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

Fixed packages 44

Vulnerabilities 1

• Critical 9.8
  CVE-2026-43037

  ip6_tunnel: clear skb2->cb[] in ip4ip6_err()

  In the Linux kernel, the following vulnerability has been resolved: ip6_tunnel: clear skb2->cb[] in ip4ip6_err() Oskar Kjos reported the following problem. ip4ip6_err() calls icmp_send() on a cloned skb whose cb[] was written by the IPv6 receive path as struc…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  May 1, 2026

References

• article
  https://access.redhat.com/security/updates/classification/#critical
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2464351
• article
  https://issues.redhat.com/browse/VOYAGER-1032
• advisory
  https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_25534.json
• report
  https://access.redhat.com/security/cve/CVE-2026-43037
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-43037
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-43037
• article
  https://lore.kernel.org/linux-cve-announce/2026050102-CVE-2026-43037-0346@gregkh/T