Red Hat Security Advisory: kernel security update

Fixed packages 91

Vulnerabilities 4

• High 8.8
  CVE-2026-74469 Public exploit

  sctp: prevent peer transport count overflow

  In the Linux kernel, the following vulnerability has been resolved: sctp: prevent peer transport count overflow sctp_assoc_add_peer() increments the association's 16-bit transport_count for every new unique peer. Adding the 65,536th transport wraps the count …

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Aug 15, 2026
• High 7.8
  CVE-2026-68121 Public exploit

  pppoe: reload header pointer after dev_hard_header()

  In the Linux kernel, the following vulnerability has been resolved: pppoe: reload header pointer after dev_hard_header() pppoe_sendmsg() saves a pointer to the PPPoE header before calling dev_hard_header(). Device header callbacks are allowed to reallocate th…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Aug 10, 2026
• High 7.8
  CVE-2026-81000 Public exploit

  net: tun: bound receive headroom

  In the Linux kernel, the following vulnerability has been resolved: net: tun: bound receive headroom tun_get_user() uses tun->align both as skb headroom and when choosing how much packet data to keep linear. OVS can propagate an oversized headroom request fro…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Sep 11, 2026
• Unscored —
  CVE-2026-80844 Public exploit

  xfrm: ah6: validate routing header segments_left

  In the Linux kernel, the following vulnerability has been resolved: xfrm: ah6: validate routing header segments_left AH6 rearranges routing-header addresses before computing or verifying the ICV. ipv6_rearrange_rthdr() assumes that segments_left is not larger…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Sep 4, 2026

References

• article
  https://access.redhat.com/security/updates/classification/#important
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2513233
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2517043
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2528676
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2532176
• advisory
  https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_71599.json
• report
  https://access.redhat.com/security/cve/CVE-2026-68121
• article
  https://access.redhat.com/security/vulnerabilities/RHSB-2026-011
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-68121
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-68121
• article
  https://lore.kernel.org/linux-cve-announce/2026081056-CVE-2026-68121-b20f@gregkh/T
• report
  https://access.redhat.com/security/cve/CVE-2026-74469
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-74469
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-74469
• article
  https://lore.kernel.org/linux-cve-announce/2026081534-CVE-2026-74469-d3f3@gregkh/T
• report
  https://access.redhat.com/security/cve/CVE-2026-80844
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-80844
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-80844
• article
  https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-80844.mbox
• report
  https://access.redhat.com/security/cve/CVE-2026-81000
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-81000
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-81000
• article
  https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-81000.mbox