Red Hat Security Advisory: kernel update

Fixed packages 158

Vulnerabilities 3

• High 8.8
  CVE-2026-53266 Exploited Public exploit

  netfilter: bridge: make ebt_snat ARP rewrite writable

  In the Linux kernel, the following vulnerability has been resolved: netfilter: bridge: make ebt_snat ARP rewrite writable The ebtables SNAT target keeps the Ethernet source address rewrite behind skb_ensure_writable(skb, 0). This is intentional: at the bridge…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Jun 25, 2026

  KEV Sep 18, 2026
• High 7.8
  CVE-2026-43074 Public exploit

  eventpoll: defer struct eventpoll free to RCU grace period

  In the Linux kernel, the following vulnerability has been resolved: eventpoll: defer struct eventpoll free to RCU grace period In certain situations, ep_free() in eventpoll.c will kfree the epi->ep eventpoll struct while it still being used by another concurr…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  May 6, 2026
• High 7.8
  CVE-2026-46242 Public exploit

  eventpoll: fix ep_remove struct eventpoll / struct file UAF

  In the Linux kernel, the following vulnerability has been resolved: eventpoll: fix ep_remove struct eventpoll / struct file UAF ep_remove() (via ep_remove_file()) cleared file->f_ep under file->f_lock but then kept using @file inside the critical section (is_…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  May 30, 2026

References

• article
  https://access.redhat.com/security/updates/classification/#important
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2467019
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2483519
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2485368
• advisory
  https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_36645.json
• report
  https://access.redhat.com/security/cve/CVE-2026-43074
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-43074
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-43074
• article
  https://lore.kernel.org/linux-cve-announce/2026050601-CVE-2026-43074-ac01@gregkh/T
• report
  https://access.redhat.com/security/cve/CVE-2026-46242
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-46242
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-46242
• article
  https://lore.kernel.org/linux-cve-announce/2026053014-CVE-2026-46242-8394@gregkh/T
• report
  https://access.redhat.com/security/cve/CVE-2026-53266
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-53266
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-53266
• article
  https://lore.kernel.org/linux-cve-announce/2026062517-CVE-2026-53266-6162@gregkh/T/#u
• article
  https://www.cisa.gov/known-exploited-vulnerabilities-catalog