0:5.14.0-284.166.1.rt14.451.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::nfv kernel-rt-debug-modules-extra 0:5.14.0-284.166.1.rt14.451.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::nfv kernel-rt-debuginfo 0:5.14.0-284.166.1.rt14.451.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::nfv kernel-rt-debuginfo-common-x86_64 0:5.14.0-284.166.1.rt14.451.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::nfv kernel-rt-devel 0:5.14.0-284.166.1.rt14.451.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::nfv kernel-rt-kvm 0:5.14.0-284.166.1.rt14.451.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::nfv kernel-rt-modules 0:5.14.0-284.166.1.rt14.451.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::nfv kernel-rt-modules-core 0:5.14.0-284.166.1.rt14.451.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::nfv kernel-rt-modules-extra 0:5.14.0-284.166.1.rt14.451.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::realtime kernel-rt 0:5.14.0-284.166.1.rt14.451.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::realtime kernel-rt-core 0:5.14.0-284.166.1.rt14.451.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::realtime kernel-rt-debug 0:5.14.0-284.166.1.rt14.451.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::realtime kernel-rt-debug-core 0:5.14.0-284.166.1.rt14.451.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::realtime kernel-rt-debug-debuginfo 0:5.14.0-284.166.1.rt14.451.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::realtime kernel-rt-debug-devel 0:5.14.0-284.166.1.rt14.451.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::realtime kernel-rt-debug-modules 0:5.14.0-284.166.1.rt14.451.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::realtime kernel-rt-debug-modules-core 0:5.14.0-284.166.1.rt14.451.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::realtime kernel-rt-debug-modules-extra 0:5.14.0-284.166.1.rt14.451.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::realtime kernel-rt-debuginfo 0:5.14.0-284.166.1.rt14.451.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::realtime kernel-rt-debuginfo-common-x86_64 0:5.14.0-284.166.1.rt14.451.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::realtime kernel-rt-devel 0:5.14.0-284.166.1.rt14.451.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::realtime kernel-rt-modules 0:5.14.0-284.166.1.rt14.451.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::realtime kernel-rt-modules-core 0:5.14.0-284.166.1.rt14.451.el9_2
Red Hat · RHEL 9.2 E4S rhel_e4s:9.2::realtime kernel-rt-modules-extra 0:5.14.0-284.166.1.rt14.451.el9_2

Vulnerabilities 9

  • High 7.8
    CVE-2025-38248 Public exploit

    bridge: mcast: Fix use-after-free during router port configuration

    In the Linux kernel, the following vulnerability has been resolved: bridge: mcast: Fix use-after-free during router port configuration The bridge maintains a global list of ports behind which a multicast router resides. The list is consulted during forwarding…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  • High 7.8
    CVE-2025-39981

    Bluetooth: MGMT: Fix possible UAFs

    In the Linux kernel, the following vulnerability has been resolved: Bluetooth: MGMT: Fix possible UAFs This attemps to fix possible UAFs caused by struct mgmt_pending being freed while still being processed like in the following trace, in order to fix mgmt_pe…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  • High 7.8
    CVE-2025-68800

    mlxsw: spectrum_mr: Fix use-after-free when updating multicast route stats

    In the Linux kernel, the following vulnerability has been resolved: mlxsw: spectrum_mr: Fix use-after-free when updating multicast route stats Cited commit added a dedicated mutex (instead of RTNL) to protect the multicast route list, so that it will not chan…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  • High 7.8
    CVE-2026-23066

    rxrpc: Fix recvmsg() unconditional requeue

    In the Linux kernel, the following vulnerability has been resolved: rxrpc: Fix recvmsg() unconditional requeue If rxrpc_recvmsg() fails because MSG_DONTWAIT was specified but the call at the front of the recvmsg queue already has its mutex locked, it requeues…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  • High 7.8
    CVE-2026-23171

    bonding: fix use-after-free due to enslave fail after slave array update

    In the Linux kernel, the following vulnerability has been resolved: bonding: fix use-after-free due to enslave fail after slave array update Fix a use-after-free which happens due to enslave failure after the new slave has been added to the array. Since the n…

    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 7.8
    CVE-2026-23231 Public exploit

    netfilter: nf_tables: fix use-after-free in nf_tables_addchain()

    In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: fix use-after-free in nf_tables_addchain() nf_tables_addchain() publishes the chain to table->chains via list_add_tail_rcu() (in nft_chain_add()) before registering hook…

    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
  • Unscored —
    CVE-2026-23144

    mm/damon/sysfs: cleanup attrs subdirs on context dir setup failure

    In the Linux kernel, the following vulnerability has been resolved: mm/damon/sysfs: cleanup attrs subdirs on context dir setup failure When a context DAMON sysfs directory setup is failed after setup of attrs/ directory, subdirectories of attrs/ directory are…

    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=2378981
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2404105
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2429065
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2436805
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2439872
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2439886
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2439900
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2439931
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2444376
  • advisory
    https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_9512.json
  • report
    https://access.redhat.com/security/cve/CVE-2025-38248
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2025-38248
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2025-38248
  • article
    https://lore.kernel.org/linux-cve-announce/2025070934-CVE-2025-38248-003c@gregkh/T
  • report
    https://access.redhat.com/security/cve/CVE-2025-39981
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2025-39981
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2025-39981
  • article
    https://lore.kernel.org/linux-cve-announce/2025101559-CVE-2025-39981-fe1d@gregkh/T
  • report
    https://access.redhat.com/security/cve/CVE-2025-68800
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2025-68800
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2025-68800
  • article
    https://lore.kernel.org/linux-cve-announce/2026011307-CVE-2025-68800-39d2@gregkh/T
  • report
    https://access.redhat.com/security/cve/CVE-2026-23066
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-23066
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-23066
  • article
    https://lore.kernel.org/linux-cve-announce/2026020416-CVE-2026-23066-8e44@gregkh/T
  • report
    https://access.redhat.com/security/cve/CVE-2026-23144
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-23144
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-23144
  • article
    https://lore.kernel.org/linux-cve-announce/2026021417-CVE-2026-23144-297b@gregkh/T
  • report
    https://access.redhat.com/security/cve/CVE-2026-23171
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-23171
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-23171
  • article
    https://lore.kernel.org/linux-cve-announce/2026021421-CVE-2026-23171-5a73@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