Red Hat Security Advisory: kernel security update

Fixed packages 124

Vulnerabilities 2

• Critical 9.8
  CVE-2026-74480

  net: bridge: stop fast-leave after deleting a port group

  In the Linux kernel, the following vulnerability has been resolved: net: bridge: stop fast-leave after deleting a port group br_multicast_leave_group() iterates mp->ports with pp = &p->next in its fast-leave path. After br_multicast_del_pg() removes p, contin…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Aug 15, 2026
• High 7.8
  CVE-2026-64002

  ipv4: free net->ipv4.sysctl_local_reserved_ports after unregister_net_sysctl_table()

  In the Linux kernel, the following vulnerability has been resolved: ipv4: free net->ipv4.sysctl_local_reserved_ports after unregister_net_sysctl_table() ipv4_sysctl_exit_net() is currently freeing net->ipv4.sysctl_local_reserved_ports too soon. Only after unr…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Jul 19, 2026

References

• article
  https://access.redhat.com/security/updates/classification/#important
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2502363
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2517046
• advisory
  https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_62346.json
• report
  https://access.redhat.com/security/cve/CVE-2026-64002
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-64002
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-64002
• article
  https://lore.kernel.org/linux-cve-announce/2026071907-CVE-2026-64002-b8fe@gregkh/T
• report
  https://access.redhat.com/security/cve/CVE-2026-74480
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-74480
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-74480
• article
  https://lore.kernel.org/linux-cve-announce/2026081536-CVE-2026-74480-e620@gregkh/T