Red Hat Security Advisory: kernel security update

Fixed packages 49

Vulnerabilities 4

• Critical 9.8
  CVE-2026-53006

  ipv6: fix possible UAF in icmpv6_rcv()

  In the Linux kernel, the following vulnerability has been resolved: ipv6: fix possible UAF in icmpv6_rcv() Caching saddr and daddr before pskb_pull() is problematic since skb->head can change. Remove these temporary variables: - We only access &ipv6_hdr(skb)-…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Jun 24, 2026
• Critical 9.8
  CVE-2026-74581

  net: ipv6: clear suppressed fib6 rule result

  In the Linux kernel, the following vulnerability has been resolved: net: ipv6: clear suppressed fib6 rule result fib6_rule_suppress() drops a suppressed route with ip6_rt_put_flags(), but leaves res->rt6 pointing at the released rt6_info. If no later rule sup…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Aug 21, 2026
• High 7.8
  CVE-2026-17523

  can: bcm: switch timer to HRTIMER_MODE_SOFT and remove hrtimer_tasklet

  In the Linux kernel, the following vulnerability has been resolved: can: bcm: switch timer to HRTIMER_MODE_SOFT and remove hrtimer_tasklet This patch switches the timer to HRTIMER_MODE_SOFT, which executed the timer callback in softirq context and removes the…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Jul 27, 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=2492363
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2502363
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2507407
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2520980
• advisory
  https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_61932.json
• report
  https://access.redhat.com/security/cve/CVE-2026-17523
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-17523
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-17523
• article
  https://github.com/torvalds/linux/commit/bf74aa86e111aa3b2fbb25db37e3a3fab71b5b68
• report
  https://access.redhat.com/security/cve/CVE-2026-53006
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-53006
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-53006
• article
  https://lore.kernel.org/linux-cve-announce/2026062448-CVE-2026-53006-2b02@gregkh/T
• 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-2026-74581
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-74581
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-74581
• article
  https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=6aea62e433fe1b586202a5fee8b5807ce635e1d7