Red Hat Security Advisory: kernel security update

Fixed packages 49

Vulnerabilities 7

• Critical 9.8
  CVE-2024-41073

  nvme: avoid double free special payload

  In the Linux kernel, the following vulnerability has been resolved: nvme: avoid double free special payload If a discard request needs to be retried, and that retry may fail before a new special payload is added, a double free will result. Clear the RQF_SPECI…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Jul 29, 2024
• 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
• Critical 9.8
  CVE-2026-43038

  ipv6: icmp: clear skb2->cb[] in ip6_err_gen_icmpv6_unreach()

  In the Linux kernel, the following vulnerability has been resolved: ipv6: icmp: clear skb2->cb[] in ip6_err_gen_icmpv6_unreach() Sashiko AI-review observed: In ip6_err_gen_icmpv6_unreach(), the skb is an outer IPv4 ICMP error packet where its cb contains an I…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  May 1, 2026
• High 8.1
  CVE-2025-40135

  ipv6: use RCU in ip6_xmit()

  In the Linux kernel, the following vulnerability has been resolved: ipv6: use RCU in ip6_xmit() Use RCU in ip6_xmit() in order to use dst_dev_rcu() to prevent possible UAF.

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Nov 12, 2025
• High 8.1
  CVE-2025-40158

  ipv6: use RCU in ip6_output()

  In the Linux kernel, the following vulnerability has been resolved: ipv6: use RCU in ip6_output() Use RCU in ip6_output() in order to use dst_dev_rcu() to prevent possible UAF. We can remove rcu_read_lock()/rcu_read_unlock() pairs from ip6_finish_output2().

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Nov 12, 2025
• High 7.8
  CVE-2025-40170

  net: use dst_dev_rcu() in sk_setup_caps()

  In the Linux kernel, the following vulnerability has been resolved: net: use dst_dev_rcu() in sk_setup_caps() Use RCU to protect accesses to dst->dev from sk_setup_caps() and sk_dst_gso_max_size(). Also use dst_dev_rcu() in ip6_dst_mtu_maybe_forward(), and ip…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Nov 12, 2025
• Unscored —
  CVE-2026-23216

  scsi: target: iscsi: Fix use-after-free in iscsit_dec_conn_usage_count()

  In the Linux kernel, the following vulnerability has been resolved: scsi: target: iscsi: Fix use-after-free in iscsit_dec_conn_usage_count() In iscsit_dec_conn_usage_count(), the function calls complete() while holding the conn->conn_usage_lock. As soon as co…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Feb 18, 2026

References

• article
  https://access.redhat.com/security/updates/classification/#important
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2301637
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2414506
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2414521
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2414523
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2440630
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2464351
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2464397
• advisory
  https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_22964.json
• report
  https://access.redhat.com/security/cve/CVE-2024-41073
• advisory
  https://www.cve.org/CVERecord?id=CVE-2024-41073
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2024-41073
• article
  https://lore.kernel.org/linux-cve-announce/2024072909-CVE-2024-41073-1fb9@gregkh/T
• report
  https://access.redhat.com/security/cve/CVE-2025-40135
• advisory
  https://www.cve.org/CVERecord?id=CVE-2025-40135
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2025-40135
• article
  https://lore.kernel.org/linux-cve-announce/2025111255-CVE-2025-40135-67ca@gregkh/T
• report
  https://access.redhat.com/security/cve/CVE-2025-40158
• advisory
  https://www.cve.org/CVERecord?id=CVE-2025-40158
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2025-40158
• article
  https://lore.kernel.org/linux-cve-announce/2025111258-CVE-2025-40158-4c9d@gregkh/T
• report
  https://access.redhat.com/security/cve/CVE-2025-40170
• advisory
  https://www.cve.org/CVERecord?id=CVE-2025-40170
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2025-40170
• article
  https://lore.kernel.org/linux-cve-announce/2025111259-CVE-2025-40170-d39d@gregkh/T
• report
  https://access.redhat.com/security/cve/CVE-2026-23216
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-23216
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-23216
• article
  https://lore.kernel.org/linux-cve-announce/2026021800-CVE-2026-23216-6c63@gregkh/T
• 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
• report
  https://access.redhat.com/security/cve/CVE-2026-43038
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-43038
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-43038
• article
  https://lore.kernel.org/linux-cve-announce/2026050103-CVE-2026-43038-b591@gregkh/T