Red Hat Security Advisory: kernel security update

Fixed packages 158

Vulnerabilities 3

• Critical 9.8
  CVE-2026-52993 Public exploit

  tipc: fix double-free in tipc_buf_append()

  In the Linux kernel, the following vulnerability has been resolved: tipc: fix double-free in tipc_buf_append() tipc_msg_validate() can potentially reallocate the skb it is validating, freeing the old one. In tipc_buf_append(), it was being called with a point…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Jun 24, 2026
• Critical 9.8
  CVE-2026-64530

  net/sched: cls_api: Handle TC_ACT_CONSUMED in tcf_qevent_handle

  In the Linux kernel, the following vulnerability has been resolved: net/sched: cls_api: Handle TC_ACT_CONSUMED in tcf_qevent_handle tcf_classify() can return TC_ACT_CONSUMED while the skb is held by the defragmentation engine (e.g. act_ct on out-of-order frag…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Jul 26, 2026
• High 7.8
  CVE-2026-52923 Public exploit

  ipc: limit next_id allocation to the valid ID range

  In the Linux kernel, the following vulnerability has been resolved: ipc: limit next_id allocation to the valid ID range The checkpoint/restore sysctl path can request the next SysV IPC id through ids->next_id. ipc_idr_alloc() currently forwards that request t…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Jun 24, 2026

References

• article
  https://access.redhat.com/security/updates/classification/#important
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2492094
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2492437
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2504052
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2507345
• advisory
  https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_49212.json
• report
  https://access.redhat.com/security/cve/CVE-2026-52923
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-52923
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-52923
• article
  https://lore.kernel.org/linux-cve-announce/2026062431-CVE-2026-52923-35fb@gregkh/T
• report
  https://access.redhat.com/security/cve/CVE-2026-52993
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-52993
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-52993
• article
  https://lore.kernel.org/linux-cve-announce/2026062445-CVE-2026-52993-34a2@gregkh/T
• report
  https://access.redhat.com/security/cve/CVE-2026-64530
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-64530
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-64530
• article
  https://lore.kernel.org/linux-cve-announce/2026072624-CVE-2026-64530-52e9@gregkh/T/#u