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

Fixed packages 71

Vulnerabilities 11

• 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
  Jul 19, 2026
• Critical 9.8
  CVE-2026-64534

  nvmet-tcp: check INIT_FAILED before nvmet_req_uninit in digest error path

  In the Linux kernel, the following vulnerability has been resolved: nvmet-tcp: check INIT_FAILED before nvmet_req_uninit in digest error path In nvmet_tcp_try_recv_ddgst(), when a data digest mismatch is detected, nvmet_req_uninit() is called unconditionally.…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Jul 27, 2026
• Critical 9.8
  CVE-2026-74556

  scsi: libiscsi_tcp: Bound SCSI Response data segment to the connection buffer

  In the Linux kernel, the following vulnerability has been resolved: scsi: libiscsi_tcp: Bound SCSI Response data segment to the connection buffer iscsi_tcp_hdr_dissect() receives the data segment of several PDU types into the fixed-size conn->data buffer, whi…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Aug 15, 2026
• Critical 9.8
  CVE-2026-98432 Public exploit

  ipv4: free inet_opt and ireq_opt after an RCU grace period

  In the Linux kernel, the following vulnerability has been resolved: ipv4: free inet_opt and ireq_opt after an RCU grace period tcp_v4_syn_recv_sock() transfers ownership of ireq->ireq_opt to the child socket (newinet->inet_opt) without copying it. Another cpu…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Oct 15, 2026
• High 8.1
  CVE-2026-43051

  HID: wacom: fix out-of-bounds read in wacom_intuos_bt_irq

  In the Linux kernel, the following vulnerability has been resolved: HID: wacom: fix out-of-bounds read in wacom_intuos_bt_irq The wacom_intuos_bt_irq() function processes Bluetooth HID reports without sufficient bounds checking. A maliciously crafted short re…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  May 1, 2026
• High 7.8
  CVE-2025-71066

  net/sched: ets: Always remove class from active list before deleting in ets_qdisc_change

  In the Linux kernel, the following vulnerability has been resolved: net/sched: ets: Always remove class from active list before deleting in ets_qdisc_change zdi-disclosures@trendmicro.com says: The vulnerability is a race condition between `ets_qdisc_dequeue`…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Jan 13, 2026
• High 7.8
  CVE-2026-46259

  procfs: fix missing RCU protection when reading real_parent in do_task_stat()

  In the Linux kernel, the following vulnerability has been resolved: procfs: fix missing RCU protection when reading real_parent in do_task_stat() When reading /proc/[pid]/stat, do_task_stat() accesses task->real_parent without proper RCU protection, which lea…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Jun 3, 2026
• High 7.8
  CVE-2026-53062

  dm cache policy smq: fix missing locks in invalidating cache blocks

  In the Linux kernel, the following vulnerability has been resolved: dm cache policy smq: fix missing locks in invalidating cache blocks In passthrough mode, the policy invalidate_mapping operation is called simultaneously from multiple workers, thus it should…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Jun 24, 2026
• High 7.5
  CVE-2026-89481

  nvme-tcp: fix host memory disclosure on R2T for a read command

  In the Linux kernel, the following vulnerability has been resolved: nvme-tcp: fix host memory disclosure on R2T for a read command nvme_tcp_handle_r2t() does not check the direction of the request the R2T refers to. A malicious controller can send an R2T for …

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Sep 11, 2026
• Unscored —
  CVE-2026-53073

  Bluetooth: hci_ldisc: Clear HCI_UART_PROTO_INIT on error

  In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_ldisc: Clear HCI_UART_PROTO_INIT on error When hci_register_dev() fails in hci_uart_register_dev() HCI_UART_PROTO_INIT is not cleared before calling hu->proto->close(hu) and se…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Jun 24, 2026
• Unscored —
  CVE-2026-99284

  net: skbuff: propagate shared-frag marker in skb_zerocopy()

  In the Linux kernel, the following vulnerability has been resolved: net: skbuff: propagate shared-frag marker in skb_zerocopy() skb_zerocopy() moves frag descriptors from @from into @to and takes a reference on each frag, but it does not copy skb_shinfo(from)…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Nov 7, 2026

References

• article
  https://access.redhat.com/security/updates/classification/#critical
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2429036
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2464462
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2484477
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2492278
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2492447
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2502361
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2507399
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2517010
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2532184
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2553390
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2559835
• advisory
  https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_94477.json
• report
  https://access.redhat.com/security/cve/CVE-2025-71066
• advisory
  https://www.cve.org/CVERecord?id=CVE-2025-71066
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2025-71066
• article
  https://lore.kernel.org/linux-cve-announce/2026011323-CVE-2025-71066-f1fa@gregkh/T
• report
  https://access.redhat.com/security/cve/CVE-2026-43051
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-43051
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-43051
• article
  https://lore.kernel.org/linux-cve-announce/2026050107-CVE-2026-43051-0d15@gregkh/T
• report
  https://access.redhat.com/security/cve/CVE-2026-46259
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-46259
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-46259
• article
  https://lore.kernel.org/linux-cve-announce/2026060336-CVE-2026-46259-6c94@gregkh/T
• report
  https://access.redhat.com/security/cve/CVE-2026-53062
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-53062
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-53062
• article
  https://lore.kernel.org/linux-cve-announce/2026062402-CVE-2026-53062-a727@gregkh/T
• report
  https://access.redhat.com/security/cve/CVE-2026-53073
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-53073
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-53073
• article
  https://lore.kernel.org/linux-cve-announce/2026062405-CVE-2026-53073-9692@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-2026-64534
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-64534