Red Hat Security Advisory: kernel security update

Fixed packages 48

Vulnerabilities 3

• Critical 10.0
  CVE-2026-74705

  udp: fix potential use-after-free in tunnel segmentation

  In the Linux kernel, the following vulnerability has been resolved: udp: fix potential use-after-free in tunnel segmentation __skb_udp_tunnel_segment() gets the UDP header before ensuring the tunnel header is in the skb head. If the pull reallocates skb->head…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Aug 22, 2026
• High 7.8
  CVE-2026-63802

  blk-cgroup: fix UAF in __blkcg_rstat_flush()

  In the Linux kernel, the following vulnerability has been resolved: blk-cgroup: fix UAF in __blkcg_rstat_flush() When multiple blkgs in the same blkcg are released concurrently, a use-after-free can occur. The race happens when one blkg's __blkcg_rstat_flush(…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Jul 19, 2026
• High 7.1
  CVE-2026-46149

  scsi: target: configfs: Bound snprintf() return in tg_pt_gp_members_show()

  In the Linux kernel, the following vulnerability has been resolved: scsi: target: configfs: Bound snprintf() return in tg_pt_gp_members_show() target_tg_pt_gp_members_show() formats LUN paths with snprintf() into a 256-byte stack buffer, then will memcpy() cu…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  May 28, 2026

References

• article
  https://access.redhat.com/security/updates/classification/#important
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2482566
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2502251
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2521498
• advisory
  https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_79783.json
• report
  https://access.redhat.com/security/cve/CVE-2026-46149
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-46149
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-46149
• article
  https://kernelcve.org/list/?q=CVE-2026-46149
• article
  https://lore.kernel.org/linux-cve-announce/2026052822-CVE-2026-46149-ad2e@gregkh/T
• report
  https://access.redhat.com/security/cve/CVE-2026-63802
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-63802
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-63802
• article
  https://lore.kernel.org/linux-cve-announce/2026071901-CVE-2026-63802-1c53@gregkh/T
• report
  https://access.redhat.com/security/cve/CVE-2026-74705
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-74705
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-74705
• article
  https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-74705.mbox